Great information. I didn't know how to use the buttons but worse, since I purchased my '94 @ 20 yrs ago, the cruise control didn't work and of course my thought was "who the heck needs this on a Corvette" lol. Last year I drove from So. Cal up to Grover Beach (just north of Santa Barbara) and realized it would have been nice if the cruise control worked. My right leg just wasn't happy. Low and behold, while cleaning the engine bay, I noticed tucked deep behind the left wheel well there was a vacuum line which wasn't connected. I traced it back and found that it led to one of the ports on the cruise control servo. After connecting it, and taking out to test it, IT WORKED!. After feeling a bit foolish, I've been enjoying it.
Awesome! I tell people to first check the vacuum lines....easiest thing to do. I nearly went down and messed with the cc switch at the brake petal. I would have spent hours under there messing around when all it turned out to be was a disconnected vacuum line. Glad your cc is working. Check out his video on the ASR system. Another valuable learning experience as I thought it was the ABS system. Not so, very different systems which work in conjunction with each other.
I'm glad to hear it was helpful. I would agree with you. Cruise control on a long trip is a necessary luxury that I appreciate more and more the older I get😁.
My ecu in the engine bay was resting on the cruise control vacuum module because of a worn out plastic bracket on the ecu. This caused the rubber cruise control module to pull the throttle cable and give the car gas when I was totally off the gas. This was especially noticeable on bumpy roads.
Yeo, a broken ECM mount can cause quite a few problems. I have to address it on my 1996 Competition Yellow LT4. Shutting the hood is quite difficult sometimes.
Actually, according to Professor Google, a cruise control system was first used in the very early 1900s and our modern cruise control was invented in the late 1940s by a guy named Ralph Teetor. It was first used by Chrysler the name Cruise Control was first applied by Cadillac in the mid sixties.
Next time, Brian, give us an in-depth breakdown of automatic throttle control in the F/A-18C Hornet! I'm just kidding. Have an awesome weekend, Dude! Great explanation!😎
How do you turn on the high beams on these c4's? Is it on the multifunction switch? Or is it only controlled the left side where you control the popup headlights, I'm very confused about this or if it even has a switch for them 12:12
Hey Eduardo, you just pull the turn signal switch towards you to activate or deactivate the high brams. You should hear an audible click when you pull it towards you. If you don't, the internal part of the turn signal switch could be broken. It's a common problem with these years.
I discovered today that the bottom vacuum line on the solenoid seems to be completely missing. I can't find the line or a place where the line would be connected if it was on the solenoid. Can you tell me what that bottom vac line is supposed to connect to? Thanks!
That line runs back along the driverside frame rail to the left front inner fenderwell and connects to the round vacuum reservoir mounted next to the headlight module. Most likely, it was broken off at some point in your cars past, and they never bothered to replace it.
@VetteSource thats what it looked like in the FSM. But on mine the line from the vacuum reservoir runs to a T fitting right under the ASR. The other lines connected to that are a larger black hose that runs down next to the engine (I think its part of the AC system) and the other is a small hard plastic hose with an elbow that joins some electrical wires and goes into the firewall...there seems to be no place to connect another hose.
@@ObscureStuff420 Did you figure it out? I had the same issue and found the line tucked deep behind to the rear the inside of the front left wheel well, underneath the fuse box. Simply pulled it out, reconnected it to the lower fitting on the servo and it worked!
What's the possible issue if I have a cruise control that can't be turned off without tapping the brakes? With the switch set to off on the stalk I can still set the speed with the button.
Hello, I've been having issues with my cruise refusing to engage on my '96. I confirmed the solenoid does get vacuum, but is there any way to know if it's getting power without digging into the dash for the module? I feel a bit nervous about working right under my passenger airbag.
I understand, working under the dash isnt that mich fun. You can unplug the electrical connector from the cruise module under the hood to back probe the terminals to verify power. Also, take the module loose from the bracket and carefully inspect the rubber diaphragm for any cracks of tears. Very often you'll find that to be the source of the problem. Let me know how it goes.
