not sure if this video is still moderated, but what is that 4th wire going to the fan connector for? I am in the process of adding external relays to my car right now due to the dreaded burning of the high and low speed connectors and all the diagrams I see show the same 3 wires you pointed out in your video however I am seeing no info on that 4th pin coming from that fan connector. Is it another ground? Is it blank?
Video was helpful for me, thanks for pointing out which wire is high speed and low speed, that allowed me to connect the stock fan to my LS swap ecu/fan relays.
Thanks, very informative. I have the same car and it started intermittently overheating. Seems the fan doesn't always come on when it's supposed to (when A/C is on or when temp sensor opens). I added a manual switch to the interior, so if it freaks out, I will be able to ground the high relay and get it cooled down. Your video helped me determine the ground plug for the relay. Big help -- much appreciate it!
@@morereps1 Hi, sorry I missed your comment. In Lehew's video, I pushed a stranded wire (probably #12) into the gray colored slot on the left (closest to the firewall). Then, just pushed the relay down on top of it. I guided the wire back around the firewall and out to the cabin by the driver's side door. I used a small stick-on toggle switch found on Amazon. If I click it, the fan goes on high. I did use it twice after the first incident. The 2006 Mustang is starting to have lots of wiring problems now...
@@JBGaming334 I put the stranded wire into the relay hole and pushed the relay on top of it. Then, connected another wire to the body frame (for ground). I guided both wires around to the driver's side door and tucked it back into the cabin that way. I bought a cheap stick-on toggle switch I found on Amazon and connected it to the plastic near the hood release. By the way, while I was down there, I saw the amplifiers there for the Shaker 500.
1:24 Two questions, does it matter which direction the relays are plugged in? Ever came across where the fan doesn’t engage when the AC is turned on? I ran direct power to the resistor and low and high speed come on then. Otherwise the high speed kicks in and out while the motor runs
Thank you for the information, do you know wich temperatures start and switch low speed to highspeed? i had two pin( Low and high outs) damaged in the fuse box terminals due to overheat by loose wires, Could this has affecting the computer outputs?
Hi I have a Ford Mustang 2005 and my fan relay works bust I have to push it so it can work can it be the relay or the fuse box because it loses connection if I don’t keep it push in
I just recently bought an 06 mustang and I’m having trouble getting my cooling fan to kick on also . The previous owner has some crazy wiring going on with some DRL headlights he installed . If you don’t mind me possibly getting some advice from you on how I could fix this I would much appreciate it. 1. The DRL headlights are plugged up where a 15 amp fuse would be .(would this affect it in any way?) 2. I found one problem where the fuse box has melted where the high speed relay is . I’m currently planning on replacing that this weekend . 3. How would I go about removing the top part of the fuse box in order to replace it ?
also check fuse 14 under the passenger side incab fuse boc mine was loose? i pushed it in by coincidence when i was testing all the mini fuses and everything started working all of a sudden.
Another great video. I'm about to install a holley and these help me know which wires I need to intercept to make both the AC and the cooling fan work from the other ecu. Thanks!
How would I know if either speed is not working properly..Took to ac gut said my low speed ain't wrkg properly..but same place 6 months ago said high speed wasn't wrkg to replace fan...So do I replace fan again? By the way the ac blows cold then goes to warm the cold again..compressor goes off and all constantly
Great video !!! This really helped me out a lot, but I need to know what are the colors of the of the wires that feed power to those relays and any other wires that go to those relays?
My fan is not spinning and my mustang over heat only when ac is turn on but the ac is blowing out hot air the compressor is spinning and the coolant is full I have no leaks but just recently see a little fresh coolant coming out the thermostat it self but does that have anything to do with the fan not spinning?
I need help I replaced the fan today it looks like my relays that you show in the video mine not sending the ground on both that make it hot to come on please help my
Hello, could you tell me if 86 of the high fan had power constantly? I see power on the upper left(closest to passenger) but no power on most forward 12v line. The 15a fuse is good
Hi there! first thanks for your Video. 2nd, i have an issue with low speed fan. High fan speed is ok. so, i turned off my car and hock a voltmeter to the white Pin you shows on your video @ 2:09 (which goes to the fan) and hocked the other terminal to the Light/Green wire on the socket. i got 1 reading. mean the its not complete or its short!! i did that same thing on the high fan lower right pin and hock the voltmeter to the Green purple wire and got Zero! which mean its complete or not short. so what you think? do i have issue on the low fan cable or the fuse box got some issues? if i want to isolate the fuse box issue can i hope a lamp tester to the low fan pins and see if its light ( mean it got signal to command low fan ) ? sorry to bother you and thanks on advance.
