Fuel System Help

Kilroy101 · #1 07-27-2005, 11:37 PM

I've got a 1990 S15 Jimmy. The fuel is not pumping. I checked the harness at the fuel tank connection with a circuit tester and there is no power. I checked my Haynes manual but there is no wiring diagram for the fuel system. Can anyone give me any ideas on what the problem could be or a wiring diagram of the the fuel system?

BlazerLT · #2 07-28-2005, 11:54 PM

Should check the fuel pump relay.

Kilroy101 · #3 07-29-2005, 06:15 PM

Quote:

Originally Posted by BlazerLT

Should check the fuel pump relay.

Please forgive my ignorance but, where is it located?

BlazerLT · #4 07-29-2005, 10:13 PM

Should be oe of the two located on the top of the firewall.

Kilroy101 · #5 07-30-2005, 02:18 AM

I'll check it out! Thanks!

Kilroy101 · #6 07-31-2005, 08:52 PM

I put on a new relay and it still won't pump fuel.
I also noticed that I don't have any headlights and running lights either.
Any suggestions/ideas?

drdd · #7 07-31-2005, 11:03 PM

u got any electricity?

Quote:

Originally Posted by Kilroy101

I put on a new relay and it still won't pump fuel.
I also noticed that I don't have any headlights and running lights either.
Any suggestions/ideas?

Kilroy101 · #8 08-01-2005, 12:07 AM

I've got power to the blower motor but, the radio, courtesy, cargo, and all of the other lights are not working at all.

The engine even cranks!

I've checked all of the fuses and the wiring but, I can't find anything wrong.

BlazerLT · #9 08-01-2005, 02:05 AM

hold on, check the battery voltage.

Kilroy101 · #10 08-02-2005, 05:48 PM

Everything else works fine, power door locks, windows etc. The engine cranks great except it can't start because the fuel is not being pumped.

The battery is brand new and has 13 volts.

The following are not powering up: Head and running lights, glass hatch power release and the fuel pump.

I have checked all of the fuses and the wires and I can't find anything wrong.

BlazerLT · #11 08-03-2005, 01:30 AM

Check your fusible links near the battery.

Kilroy101 · #12 08-03-2005, 12:53 PM

All of the fuse links are good too.

Any one have a wiring diagram?

I'm wondering if I've missed looking at some wires or something.

BlazerLT · #13 08-03-2005, 04:56 PM

ok, there might be a fuse in the fuse panel for the fuel pump.

Kilroy101 · #14 08-03-2005, 05:38 PM

I went through the fuse panel again and checked all of the fueses and they're all good.

The lights, windshield wipers, rear hatch (glass electric release) and the fuel pump are the only things not getting any power.

I can't figure this out!

BlazerLT · #15 08-03-2005, 11:49 PM

Ignition switch.

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