@@titoqwentezproductionz3406 with the engine running, pull off one of the rubber hoses that connects to the cruise solenoid over the battery. If you feel suction, you've got vacuum
I’ve had 3 C4 Corvettes. A 1987 bought new and 1994 bought new, and a 1994 bought in 2016. The cruise control works intermittently and the big Corvette shops in Palm Beach County Florida refused to work on it. I have to press the set button several times before it engages. Once engaged it works fine until it’s discontinued by braking or clutch. To re-engage from a stop, again I have to keep pressing the button to re-engage for however long before it finally decides to engage. Do you have any suggestions on how to make it work right?
My first thought would be the button at the end of the turn signal is not working properly since that seems to be the common theme every time you make an attempt to engage the system. Once it's engaged, does it work to lower the set speed when depressed?
@@VetteSource It does. Once the cc is disengaged the lever will re-start it unless I come to a stop or it’s been disengaged w/o stopping for a few minutes. I had given some thought to spraying some stuff into the stalk to dissolve any oxidation. However, intermittent cc is better than none. Getting decent work on my car so far has been practically impossible in Palm Beach County Florida. I bought replacement weather stripping and took it to a body shop last week. They practically wrecked my car. The doors won’t close w/o very hard slamming, the interior door panels are falling off, the drivers window is inoperable, the top is bending up at the corners, and the rear hatch is messed up. I provided the rubber I got on eBay, so I can’t say if the rubber was wrong or the shop messed up. I wish I had let the minor leak alone, because now it would be like I had no seal at all. I’m waiting on a mobile guy who has done ok work before, replacing the radio and a climate control head unit I bought off of eBay, to try and fix it or remove it all. Ironically, I am well enough off, that money is not an important factor when seeking repairs. I’m thinking of dumping it for a C5.
I hear ya, that's an unneeded aggravation. Finding technicians with the patience and determination to properly repair our older Corvettes is a constant struggle. Then factor in the "Corvette" premium hourly rate everyone wants to charge regardless of skill level, and it just ends up leaving a bad taste in your mouth. Even though I like C5's quite a bit, moving up from a C4 might be like going from the frying pan into the fire. The C5 has reached an age where they are experiencing multiple hard electrical failures, rendering many of them stuck and broken in the garage awaiting a qualified technician that can not only work on them but source the necessary parts needed.
@@VetteSource yeah, until my latest experience messing my car up by the body shop, I was a C4 aficionado. Other than a 1967 427, I think the C4 is the most appealing body design. If I can get the weather stripping decently fixed along with all else the shop messed up, I would want to keep it. The more days that go by where I can’t use the car, the antsier I get to get rid of it and start with something newer. I listened to Lyle @C&S who listed the best years for the C5 and what to beware of.
Yep, I think I've seen that video. I'm like you, I prefer the C4 body style a bit more that the C5. Plus even though they have some difficult electronics they're not quite as challenging as the C5's.
So what should I check when the antenna makes no noise but has power, and what's the relay that's in the rear of my 95 Vette located on the passenger side under the center trim piece?
The relay next to the window latch is to activate the hatch release. The relay for the antenna is closer to the antenna, next to the wiring harness. The relay is there to switch power from one side of the antenna to the other causing it to extend or retract. Usually when it won't do anything the antenna itself is bad.
@@VetteSource This video was mostly about the components and location of the cruise control, but not how to troubleshoot the system. Mine doesn't activate. Do you know where the fuse or circuit breaker is for the cruise control?
The fuse should be in the main fusebox located at the passenger side of the dash in the door jamb if I am remembering correctly. You can start there, and then I would recommend checking the vacuum supply to the cruise servo itself. Many times you'll find there's a damaged vacuum hose or the diaphragm itself on the servo has a tear in it.
@@stricklandgarageaviation2864 Did you figure it out? Start with vacuum lines. One of the vacuum lines to mine disconnected from the lower port of the servo. Never noticed until I traced it back behind the wheel well under the fuse box.
