Trying to get the fuel guage working again. I accidentally wired it wrong and I'm sure I shorted the ground wire for the fuel temp sensor and the fuel level sensor. I'm trying to trace down where this ground goes. From the diagram that everyone uses for the relay addition, it says it goes to ecu. I looked through the wiring diagram and maybe I'm just not understanding something because I just cannot figure out where to look. There are no fuses popped. I tested the fuel level wire to a body ground and I get voltage , when I test it to the ground wire for those sensors I get nothing. Where's does this ground wire go? I got 50$ cashapp for whoever can help me figure out this issue.

 

Blk/Yellw = To Fuel pump relay.
Red/Blk = To Unified Meter & AC Amp
Gry/Red = To ECU (107)

 

So it changes from black/red to red/black at the plug upfront on the main harness that runs by the drivers seat? Also , how does the secondary fuel level sensor tie into this equation?

 

Here is the sub..

Red/blk = fuel sensor ground. To ac amp.
white/blk = fuel sensor. To ac amp.

and yes, the wire color changes.

 

Have you had any luck with this? I'm currently having a similar issue.

 

Yeah i ended up wiring a new ground to the ac amp. Got my fuel guage back but temp sensor still buggy. It quit immediately throwing a code and just stays in pending. Been such a pain in the butt.