fuel level sensor wiring
Thread Starter
Joined: Jun 2005
Posts: 4,641
Likes: 392
From: cookeville, TN
fuel level sensor wiring Long story short I have a aftermarket guage cluster and uses the factory sending unit signal car also has a stand alone harness. Had it wired in at one point directly at the plug on the sending unit. When I sound deadened the interior I disconnected it and cant find it without pulling the interior. (this was done many years prior) recently got the car running right but fuel gauge is obviously not working
My question is where does the black and purple wires for the level sensor go and are they accessible under the dash? Im assuming they connect to one of the 3 connecters that mated to the OE ecm harness? Car is an 01.
hopefully this is the right place, thanks in advance.
My question is where does the black and purple wires for the level sensor go and are they accessible under the dash? Im assuming they connect to one of the 3 connecters that mated to the OE ecm harness? Car is an 01.
hopefully this is the right place, thanks in advance.
Thread Starter
Joined: Jun 2005
Posts: 4,641
Likes: 392
From: cookeville, TN
okay kept digging found out the fuel level sensor lead (purple wire) goes to the C230 connector behind the passenger side kick panel. This conenctor usually goes back to the OE ECM harness, but since Im on a stand alone its no longer connected. however the purple lead for the from that connector is redirected to the aftermarket gauge I have to provide the resistance signal.
but since the signal isnt connected to anything OE anymore im guessing the ground isnt either. Now I didnt see a ground wire in the pinout of this connector. The second wire on the level sensor is a black wire, but not sure where it goes. I have the access hatch on the trunk deck, so I can see it and im guessing it goes to the bulk head on the driver side of the back seat wall and comes into the car from there but not sure where it goes after that or where is a good spot to make sure its still grounded.
but since the signal isnt connected to anything OE anymore im guessing the ground isnt either. Now I didnt see a ground wire in the pinout of this connector. The second wire on the level sensor is a black wire, but not sure where it goes. I have the access hatch on the trunk deck, so I can see it and im guessing it goes to the bulk head on the driver side of the back seat wall and comes into the car from there but not sure where it goes after that or where is a good spot to make sure its still grounded.
TECH Apprentice
Joined: Oct 2018
Posts: 336
Likes: 85
From: Glendale, AZ
Looks like you're on the right track, Pretty sure both wires go into the bulkhead in the wheelwell. Not sure after that. Possibly your wires got disconnected at that bulkhead when you deadened it.
Thread Starter
Joined: Jun 2005
Posts: 4,641
Likes: 392
From: cookeville, TN
Yeah circuit is good minus ground, so I made a little jumper but it still sat below E with the key on. So I'm gonna get more fuel today or tomorrow. I'm getting 66ohms of resistance across the sensor which is consistent with empty tank, but it should have around 10 gallons in it.... So my float maybe stuck?
Good thing for access hatch so I can pull the sender and have a look
Good thing for access hatch so I can pull the sender and have a look
Thread Starter
Joined: Jun 2005
Posts: 4,641
Likes: 392
From: cookeville, TN
Figured it out I think....... Well I know why the fuel level sensor wasn't working. The sliding resistor board cracked in half.
But what I don't understand is it seems at some.point I cross wired the sending unit wires and the fuel pump wires
My pump was working but I do not understand how it was grounded.
But what I don't understand is it seems at some.point I cross wired the sending unit wires and the fuel pump wires
My pump was working but I do not understand how it was grounded.
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Verdad Gallardo Thread Starter
Joined: Jun 2005
Posts: 4,641
Likes: 392
From: cookeville, TN
Yup and apparently in the process solved a problem I didn't know I had with he fuel pump wiring. Ordered a new fuel level sensor and should be here midweek. This is the end of the broken from.setting so long/issues from.my swap!