1986 Chevy P30 Motorhome Fuel Gauge Wiring
 

I change out the ignition switch on the old motorhome on my 1986 Fleetwood Bounder. This is a GM/Chevy P-30 truck chassis.

After I was done, I notice the fuel gauge now reads empty. Removing the sensing wire from the back of gauge makes it read full.

So, it appears I have a short towards the fuel sender somewhere. The wire is 'pink' at the gauge. I followed as far as I could towards the fuse block and then it disappears.

I don't if anyone has experience with this on a motorhome, but thought I'd ask anyways

Bart

Re: 1986 Chevy P30 Motorhome Fuel Gauge Wiring
 

That pink wire should go thru the C100 connector on the firewall, this is the big connector thats on the back of the fuse block. After it goes thru that connector it goes under the truck and runs along the frame to the fuel tank.

Based on your description, the fuel gauge sender wire is grounding out somewhere along its run. Not an easy problem to trace, you could start with unplugging the C100 connector to isolate whether the problem is in the cab or in the run to the tank. I'd start under the dash seeing as that is where the problem started, when you disturbed the steering column. Did you remove the column? If you did, maybe the wire is pinched on the column mounts.

Re: 1986 Chevy P30 Motorhome Fuel Gauge Wiring
 

yup must be a sending short
can you reach the top of the sender to remove /check/replace the sender wire
some trucks(my jimmy) i've seen a stock join connection along the frame rail
could be about the right length for a pickup,then the second piece added