Do you happen to have the values needed for a '99? Sent our Astro to a local shop and they think it's the PCM but admitted they have no clue and won't diagnose past the PCM. All they've reported to us is that the PCM is receiving a signal. No tests past it to the fuel gauge or anything. Am considering bringing it home to self test. I have a multimeter and would be confident at least trying out this method or something similar. I guess our model year van goes from the sender to the PCM and then from the PCM to the Instrument panel/fuel gauge. Edit: I believe your other comment actually helps me if the '99 and '03 are the same.
@@ClappaGlappa For the '99, the fuel sender operates in the same scale (40 to 250 ohms). When the VCM receives the signal, the signal is modified to between (0 and 90 ohms). I have uploaded the wiring diagram of your model year to www.astrosafari.com/threads/inactive-fuel-gauge-overactive-oil-pressure-gauge.148021/#post-1598734 Should be the latest post. The test shown in this video to check your fuel sender should be the same for the '99.
@@OldSchoolNoe I super appreciate it. I'll have a peek at it when we bring it home and see how it tests. Edit: If I can't figure it out do I think I could just bypass the wiring with an aftermarket 30-250 ohm direct wire fuel gauge and avoid the PCM/VCM?
Absolutely amazing video and is literally taking a huge load off my shoulders of not knowing what is going on. I love how you explained all the electrical diagnosis procedures before pointing to the last possible issue. Thank you dearly my brother
Great video... I've got the same symptoms on my 1997 Chevy Astro. Also i don't hear the pump when ignition key is turned to accessories position... I cleaned the connections at the module... Gas gauge works now. I may have burned out the fuel pump or have a bad relay 🤷♂️. Thanks for this information 👍👍
Thank you Noe and everyone else for the insight..I have not had any problems like this with my 05 (yet) but am remaining vigilant for any signs of a problem. BTW I dislike dropping tanks so all the info on the pinouts will really help out a newbee like me.
Thanks primo I have to check the video again one more time to check where you connected the red and black connectors to the components. I have the same issue the gas cluster stays in empty. I switched the gas pump and still have same issue.but definitely will check the circuit board.
What year is the van? I would verify that the fuel sender is working by doing the first test. It the needle stays on E, that means it could have a bad ground. Have you inspected all ground connections?
Very oddly, my 2000 Passenger van lost both the fuel and temp gauges at the same time. Would greatly appreciate some tips and I'd be willing to pay you.
have you had any work done recently? I would look at grounds G105, then G106, possibly G110. If you need to know the locations of these grounds check out this video th-cam.com/video/BN4wL70HTHI/w-d-xo.html Look at scan tool data to see if the computer is reading engine temperature as it warms up. If it is, there could be an wiring issue between the computer and instrument cluster, or even the instrument cluster itself is defective.
@@OldSchoolNoe I actually watched your grounds video and checked them. They are okay. A weird thing that happened is I blew a bunch of brake fuses, kept replacing them, and each time it blew, this would happen, but now it won’t blow anymore but the gauges don’t work. I’m sure I fried something lol
Hello Oldschool my oil cooling line popped out of the radiator and oil sprayed all over and my van stalled and won't start and the fuel gauge indicator pegs out to the 3 o'clock position , I'm sure oil has caused this my pump is a new Delphi I installed about two months ago and has run really great before the oil bath sprayed everywhere my fuse relay didn't get oil on or under the pins. What do you suggest?
this sounds like a crank but no start situation. Go through the usual diagnosis. 1. make sure no fuses are open 2. verify that you have spark 3. verify that you have adequate fuel pressure if those check out, that rules out a bad CKP sensor, bad CMP sensor, ignition & fuel system. I would check those 3 first, you'll need a spark tester tool, and a fuel pressure gauge. If oil sprayed under the hood, its possible that something shorted out.
The wiring diagram that I found for the 2003 does not show a module. It shows that the fuel pump/sender assembly sends a signal directly to the PCM, then the PCM sends the fuel level signal to the instrument cluster.
@@OldSchoolNoe I must have a problem between the two then. My pump and gauge work fine but sometimes it shoots down to empty or in between. I’m running off the odometer for now till I can figure it out. Thanks again.
@@johnnypena1083 The fuel gauge stays at 0 IF: "The PCM detects a malfunction in the fuel level sensor circuit." "The Instrument Cluster detects a loss of class 2 communications with the PCM."
@@johnnypena1083 I've uploaded the diagram at www.astrosafari.com/threads/inactive-fuel-gauge-overactive-oil-pressure-gauge.148021/#post-1598611 , have you tried the multimeter test shown at 1:49 ?
5:43 The Fuel Sender Gauge Module of this type is only used on the 96 to 98 model. The wiring diagram changes for the later models.
Do you happen to have the values needed for a '99? Sent our Astro to a local shop and they think it's the PCM but admitted they have no clue and won't diagnose past the PCM. All they've reported to us is that the PCM is receiving a signal. No tests past it to the fuel gauge or anything. Am considering bringing it home to self test. I have a multimeter and would be confident at least trying out this method or something similar.
I guess our model year van goes from the sender to the PCM and then from the PCM to the Instrument panel/fuel gauge.
Edit: I believe your other comment actually helps me if the '99 and '03 are the same.
