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Where is the fuel pump relay on 1988 gmc suncrest rv

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 491 Answers

SOURCE: 1988 ford f150 fuel pump relay location

inner driver side fender well along with the eec relay

Posted on Feb 02, 2009

cortez_marco
  • 58 Answers

SOURCE: 1988 ford f-350 econooline cube van not getting power to fuel pum

The fuel pump relay switch is located on the firewall, behind a plastic cover. It is a black plastic 1 inch by 1 inch switch with a four or five wire plug. It is designed to operate the fuel pump for 3 to 8 seconds when you turn the ignition switch on to prime the injector rail hope u find it

Posted on Feb 18, 2009

Molson02536
  • 3854 Answers

SOURCE: 2003 GMC Yukon - fuel pump

Check your ECM fuse. There should be 2 fuses for your ECM. It's the ECM that controls the function of the fuel pump. Good luck friend and it's also common for the wire harness from the frame to the fuel pump to go bad due to corrosion from the bad weather we get in the winter and rainy spring and fall. 

Posted on Sep 04, 2009

  • 12104 Answers

SOURCE: 1997 Gmc Sierra fuel pump relay has no power

check fuse and fuse panel connections

Posted on Oct 29, 2009

  • 8404 Answers

SOURCE: How to change a fuel pump in a 1996 Gmc Sonoma

drop the tank ... use a brass punch to loosen the ring ... to find/replace the pump.

the relay is operated by the computer ...

Check for volts on the outgoing side of the relay ...

check for signal on the input side

check the pressure regulartor ...

If you are still interested ... there is lots more to this. If you are getting weak knees ... remember after you drop the tank and remove the fuel pump ... you are stuck

Posted on May 02, 2010

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fuel pump , fuel pump relay on fire wall, fuel filter, may all need replaced, pump in tank, inspect all wiring in this circuit, especially all grounds,, grounds get overlooked & that is sometimes the problem. I have a 1988 gmc 2500, I 'm talking from experience. can you hear if fuel pump runs for 2 seconds, when you turn key on ? if not, ground problem or pump problem. relay has a fuse in it, check that. check all fuses. NOW, spark ! coil ? plug wires ? distributor cap & rotor ? replace them if you haven't !!!!!!!!!! get to work, see how you do ! good luck !

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Egine not getting fuel


Couple of things, when you turn the ignition key to the run position, you should here the fuel pump "hummmm" for roughly 2 to 5 seconds.
If you can not here the pump run, check the fuel pump fuse under the hood.
If that is OK, find the fuel pump relay in the same fuse box and swap it with another relay that looks just like it and try to start.

Also, there is a fuel pump prime wire located up near the brake master cylinder or firewall area. It is a single gray wire with a RED connector on it. If you jumper battery voltage to that wire, you can run the pump.
Good luck, let me know.
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