Fuel Pump relay?

Tiny
GBERRIER
  • MEMBER
  • 1995 OLDSMOBILE CIERA
Electrical problem
1995 Oldsmobile Ciera 4 cyl Front Wheel Drive Automatic

I think I have a fuel pump relay problem but I am not sure where it is. I found a row of 5 relays behind the right headlight and two to them are the correct type but I am not sure if either are the fuel pump relay. I have replaced both of those with no success. Where is the fuel pump relay located?
Thanks
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Wednesday, August 12th, 2009 AT 9:11 PM

26 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
On relay bracket, in the right front corner of engine compartment.


https://www.2carpros.com/forum/automotive_pictures/261618_Graphic_105.jpg

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Wednesday, August 12th, 2009 AT 10:49 PM
Tiny
ROADHOUSERED
  • MEMBER
  • 1 POST
  • 1994 OLDSMOBILE CIERA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 51,300 MILES
Where is fuel pump relay switch located
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, underhood, passenger side front, relay pack. I don't know if you can read that? It's number 3, relay closest to radiator. Double check by looking at the wiring colors at the connector. red-- gray-- orange-- dark green wire with white tracer-- black wire with white tracer.


https://www.2carpros.com/forum/automotive_pictures/170934_ciera_S_fuel_pump_relay_1.jpg

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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
CORZINERYAN
  • MEMBER
  • 2 POSTS
  • 1994 OLDSMOBILE CIERA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 142,000 MILES
I had the fuse llocated by the fuel pump relay replaced and a circuit breaker as well. My car sat all winter and now won't start. The fuse by the fuel pump relay was blown so I replaced that, so I can't tell if the circuit breaker is bad because I can't locate it.
Thanks,
Ryan Corzine
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
Is that model year correct? Use a gage and check fuel pressure. With fuel injection, the pump maybe in the tank? I want to check voltage and ground at the pump connector, proper terminals, before deciding anything.
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
CORZINERYAN
  • MEMBER
  • 2 POSTS
I resent the correct year and model and its not a four wheel drive I'v had the fuel pump replaced as well as all other fuel pump components. It quit running about two years ago. All that was wrong with it was a bad circuit breaker and a blown fuel pump fuse near the fuel pump relay.

Thanks,
Ryan
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
CRAIGZLC
  • MEMBER
  • 1 POST
  • 1994 OLDSMOBILE CIERA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
I ask a question yesterday and got a reply and now im wondering out of the 3 relays left of the radiator whitch one ic fuel pump relay. And when car is working can I turn the acc on and get under car and here fuel pump. How can I check fuel pressure.
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
GRUMPYTIM1
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Left of the plenum towards the back of motor u'll find a black screw on cap unscrew and theres a bleeder there. Works like a valve stem on a tire connect pressure gauge there
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
GRUMPYTIM1
  • MEMBER
  • 3 POSTS
  • 1993 OLDSMOBILE CIERA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 11,000 MILES
3.3 died while driving low speed. Tested fuse?= Good relay? = Good ( replaced with one that tested good) spark? = Yes pulled plug at the tank and jumped it and pump ran and car runs great when jumped.I have Power at injectors NOW WHAT? I'm lost !
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
JDL
  • MECHANIC
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Welcome to the forum. My info shows an oil pressure switch in the fuel pump circuit parallel to the relay. Once you crank it enough to bring up oil pressure and the switch closes, the pump should run regardless of the relay. I'd check the ecm fuel pump fuse, should be located close to the fuel pump relay, underhood, passenger side front. There should also be a fuel pump test connector in that same area.
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
GRUMPYTIM1
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Fuse is good no power @ the plug I dunno
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you use a testlite to see if the fuse circuit was hot? The prime connector should be close to relay, it is usually red or gray wire, with connector, nothing plugged into it, if you use a jumper wire and run battery voltage to the connector the pump should run. That circuit is a test connector for the pump, you don't use the key. Then you can check for voltage and ground at the pump.
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Thursday, September 24th, 2020 AT 10:58 AM (Merged)
Tiny
FROSSI24
  • MEMBER
  • 2 POSTS
  • 1992 OLDSMOBILE CIERA
  • 160,000 MILES
Car ran great before parked in garage 3 years ago. 92 0lds cutlass ciera 3300 v-6. Told could be fuel pump. How to tell if fuel pump, fuel pump relay, fuel sending unit. Put new spark plugs, starts and runs while spraying starting fluid. When stop spraying starting fluid quits running. Seeking least expensive way to figure out whats actually the problem? Remember, ran and started great until parked for 3 years
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
If it runs on starting fluid, then either you are getting no gas from the fuel pump or you are trying to run the engine on 3 year old gas which won't work.
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
FROSSI24
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  • 2 POSTS
Put 5 gallons of new fuel. Tank was very low when parked
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Was the old fuel left in the vehicle or did you drain it? Have you checked fuel pump pressure to the engine?

If you left the old fuel in there, chances are it will not start.
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
NOTAPROMIKE
  • MEMBER
  • 66 POSTS
  • 1990 OLDSMOBILE CIERA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 242,000 MILES
Fuel Pump Relay is getting no power. When I run a jumper to the red connector at the fuel pump relay and then jump this hot wire to the grey wire connector at the fuel pump relay, the fuel pump runs and the car runs. Is there a fuse before the fuel pump relay? Is it the grey wire that is to be energized at the f.P. Relay and not the red one? Help. Thanks. Mike
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
That should be a 4 wire relay. Use a test light to figure this out.2 wires should have power, one of the others goes to tehpump and the other to theECM (Ground signal). The other one should go to ground when engine is turned on (momentarily) then stay on when running. This vehicle uses an oil pressure switch to interrrupt the fuel pressure to prevent engine damage, so be sure that the oil pressure sender is plugged in and working properly as well. According to my wiring it has a fuse near the starter, but doesnt give an exact location.
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
NOTAPROMIKE
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)
Tiny
NOTAPROMIKE
  • MEMBER
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Thank you. The fusable link was burned out near the starter as you said. Very happy. Thanks. Saved me $$$$$
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Thursday, September 24th, 2020 AT 10:59 AM (Merged)

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