I would take a closer look at the rubber diaphragm part of the cruise module. My guess is that you have a split or tear which allows the vacuum to escape the system.
I use cruise control all the time from speed limits of 35 and above. to make sure I don’t break the speed limit. Sadly my system in a 1994 Corvette is intermittent. It takes me about five times pressing the button to catch. My Corvette mech won’t fix it or anything that takes used electronic parts.
@@VetteSource I was thinking that myself. Though I know the speed sensor for my antilock breaks and slip control is kaput and I thought maybe it is also needed for cruise control
The ASR module is definitely a must have, not sure if a bad wheel speed sensor will disble the cruise. I'd have to reference the FSM to be certain. Good news is the ASR modules are a very reliable piece of equipment even if they're used, so I wouldn't worry about putting one on your car.
@@VetteSource my main beef with my car is not the cost of repairs, it’s getting anyone to do the repairs competently. Last week a body shop made my car all but unusable when they botched the job of upgrading my weather stripping making it less weather secure, the doors almost unclosable, the inner doors are falling off the drivers window inoperable, the top distorted, the hatch sprung. I supplied the parts and don’t know if it was bad parts or bad work or both.
Hey Gordon, the radio and cruise systems are separate. The cruise module is located under the center of the dash and is accessed by removing the dash pad.
Hey Gordy, after looking through my inventory, all I have for now are rebuildable cores. I believe they stoll sell them new in the catalogs, that might be a good way to go for the short term. If you have some time to work with I can probably source one for you within a few weeks.
Hello Bryan thanks for your feedback on the ride control question that I had on the C4 thank you for telling me if you do or don't have it the right control it's not a deal-breaker. I have another question between the 95 and 96 Corvette the OBD2 is fully functional on the 96 Corvette so is it better to have a 96 Corvette 10 + 95 I want to find one did I can drive everyday Drive the wheels off of it thank you for all your videos and I really respect and appreciate all your hard work did you put into this channel like I said before I'm very proud to be a subscriber to your Channel you have a great day now
Hey Kenny, the C4 was one of GM's vehicles they tested the OBDII functionality on starting in 1994 and 95, and then fully integrating with the 96's. With that being said, I don't think you'll find any functional difference in performance or troubleshooting capabilities between the OBDI 95 and OBDII 96's. If anything you may run into trouble finding someone with the appropriate scanner to diagnose an OBDII problem on the 96.
This was the best video I could find in relation to that same multifunction switch on my '96 Regal. Thanks!
Great, glad to hear it was helpful. Thanks for the feedback👍.
is there a light or any indicator on the dash that cruise is turned on?
amazingly enough, a C4 corvette does not have a "cruise control engaged" indicator lamp
Great information. I didn't know how to use the buttons but worse, since I purchased my '94 @ 20 yrs ago, the cruise control didn't work and of course my thought was "who the heck needs this on a Corvette" lol. Last year I drove from So. Cal up to Grover Beach (just north of Santa Barbara) and realized it would have been nice if the cruise control worked. My right leg just wasn't happy. Low and behold, while cleaning the engine bay, I noticed tucked deep behind the left wheel well there was a vacuum line which wasn't connected. I traced it back and found that it led to one of the ports on the cruise control servo. After connecting it, and taking out to test it, IT WORKED!. After feeling a bit foolish, I've been enjoying it.
Awesome! I tell people to first check the vacuum lines....easiest thing to do. I nearly went down and messed with the cc switch at the brake petal. I would have spent hours under there messing around when all it turned out to be was a disconnected vacuum line. Glad your cc is working. Check out his video on the ASR system. Another valuable learning experience as I thought it was the ABS system. Not so, very different systems which work in conjunction with each other.
I'm glad to hear it was helpful. I would agree with you. Cruise control on a long trip is a necessary luxury that I appreciate more and more the older I get😁.
My ecu in the engine bay was resting on the cruise control vacuum module because of a worn out plastic bracket on the ecu. This caused the rubber cruise control module to pull the throttle cable and give the car gas when I was totally off the gas. This was especially noticeable on bumpy roads.
