Hi all, Since I have now sorted some of my issues out, 4WD now working properly, P0104 error sorted etc. I would like to sort out the fuel gauge issue. It always reads empty with the low fuel light warning light on. I've checked the fuel gauge diagnosis page and guess it's probably a ground problem. However I've also noticed the oil pressure gauge doesn't return to zero when ignition is off, or when gauge fuse is pulled, but does return to zero when engine starts and then reads normally, again, ground problems I guess ?
Anyway, does anyone have wiring diagrams for the fuel gauge circuit and the whole gauge cluster circuit (haynes has nothing in their manual). I'm sure it would be easy to sort out once I have a daigram.

Thanks.
PS 1999 Blazer 4.3 (RHD UK Spec)

 

These should help:

 

Brilliant, many thanks.
Will report back when I locate fault.

 

I was wondering if you ever found a solution to this problem? I am having the same problem with my Blazer as well, and it really is getting annoying. If you could make some suggestions that would be great. Thx.

 

Iput a new fuel pump in, now my tank always shows empty. I checked the wires, it is hooked up right. Any suggestions on what i should do?

 

Assuming that the gauge worked correctly before the pump swap, I would have to say that you did something incorrectly. There is a Tech Article on gas gauge diagnosis that will run you through the checks.