Hello , is there anyway if fuse box gets burnt for (low speed relay fan) to relocate the relay outside of fuse box but give it power and ground to work ? May sound confusing , if there’s anyway to get in contact with me let me know
Have 2007 Ford Mustang 4.0. If my fan comes on when turn on a/c that means fan okay. The car overheating and had someone replace thermostat and still overheating
Hello I have a car like 06 mustang and it does not turn on the high speed when I turn on the ac but when I put the direct relay of high if the fans work, could you help me thanks for any comment
I don't recognise cooling fan relays for Mercedes E240 model 2000 , there are two yellow ones next to each other numbering 129 the same number for both of them but I am not sure , any advice ?
@@LehewTech it was i am sorry. I found the fan pulled to much amps and melted the green/yellow wire in the fuse block making it not working anymore. So I am attempting to locate a pig tail that will fit that relay to work
So people know I found out that I had a headlight out traced it back after the bulb didn't work found out that the fan relay uses the same ground as the headlight ground and from what I'm being told from some Mustang guys is that it's actually the headlight that draws too much power with the fan on and it's the headlight wiring harness that kills the fan and the whole thing
joe penny so what is solution to fix this problem .....because I have replace the fan assy ,lamp wiring assy that go back into the fuse box under the hood before all this I find two burn at the fuse box under the hood and the second one was at plug that plug into fan on the side now since I have replace and repair problem my fan is still not kick on DO ANYBODY KNOW WHAT ELSE I AM MISSING THAT I HAVENT CHECK OR THAT IT BE PLESE HELP
Screw mustang computer problems and fan, fuse, fog lights etc, I just ran toggle switches to everything bypassing fords useless pcm problems, its such a poor build, all these cars have the same stupid computer problems especially when it gets really cold. A year ago it got down to 4 degrees and my car wouldn't start. Okay dead battery, nope charged the battery and it somehow activated the anti theft system and would read the transponder in the key had to take it to Ford and they had to flash the pcm and cut me 2 new keys and guess what the fan still didn't work so I had to run an external temp module to make it come on when it reach the right temp such a pain. If I didn't love the car so much I'd drive it off a cliff because of all the computer incompetence it was built with.
I've had all manner of problems with the high speed, now the low speed, fan circuit melting the relay block and connections beneath it. All I can determine is the duty cycle is too long and the quality of the parts used is too cheap, thanks Ford. If anyone has another possible explanation, please let me know
i replaced this switch on my 06 mustang and the ac compressor was still cycling on and off. the low pressure side read 40 psi, i read on a forum that is should be 30 psi so i emptied it and filled it to 30. now my compressor isnt engaging at all, any ideas?
Hey man i have a 2008 Ford Mustang GT/CS With 40K Miles on it Just hopeing another Mustang owner of the S197 family can help me figure out what possibly could be wrong Again my car is a 2008 GT/CS My problem is the car is slowly overheating strangely after my A.C stoped working the car seems to only overheat when at idle But the car WONT overheat while I am driving it any ideas? I would appreciate it Car doesn’t have white smoke out the tailpipes Car haven’t lost any power Car radiator doesn’t have any milky water or cap Car doesn’t have any water bubbles out the radiator But i can smell antifreeze when it starts to overheat
Have you checked the coolant hose under the Intake manifold?? It could’ve gone out and be making you lose coolant… there are plenty of video’s that fix that problem… if you smell coolant there has to be a leak… my guess is that hose since it’s the most common thing… the other would be a bad heater core or water pump having a leak
Did you ever figure out what to do? My car is a 2008 mustang gt also and mine does the exact same thing yours has done. AC went out, the shop said new compressor, it worked for twenty min on the way home. Then the car started over heating, no coolant leak.
Oh and now my fan is not working. Checked the harness with resistor and it looks ok. Checked fan fuses, tried to bypass the high fan to see if it would work, it did turn on but fried the wire I used to bypass
It takes alot for your pcm to mess up . You need to start at the problem and be good with a meter. And have good wires to figure it out. Thats how i figured it out. I will have to make a video on how i fixed the issue .
@@taker52 yea I took it to Ford and they couldn't even figure it out, basically last year in February it got so cold that it did something to the pcm to where it activated the antitheft system and wouldn't read my key and wouldnt start or anything, they dont even really know how they got the car started said they just moved a relay around and had to cut me 2 more keys, but they didn't fix my fog light issue or my cooling fan or ac clutch issue, had to run independent toggles for each because the pcm would just not run them right which everything worked right before the cold spell. Oh and they charged me 500 bucks for their incompetence.