Yeo, a broken ECM mount can cause quite a few problems. I have to address it on my 1996 Competition Yellow LT4. Shutting the hood is quite difficult sometimes.
@VetteSource that was another issue I had. Once I adjusted the ecu and harness, and dropped the hood from the appropriate 18" height it closes great.
Yep, everything is packaged so tightly in that one corner. Anything that is out of alignment will cause issues with multiple other systems.
Love the value your content provides us.
As always, greatly appreciate the praise and glad to do it my friend.
Actually, according to Professor Google, a cruise control system was first used in the very early 1900s and our modern cruise control was invented in the late 1940s by a guy named Ralph Teetor. It was first used by Chrysler the name Cruise Control was first applied by Cadillac in the mid sixties.
Thanks for sharing, Robert👍.
@@VetteSource 👌🏻
Next time, Brian, give us an in-depth breakdown of automatic throttle control in the F/A-18C Hornet! I'm just kidding. Have an awesome weekend, Dude! Great explanation!😎
Nice! Now if I could just get enough time for a walk-around that would be awesome. Have a great weekend yourself👍.
How do you turn on the high beams on these c4's? Is it on the multifunction switch? Or is it only controlled the left side where you control the popup headlights, I'm very confused about this or if it even has a switch for them 12:12
Hey Eduardo, you just pull the turn signal switch towards you to activate or deactivate the high brams. You should hear an audible click when you pull it towards you. If you don't, the internal part of the turn signal switch could be broken. It's a common problem with these years.
@@VetteSource thank you so much just tested it, and mine work! I thought mine was broken but I guess I wasn't pulling it back enough 😅.
Thanks for ur vids! I need to replace the spark plug wires on my lingenfelter lt4
Hey Gray, glad to do it. That's an uncommon car, haven't seen to.may Lingenfelter LT4 conversions.
I discovered today that the bottom vacuum line on the solenoid seems to be completely missing. I can't find the line or a place where the line would be connected if it was on the solenoid. Can you tell me what that bottom vac line is supposed to connect to? Thanks!
That line runs back along the driverside frame rail to the left front inner fenderwell and connects to the round vacuum reservoir mounted next to the headlight module. Most likely, it was broken off at some point in your cars past, and they never bothered to replace it.
@VetteSource thats what it looked like in the FSM. But on mine the line from the vacuum reservoir runs to a T fitting right under the ASR. The other lines connected to that are a larger black hose that runs down next to the engine (I think its part of the AC system) and the other is a small hard plastic hose with an elbow that joins some electrical wires and goes into the firewall...there seems to be no place to connect another hose.
I'll take a look at one of my cars today to check for exact routing and get back to you.
@VetteSource awesome! This has got me scratching my head and my local mechanic couldn't figure it out either.
@@ObscureStuff420 Did you figure it out? I had the same issue and found the line tucked deep behind to the rear the inside of the front left wheel well, underneath the fuse box. Simply pulled it out, reconnected it to the lower fitting on the servo and it worked!
What's the possible issue if I have a cruise control that can't be turned off without tapping the brakes? With the switch set to off on the stalk I can still set the speed with the button.
My first thought would be that the turn signal on/off switch is malfunctioning.
Hiya!~that is super picture, amigo,
Thanks man, it helps to have a good phone camera😁.
Hello, I've been having issues with my cruise refusing to engage on my '96. I confirmed the solenoid does get vacuum, but is there any way to know if it's getting power without digging into the dash for the module? I feel a bit nervous about working right under my passenger airbag.
I understand, working under the dash isnt that mich fun. You can unplug the electrical connector from the cruise module under the hood to back probe the terminals to verify power. Also, take the module loose from the bracket and carefully inspect the rubber diaphragm for any cracks of tears. Very often you'll find that to be the source of the problem. Let me know how it goes.
