Fuel Gauge Wonky, Removed Cluster

donjetman · Jul 10, 2024

Replacing the fuel sender/pump module in the tank didn't fix my fuel gauge with a mind of its own. So today I removed the instrument cluster from the dash and will take it to a local shop tomorrow to see if they can fix it (maybe a bad driver). Maybe even get it customized

http://swtauto.com/

tom3 · Jul 10, 2024

Son had several problems with this, finally quit all together. Sent it off to an outfit called Circuit Medics for a rebuild. Nice and bright with all new lamps and all working fine. Was right at $200 for this two years ago.

donjetman · Jul 12, 2024

Local shop loaned me a good used cluster. No change. Fuel gauge in loaner cluster acts wonky too.
Local shop thinks there a bad ground or chafted wire somewhere since I've already changed the fuel pump/sender module.
I ohmed my old sender thru its range of motion and it looked good/linear, no spikes or dead spots.
I'll keep looking for a bad wire/ground under the vehicle.

petethepug · Jul 17, 2024

Grrr, that’s frustrating. Is there a way to get into a harness connector somewhere and connect a new, known working sender to isolate where the issue may be in the harness?

petethepug · Jul 18, 2024

Just a thought. The temp gauge in my 09 will get a mind of its own about every two years then, back to normal.

The only culprit I could narrow it down to was driving in heavy at highway speed. I was going to swap out my battery cables and replace the BCM if it didn’t stop.

Got silverfish in the tank getting on the level sender contacts jumping the circuit?

donjetman · Jul 18, 2024

petethepug said:
Got silverfish in the tank getting on the level sender contacts jumping the circuit?

I don't know what "silverfish" is???
I installed new fuel pump and level sender. No change. Inside of tank was clean.

Ohmed the old sender and the graph was smooth.

petethepug · Jul 18, 2024

It’s not u, I have a carton mindset. Silverfish, bugs that look coated with silver powder, at least here in so cal. We always joke about them causing any of our electrical issues around the house.

donjetman · Jul 18, 2024

Ants do that here.

mikez71 · Jul 18, 2024

If you need to check wiring, hope this can help..

donjetman · Jul 18, 2024

mikez71 said:
If you need to check wiring, hope this can help..

View attachment 433107
View attachment 433108

Thanks

Fuel Gauge Wonky, Removed Cluster

donjetman

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tom3

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donjetman

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petethepug

Michael

petethepug

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donjetman

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petethepug

Michael

donjetman

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mikez71

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donjetman

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