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cmayna Samba Member
Joined: August 18, 2014 Posts: 1148 Location: SF Bay area, CA
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Posted: Sat Feb 04, 2023 8:37 am Post subject: '90 - 2WD fuel sending unit wiring |
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I want to check the wiring connector to the sending unit for corrosion, etc. Is there a way to reach up to the wiring connector, disengaging it and reconnect it while the tank is in place? Also where does the other end of the grounding wire connect to?
My fuel gauge has been reading 3/4 full after I've topped off the tank and have read a fair amount regarding grounding issues, corrosion, etc.
Just want to see if there's anything I can do before I take the step in dropping the tank.
Thanks _________________ '90 Westy / automatic.
If I'm not working on the camper or my '50 Chebbie truck, I'm either fishing with the wife or smoking Salmon.
Craig |
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MarkWard Samba Member
Joined: February 09, 2005 Posts: 17158 Location: Retired South Florida
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Posted: Sat Feb 04, 2023 9:06 am Post subject: Re: '90 - 2WD fuel sending unit wiring |
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I think with the l/f tire removed, you could get your hand in there. But not sure how much room you'd have for actually checking anything. The harness is quite short at the tank. That said, you could check the gauge prior to the sender.
Here is a useful thread for testing with fixed resistors.
https://www.thesamba.com/vw/forum/viewtopic.php?t=465972
Looking at page 97.209 you can see the current path for the fuel gauge. You could test the gauge at the fusebox at E5. You'd temporarily remove the wire from the fusebox "E" connector. You'd then ground that fusebox pin with one of the above resistor values and then verify the gauge matches the table linked above. If you get the correct readings, you know your problem is between the fusebox and the sender.
Note, it takes a special tool for popping a pin out of the fuesbox harness plugs. _________________ ☮️ |
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djkeev Samba Moderator
Joined: September 30, 2007 Posts: 32647 Location: Reading Pennsylvania
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