@@bentramell729 did they check all the wiring from the climate control system to the ac clutch? Also make sure you have the right amount of oil in the ac clutch. I used a test light and a meter and a bunch of t pins with gator clips to back probe wires . If you are getting the right voltage to it will not work. There are ways to find out if your pcm is dead or sending the wrong sigs . They have ford software that will see it. Even the scan tools will see it and u go verify with you meter thats right.
@@taker52 well they were just tasked with getting it running so they didn't do much of anything else, I asked a bunch of questions but it didn't seem like they were very equipped with the proper knowledge or skills to handle the issue. Ive got the tester and stuff I mean I could probably figure it out myself but idk I've got a mess under the hood at the moment with about 4 foot of snow and ice setting on it right now, tried to start it to warm it the other night took awhile but I got it going but it overheated it was about 17 below 0 and the wire that runs from the temp control module to the radiator was so cold that im guessing it couldn't register the heat either that or my thermostat was frozen and not opening up idk its been a time dealing with this car, fix one thing and another thing goes wrong.
@@bentramell729 unsure what to say brother. Ford is generally good with there stuff. Unless you need the car now i suggest wait on it until spring. I am in the same boat in the northeast hasnt stopped snowing in 4 days.
GREAT VID!! Very concise, easy to follow and to the point. My 05 GT has overheating issues and this is priceless...thank you
My cooling fan never goes off, this is super useful info.
not sure if this video is still moderated, but what is that 4th wire going to the fan connector for? I am in the process of adding external relays to my car right now due to the dreaded burning of the high and low speed connectors and all the diagrams I see show the same 3 wires you pointed out in your video however I am seeing no info on that 4th pin coming from that fan connector. Is it another ground? Is it blank?
I saw another video showing that it was a spare
Video was helpful for me, thanks for pointing out which wire is high speed and low speed, that allowed me to connect the stock fan to my LS swap ecu/fan relays.
Great explanation. It helped me a lot. Thank you for sharing your knowledge.
Thanks, very informative. I have the same car and it started intermittently overheating. Seems the fan doesn't always come on when it's supposed to (when A/C is on or when temp sensor opens). I added a manual switch to the interior, so if it freaks out, I will be able to ground the high relay and get it cooled down. Your video helped me determine the ground plug for the relay. Big help -- much appreciate it!
How did you install the switch
@@morereps1 Hi, sorry I missed your comment. In Lehew's video, I pushed a stranded wire (probably #12) into the gray colored slot on the left (closest to the firewall). Then, just pushed the relay down on top of it. I guided the wire back around the firewall and out to the cabin by the driver's side door. I used a small stick-on toggle switch found on Amazon. If I click it, the fan goes on high. I did use it twice after the first incident. The 2006 Mustang is starting to have lots of wiring problems now...
@@JBGaming334 I put the stranded wire into the relay hole and pushed the relay on top of it. Then, connected another wire to the body frame (for ground). I guided both wires around to the driver's side door and tucked it back into the cabin that way. I bought a cheap stick-on toggle switch I found on Amazon and connected it to the plastic near the hood release. By the way, while I was down there, I saw the amplifiers there for the Shaker 500.
1:24 Two questions, does it matter which direction the relays are plugged in? Ever came across where the fan doesn’t engage when the AC is turned on? I ran direct power to the resistor and low and high speed come on then. Otherwise the high speed kicks in and out while the motor runs
Thank you for the information, do you know wich temperatures start and switch low speed to highspeed? i had two pin( Low and high outs) damaged in the fuse box terminals due to overheat by loose wires, Could this has affecting the computer outputs?
Have same problem here , both outputs don’t work
Just had the same problem, im probably going to take it to a mechanic
I have the same issue. Seems to be a problem with mustangs
Hi I have a Ford Mustang 2005 and my fan relay works bust I have to push it so it can work can it be the relay or the fuse box because it loses connection if I don’t keep it push in
Did you figure it out I have same issue
I just recently bought an 06 mustang and I’m having trouble getting my cooling fan to kick on also . The previous owner has some crazy wiring going on with some DRL headlights he installed . If you don’t mind me possibly getting some advice from you on how I could fix this I would much appreciate it.
1. The DRL headlights are plugged up where a 15 amp fuse would be .(would this affect it in any way?)
2. I found one problem where the fuse box has melted where the high speed relay is . I’m currently planning on replacing that this weekend .
3. How would I go about removing the top part of the fuse box in order to replace it ?
Did he respond?
also check fuse 14 under the passenger side incab fuse boc mine was loose? i pushed it in by coincidence when i was testing all the mini fuses and everything started working all of a sudden.
