RickTheEngineer
Member
- 231
- 5
- 16
- Location
- Mount Laurel NJ
Howdy all,
I have been dealing with a fuel gauge problem for some time now and I have a bunch of details to share, so please hear me out.
The problem:
- Fuel gauge floats around, sometimes reading correctly, sometimes not, never pegged full or empty
- Took cluster apart and removed all gauges to read the resistance directly from the connectors behind the fuel gauge. It reads close to the correct value when the vehicle is OFF, but becomes about half as many OHMS when vehicle is ON. Then, drops by another quarter or so when headlights are on
My findings:
- When measured DIRECTLY from the tank sender, it goes from 0 OHMS to 90 OHMS as it should when filling up
- Cleaned all grounds, particularly the one for the sender
- Removed the cluster entirely and measured right from the pigtail, results are similar
- Got under the vehicle and CAREFULLY traced the pink sending wire all the way down the frame, up to the engine bay, through the connector in the fire wall, and to the cluster pigtail. All was in perfect shape, no damage whatsoever
-Once again confirmed with vehicle off, the resistance value was very close to what was on the tank sender directly
-Getting solid 12V from the 12V circuit for the gauge itself
Results:
- Definitely not the cluster traces, problem stems right from the pigtail
- Sending wire is in mint condition without any shorts there
Anyone know what could be causing this?? Thank you all!
I have been dealing with a fuel gauge problem for some time now and I have a bunch of details to share, so please hear me out.
The problem:
- Fuel gauge floats around, sometimes reading correctly, sometimes not, never pegged full or empty
- Took cluster apart and removed all gauges to read the resistance directly from the connectors behind the fuel gauge. It reads close to the correct value when the vehicle is OFF, but becomes about half as many OHMS when vehicle is ON. Then, drops by another quarter or so when headlights are on
My findings:
- When measured DIRECTLY from the tank sender, it goes from 0 OHMS to 90 OHMS as it should when filling up
- Cleaned all grounds, particularly the one for the sender
- Removed the cluster entirely and measured right from the pigtail, results are similar
- Got under the vehicle and CAREFULLY traced the pink sending wire all the way down the frame, up to the engine bay, through the connector in the fire wall, and to the cluster pigtail. All was in perfect shape, no damage whatsoever
-Once again confirmed with vehicle off, the resistance value was very close to what was on the tank sender directly
-Getting solid 12V from the 12V circuit for the gauge itself
Results:
- Definitely not the cluster traces, problem stems right from the pigtail
- Sending wire is in mint condition without any shorts there
Anyone know what could be causing this?? Thank you all!