Thread: fuel gauge wiring

well my fuel gauge hasnt worked since i bought my car about a year ago, so i figured its time to stop modding and start fixing.
there is already a new complete fuel pump installed and the wiring shows no resistance from the pump to the passenger kickpanel. however there is resistance from the kickpanel to the back of the gauge. does anyone know the wiring behind the dash? or any ideas? the gauge always reads full btw.
thanks for any input

A new fuel pump means nothing. The sending unit/float that clips to the fuel pump died and needs to be swapped out. It simply clips to the side of the pump assembly.

A new sending unit is around $90 at gmpartsdirect.com, and I installed mine in about 1/2 hour.

i meant to say i replaced the whole assembly, pump, sender, all. complete drop in unit

i guess this is a new problem where as nobody seems to have experienced this before.
anybody out there with any ideas before i get knee deep in dash wire looms? at least a wiring diagram?

ALLDATAdiy.com :: Leading Source of Diagnostic and Repair Information is awesome for diagrams and helpful info regarding any car. It does cost though.

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thanks i appreciate it. ive used it before at my shops and it always comes in handy

was kinda hoping someone may have a diagram first, if not ill give it a shot

well i guess its a new problem so ill let everyone know what it is once i fix it to help others down the road

I'll see if I can find that in my gm service manual, if I find a diagram I'll post a scan of it.

There should be resistance to the gauge because the sending unit is basically a rheostat that changes the resistance sent to the needle as the fuel level changes. Myself if it's not a loose wire I believe it's the sending unit but I'll send you the problem diagnosis, gauge cluster wiring diagram and sending unit replacement anyway.

The pdf files are too big for the forum so pm me your email or drop me a line at nault31@gmail.com