@@ClappaGlappa For the '99, the fuel sender operates in the same scale (40 to 250 ohms). When the VCM receives the signal, the signal is modified to between (0 and 90 ohms). I have uploaded the wiring diagram of your model year to www.astrosafari.com/threads/inactive-fuel-gauge-overactive-oil-pressure-gauge.148021/#post-1598734
Should be the latest post. The test shown in this video to check your fuel sender should be the same for the '99.
@@OldSchoolNoe I super appreciate it. I'll have a peek at it when we bring it home and see how it tests.
Edit: If I can't figure it out do I think I could just bypass the wiring with an aftermarket 30-250 ohm direct wire fuel gauge and avoid the PCM/VCM?
Absolutely amazing video and is literally taking a huge load off my shoulders of not knowing what is going on. I love how you explained all the electrical diagnosis procedures before pointing to the last possible issue. Thank you dearly my brother
oh my god I'm so excited to go to a junkyard and pull one of these! I looked all over online and I can't find a new replacement. Thanks Noe!
Great video... I've got the same symptoms on my 1997 Chevy Astro. Also i don't hear the pump when ignition key is turned to accessories position...
I cleaned the connections at the module... Gas gauge works now. I may have burned out the fuel pump or have a bad relay 🤷♂️.
Thanks for this information 👍👍
Thank you Noe and everyone else for the insight..I have not had any problems like this with my 05 (yet) but am remaining vigilant for any signs of a problem. BTW I dislike dropping tanks so all the info on the pinouts will really help out a newbee like me.
ThaNK YOU so much for producing this and sharing. So guiding... So informative!!!
thanks so much friend, I am from gusdalajara in mexico I solved the problem thanks to you.
Excellent!
Thanks primo I have to check the video again one more time to check where you connected the red and black connectors to the components. I have the same issue the gas cluster stays in empty. I switched the gas pump and still have same issue.but definitely will check the circuit board.
What year is the van? I would verify that the fuel sender is working by doing the first test. It the needle stays on E, that means it could have a bad ground. Have you inspected all ground connections?
I'am Your Newest Subscriber Great Videos I just Got A 1999 Astro Van
Right On!
You know what you are doing thanks
Good info homey 🤙
Hi buddy,,big cuestión !!! The gmc safari 2000 it’s the same are is in another place the module??? Tks
Good job man!
😎👍
Very oddly, my 2000 Passenger van lost both the fuel and temp gauges at the same time. Would greatly appreciate some tips and I'd be willing to pay you.
have you had any work done recently?
I would look at grounds G105, then G106, possibly G110. If you need to know the locations of these grounds check out this video
th-cam.com/video/BN4wL70HTHI/w-d-xo.html
Look at scan tool data to see if the computer is reading engine temperature as it warms up. If it is, there could be an wiring issue between the computer and instrument cluster, or even the instrument cluster itself is defective.
@@OldSchoolNoe I actually watched your grounds video and checked them. They are okay. A weird thing that happened is I blew a bunch of brake fuses, kept replacing them, and each time it blew, this would happen, but now it won’t blow anymore but the gauges don’t work. I’m sure I fried something lol
Hello Oldschool my oil cooling line popped out of the radiator and oil sprayed all over and my van stalled and won't start and the fuel gauge indicator pegs out to the 3 o'clock position , I'm sure oil has caused this my pump is a new Delphi I installed about two months ago and has run really great before the oil bath sprayed everywhere my fuse relay didn't get oil on or under the pins. What do you suggest?
this sounds like a crank but no start situation.
Go through the usual diagnosis.
1. make sure no fuses are open
2. verify that you have spark
3. verify that you have adequate fuel pressure
if those check out, that rules out a bad CKP sensor, bad CMP sensor, ignition & fuel system.
I would check those 3 first, you'll need a spark tester tool, and a fuel pressure gauge.
If oil sprayed under the hood, its possible that something shorted out.
@@OldSchoolNoe thank you so much for that advice , I have a fuel pressure tester I'm going to get the spark tester at harbor freight
@@OldSchoolNoe I will let you know how it goes after I do these tests
@@hardtrooth1776 but did you take a look at the fuses? I would do that first before buying anything, make sure none are blown.
@@OldSchoolNoe I will check them in the morning
Great job
Sweet
Very good video, my friend. Thank you for posting this and you have my thumbs up and I am subscribing to your Channel.👍
6:37 gas gauge hesitation from the engine starter
Where is the module on a 2003 ? Thanks
The wiring diagram that I found for the 2003 does not show a module. It shows that the fuel pump/sender assembly sends a signal directly to the PCM, then the PCM sends the fuel level signal to the instrument cluster.
@@OldSchoolNoe I must have a problem between the two then. My pump and gauge work fine but sometimes it shoots down to empty or in between. I’m running off the odometer for now till I can figure it out. Thanks again.
@@johnnypena1083 The fuel gauge stays at 0 IF:
"The PCM detects a malfunction in the fuel level sensor circuit."
"The Instrument Cluster detects a loss of class 2 communications with the PCM."
@@OldSchoolNoe what color wires should I test then. Thanks again.
@@johnnypena1083 I've uploaded the diagram at www.astrosafari.com/threads/inactive-fuel-gauge-overactive-oil-pressure-gauge.148021/#post-1598611 , have you tried the multimeter test shown at 1:49 ?
6:19 gas gauge hesitation
Since then I replaced the module with one that I found at the junkyard. It doesn't go "crazy" anymore.