@@VetteSource looks like no power to the solenoid, weird
Yep, that is odd. First thought would be to check the cruise fuse.
how do you check the solenoid if it gets vacuum? trying to fix this problem myself lol
@@titoqwentezproductionz3406 with the engine running, pull off one of the rubber hoses that connects to the cruise solenoid over the battery. If you feel suction, you've got vacuum
I’ve had 3 C4 Corvettes. A 1987 bought new and 1994 bought new, and a 1994 bought in 2016. The cruise control works intermittently and the big Corvette shops in Palm Beach County Florida refused to work on it. I have to press the set button several times before it engages. Once engaged it works fine until it’s discontinued by braking or clutch. To re-engage from a stop, again I have to keep pressing the button to re-engage for however long before it finally decides to engage. Do you have any suggestions on how to make it work right?
My first thought would be the button at the end of the turn signal is not working properly since that seems to be the common theme every time you make an attempt to engage the system. Once it's engaged, does it work to lower the set speed when depressed?
@@VetteSource It does. Once the cc is disengaged the lever will re-start it unless I come to a stop or it’s been disengaged w/o stopping for a few minutes. I had given some thought to spraying some stuff into the stalk to dissolve any oxidation. However, intermittent cc is better than none.
Getting decent work on my car so far has been practically impossible in Palm Beach County Florida. I bought replacement weather stripping and took it to a body shop last week. They practically wrecked my car. The doors won’t close w/o very hard slamming, the interior door panels are falling off, the drivers window is inoperable, the top is bending up at the corners, and the rear hatch is messed up. I provided the rubber I got on eBay, so I can’t say if the rubber was wrong or the shop messed up. I wish I had let the minor leak alone, because now it would be like I had no seal at all. I’m waiting on a mobile guy who has done ok work before, replacing the radio and a climate control head unit I bought off of eBay, to try and fix it or remove it all. Ironically, I am well enough off, that money is not an important factor when seeking repairs. I’m thinking of dumping it for a C5.
I hear ya, that's an unneeded aggravation. Finding technicians with the patience and determination to properly repair our older Corvettes is a constant struggle. Then factor in the "Corvette" premium hourly rate everyone wants to charge regardless of skill level, and it just ends up leaving a bad taste in your mouth.
Even though I like C5's quite a bit, moving up from a C4 might be like going from the frying pan into the fire. The C5 has reached an age where they are experiencing multiple hard electrical failures, rendering many of them stuck and broken in the garage awaiting a qualified technician that can not only work on them but source the necessary parts needed.
@@VetteSource yeah, until my latest experience messing my car up by the body shop, I was a C4 aficionado. Other than a 1967 427, I think the C4 is the most appealing body design. If I can get the weather stripping decently fixed along with all else the shop messed up, I would want to keep it. The more days that go by where I can’t use the car, the antsier I get to get rid of it and start with something newer. I listened to Lyle @C&S who listed the best years for the C5 and what to beware of.
Yep, I think I've seen that video. I'm like you, I prefer the C4 body style a bit more that the C5. Plus even though they have some difficult electronics they're not quite as challenging as the C5's.
My dad‘s 65 Lincoln with suicide doors had cruise control with LCD read out
Now that is a cool piece of trivia. I didn't know LCD existed back then during the age of dinos🤣
So what should I check when the antenna makes no noise but has power, and what's the relay that's in the rear of my 95 Vette located on the passenger side under the center trim piece?
The relay next to the window latch is to activate the hatch release. The relay for the antenna is closer to the antenna, next to the wiring harness. The relay is there to switch power from one side of the antenna to the other causing it to extend or retract. Usually when it won't do anything the antenna itself is bad.
I just subscribed. Do you talk about trouble shooting the cruise control if it doesn't activate?
As a matter of fact I did -
th-cam.com/video/E5ihXB5yAGs/w-d-xo.html
Let me know if you need any more information and thanks for the sub👍.
@@VetteSource This video was mostly about the components and location of the cruise control, but not how to troubleshoot the system. Mine doesn't activate. Do you know where the fuse or circuit breaker is for the cruise control?