Another great video. I'm about to install a holley and these help me know which wires I need to intercept to make both the AC and the cooling fan work from the other ecu. Thanks!
Looking for morgue in the inside of 2006 mustang
How would I know if either speed is not working properly..Took to ac gut said my low speed ain't wrkg properly..but same place 6 months ago said high speed wasn't wrkg to replace fan...So do I replace fan again? By the way the ac blows cold then goes to warm the cold again..compressor goes off and all constantly
How do you know if the 40 amp fies is good I’ve checked the other relays and the other fuses you mentioned
Great video !!! This really helped me out a lot, but I need to know what are the colors of the of the wires that feed power to those relays and any other wires that go to those relays?
what if the terminal on the fuse box looks burnt / melted ? where the high speed relay goes
did you ever find out?
@@ELGRILLO420 for me it was a bad fan sending to much voltage to the fuse box. Fix was a new fan and replacement fuse box from a u-pull it place
question what fuse is for the tail lights
Thank you for the explanation you are awesome Tech and explaining how it all works thank you so much 100 %+
My fan is not spinning and my mustang over heat only when ac is turn on but the ac is blowing out hot air the compressor is spinning and the coolant is full I have no leaks but just recently see a little fresh coolant coming out the thermostat it self but does that have anything to do with the fan not spinning?
I need help I replaced the fan today it looks like my relays that you show in the video mine not sending the ground on both that make it hot to come on please help my
Hello, could you tell me if 86 of the high fan had power constantly? I see power on the upper left(closest to passenger) but no power on most forward 12v line. The 15a fuse is good
When I turn the ac will the fan automatically turns on ?
Hi there! first thanks for your Video. 2nd, i have an issue with low speed fan. High fan speed is ok. so, i turned off my car and hock a voltmeter to the white Pin you shows on your video @ 2:09 (which goes to the fan) and hocked the other terminal to the Light/Green wire on the socket. i got 1 reading. mean the its not complete or its short!! i did that same thing on the high fan lower right pin and hock the voltmeter to the Green purple wire and got Zero! which mean its complete or not short. so what you think? do i have issue on the low fan cable or the fuse box got some issues? if i want to isolate the fuse box issue can i hope a lamp tester to the low fan pins and see if its light ( mean it got signal to command low fan ) ? sorry to bother you and thanks on advance.
How do I remove the fuses
Hello , is there anyway if fuse box gets burnt for (low speed relay fan) to relocate the relay outside of fuse box but give it power and ground to work ? May sound confusing , if there’s anyway to get in contact with me let me know
Did you fine away to fix yours mine doing it now
There is a way if you wire it to a switch
The computer doesn't send ground to the relays. Do you have any idea why? Thanks.
Mines doing the same thing did you fine out what was wrong with yours
Have 2007 Ford Mustang 4.0. If my fan comes on when turn on a/c that means fan okay. The car overheating and had someone replace thermostat and still overheating
Would you have the color code for the high speed fan relay control wires?
Hello I have a car like 06 mustang and it does not turn on the high speed when I turn on the ac but when I put the direct relay of high if the fans work, could you help me thanks for any comment
I don't recognise cooling fan relays for Mercedes E240 model 2000 , there are two yellow ones next to each other numbering 129 the same number for both of them but I am not sure , any advice ?
Great video thanks
Very helpful thanks
wonder if this is the same on the 07 model
Should be!
@@LehewTech it was i am sorry. I found the fan pulled to much amps and melted the green/yellow wire in the fuse block making it not working anymore. So I am attempting to locate a pig tail that will fit that relay to work
So people know I found out that I had a headlight out traced it back after the bulb didn't work found out that the fan relay uses the same ground as the headlight ground and from what I'm being told from some Mustang guys is that it's actually the headlight that draws too much power with the fan on and it's the headlight wiring harness that kills the fan and the whole thing
joe penny so what is solution to fix this problem .....because I have replace the fan assy ,lamp wiring assy that go back into the fuse box under the hood before all this I find two burn at the fuse box under the hood and the second one was at plug that plug into fan on the side now since I have replace and repair problem my fan is still not kick on DO ANYBODY KNOW WHAT ELSE I AM MISSING THAT I HAVENT CHECK OR THAT IT BE PLESE HELP
Screw mustang computer problems and fan, fuse, fog lights etc, I just ran toggle switches to everything bypassing fords useless pcm problems, its such a poor build, all these cars have the same stupid computer problems especially when it gets really cold. A year ago it got down to 4 degrees and my car wouldn't start. Okay dead battery, nope charged the battery and it somehow activated the anti theft system and would read the transponder in the key had to take it to Ford and they had to flash the pcm and cut me 2 new keys and guess what the fan still didn't work so I had to run an external temp module to make it come on when it reach the right temp such a pain. If I didn't love the car so much I'd drive it off a cliff because of all the computer incompetence it was built with.
I've had all manner of problems with the high speed, now the low speed, fan circuit melting the relay block and connections beneath it. All I can determine is the duty cycle is too long and the quality of the parts used is too cheap, thanks Ford. If anyone has another possible explanation, please let me know
Did you find a solution? Mine is doing the same thing with the high speed fan relay
@projectlsxify mine is doing the same. Used to be the high speed fan and now it's the low speed that's having issues as the high speed is fixed now
i replaced this switch on my 06 mustang and the ac compressor was still cycling on and off. the low pressure side read 40 psi, i read on a forum that is should be 30 psi so i emptied it and filled it to 30. now my compressor isnt engaging at all, any ideas?
You need to fill it up one more time cause 30 is too low to make the clutch engaged..
How to know if a fuse is damaged ?
What if the relay point is burnt it self, is there a way to change locations but still run power to that place?
Sorry it’s 2 years has been gone but I have some issues 🥲
Thank you. Excelente!!
Hey man i have a 2008 Ford Mustang GT/CS
With 40K Miles on it
Just hopeing another Mustang owner of the S197 family can help me figure out what possibly could be wrong
Again my car is a 2008 GT/CS
My problem is the car is
slowly overheating strangely after my A.C stoped working the car seems to only overheat when at idle
But the car WONT overheat while I am driving it any ideas? I would appreciate it
Car doesn’t have white smoke out the tailpipes
Car haven’t lost any power
Car radiator doesn’t have any milky water or cap
Car doesn’t have any water bubbles out the radiator
But i can smell antifreeze when it starts to overheat
Have you checked the coolant hose under the Intake manifold?? It could’ve gone out and be making you lose coolant… there are plenty of video’s that fix that problem… if you smell coolant there has to be a leak… my guess is that hose since it’s the most common thing… the other would be a bad heater core or water pump having a leak
Did you ever figure out what to do? My car is a 2008 mustang gt also and mine does the exact same thing yours has done. AC went out, the shop said new compressor, it worked for twenty min on the way home. Then the car started over heating, no coolant leak.
Oh and now my fan is not working. Checked the harness with resistor and it looks ok. Checked fan fuses, tried to bypass the high fan to see if it would work, it did turn on but fried the wire I used to bypass
Awesome
Thank u
Yea but if your pcm is not working right none of that matters
It takes alot for your pcm to mess up . You need to start at the problem and be good with a meter. And have good wires to figure it out. Thats how i figured it out. I will have to make a video on how i fixed the issue .
@@taker52 yea I took it to Ford and they couldn't even figure it out, basically last year in February it got so cold that it did something to the pcm to where it activated the antitheft system and wouldn't read my key and wouldnt start or anything, they dont even really know how they got the car started said they just moved a relay around and had to cut me 2 more keys, but they didn't fix my fog light issue or my cooling fan or ac clutch issue, had to run independent toggles for each because the pcm would just not run them right which everything worked right before the cold spell. Oh and they charged me 500 bucks for their incompetence.
@@bentramell729 did they check all the wiring from the climate control system to the ac clutch? Also make sure you have the right amount of oil in the ac clutch. I used a test light and a meter and a bunch of t pins with gator clips to back probe wires . If you are getting the right voltage to it will not work. There are ways to find out if your pcm is dead or sending the wrong sigs . They have ford software that will see it. Even the scan tools will see it and u go verify with you meter thats right.
@@taker52 well they were just tasked with getting it running so they didn't do much of anything else, I asked a bunch of questions but it didn't seem like they were very equipped with the proper knowledge or skills to handle the issue. Ive got the tester and stuff I mean I could probably figure it out myself but idk I've got a mess under the hood at the moment with about 4 foot of snow and ice setting on it right now, tried to start it to warm it the other night took awhile but I got it going but it overheated it was about 17 below 0 and the wire that runs from the temp control module to the radiator was so cold that im guessing it couldn't register the heat either that or my thermostat was frozen and not opening up idk its been a time dealing with this car, fix one thing and another thing goes wrong.
@@bentramell729 unsure what to say brother. Ford is generally good with there stuff. Unless you need the car now i suggest wait on it until spring. I am in the same boat in the northeast hasnt stopped snowing in 4 days.