The fuse should be in the main fusebox located at the passenger side of the dash in the door jamb if I am remembering correctly. You can start there, and then I would recommend checking the vacuum supply to the cruise servo itself. Many times you'll find there's a damaged vacuum hose or the diaphragm itself on the servo has a tear in it.
@@stricklandgarageaviation2864 Did you figure it out? Start with vacuum lines. One of the vacuum lines to mine disconnected from the lower port of the servo. Never noticed until I traced it back behind the wheel well under the fuse box.
1989 vette cruise control does not work fuse is good n call connections look ok what else can I look for thanks
I would take a closer look at the rubber diaphragm part of the cruise module. My guess is that you have a split or tear which allows the vacuum to escape the system.
Also check the vacuum lines. If originally, they are definitely worn, stretched out, and cracked.
Is there a seal on that outer connector?
Yes, there should be a small rubberized seal on the male end of the connector.
I use cruise control all the time from speed limits of 35 and above. to make sure I don’t break the speed limit. Sadly my system in a 1994 Corvette is intermittent. It takes me about five times pressing the button to catch. My Corvette mech won’t fix it or anything that takes used electronic parts.
It's most likely the turn signal/cruise lever assembly which I believe may still be available new.
@@VetteSource I was thinking that myself. Though I know the speed sensor for my antilock breaks and slip control is kaput and I thought maybe it is also needed for cruise control
The ASR module is definitely a must have, not sure if a bad wheel speed sensor will disble the cruise. I'd have to reference the FSM to be certain. Good news is the ASR modules are a very reliable piece of equipment even if they're used, so I wouldn't worry about putting one on your car.
@@VetteSource 😎👌🏻
@@VetteSource my main beef with my car is not the cost of repairs, it’s getting anyone to do the repairs competently. Last week a body shop made my car all but unusable when they botched the job of upgrading my weather stripping making it less weather secure, the doors almost unclosable, the inner doors are falling off the drivers window inoperable, the top distorted, the hatch sprung. I supplied the parts and don’t know if it was bad parts or bad work or both.
Are the radio and cruise control intertwined, and where is the cruise control relay located?
Hey Gordon, the radio and cruise systems are separate. The cruise module is located under the center of the dash and is accessed by removing the dash pad.
So do you a radio antenna for sale?
Thanks,
Gordy Beukema
I'll check today and see if I have a good antenna unit in stock. Be back in touch in a few.
@@VetteSource Good Morning, Just wondering if you found an antenna for my 95 Vette, or if someone you know has one.
Thanks,
Gordy Beukema
Hey Gordy, after looking through my inventory, all I have for now are rebuildable cores. I believe they stoll sell them new in the catalogs, that might be a good way to go for the short term. If you have some time to work with I can probably source one for you within a few weeks.
Hello Bryan thanks for your feedback on the ride control question that I had on the C4 thank you for telling me if you do or don't have it the right control it's not a deal-breaker. I have another question between the 95 and 96 Corvette the OBD2 is fully functional on the 96 Corvette so is it better to have a 96 Corvette 10 + 95 I want to find one did I can drive everyday Drive the wheels off of it thank you for all your videos and I really respect and appreciate all your hard work did you put into this channel like I said before I'm very proud to be a subscriber to your Channel you have a great day now
Hey Kenny, the C4 was one of GM's vehicles they tested the OBDII functionality on starting in 1994 and 95, and then fully integrating with the 96's.
With that being said, I don't think you'll find any functional difference in performance or troubleshooting capabilities between the OBDI 95 and OBDII 96's.
If anything you may run into trouble finding someone with the appropriate scanner to diagnose an OBDII problem on the 96.
Cruise Control i use so i don't get a speeding ticket! 😉😊
There it is, yet another added benefit of cruise control, especially in a high powered Corvette👍.
Mine doesn’t work. Lol it’ll
Be cool to have though.
I hear ya, not that terribly hard of a system to diagnose. Let me know if you need any guidance👍.