i needc to know which relay is for the fuel pump.. i get two different wire combinations from different people

one guy says

"Remove the fuel pump relay, but keep the harness connected. This is
____located on the top of firewall, driver's side, on a relay bracket. It's the leftmost
____relay, with a connector that has these wires: Tan/white, black/white, green/white,
____orange, orange. "

another says
"Here's how to identify the fuel pump relay. It has the following wires going to it:

ORG
TAN/WHT
GRN/WHT
BLK/WHT
RED

The ECM tells the fuel pump to prime."




who is correct? i need to know to check the wires on the circuit..

 

Just pull one out and see if the car starts and keeps running. The one that doesnt let the car run is the fuel pump relay.

 

Pull out a couple of relays that you think might be the right one and use a jumper wire across the larger terminals on the harness with the key 'on' and engine off. Listen for the pump.

It's easy to move them around so the relays might be in a different order from what a manual says.

Laters,
Scott

 

The oil pressure switch will keep powering the fuel pump so the car doesn't die. It will have to be unplugged as well (located just about the oil filter).

 

the car will not even start.. im trying to figure out what it is.. a short .. relay/. when i turn the key to on to hear the fuel pump prime it does not... in addition to not hearing the pump prime if i leave a certain relay in the 20 fuse near the batter will pop as soon as the key is turned. that is why i ask the correct combination of wires to the relay to help myself better trouble shoot why my pump will not prime and will blow the fuse thats why i need to kmnow what the relay is to trouble shoot the wiring..
also if the MAf is burned out or one of the maf relays will that cause that 20 amp ecm fuse to blow near the battery?

i check ed the battery and alternator.. the battery was fine.. the alternator is faulty.. i dont really think that would cause that fuse to pop but you guys know more than i do.... out of 4 birds only one ever had a starting problem that i couldnt figure out..

im stumped..

 

where ecactly is it ? i get two responses on this too..
i have an 86 trans am 305 tpi currently.. i thought i seen on my notchback but i didnt think i saw one when i was looking at this one.. could this be the year that it is by the distributor?


also if this switch failed or lost a wire would it blow the fuse? (grounded wire or what not)

 

remember to check the fuse by the battery in the passenger fender, b4 u do the relay, i just had a problem where my pump wouldnt turn on and changed the relay, but nothin, and it was the fuse.... my post is in the eletrical

 

That's his whole problem Jay, the fuse you are talking about keeps blowing.

 

ahhh i c i am sorry , g/l with that

 

Have you checked the wiring by the ECM for shorts?

I had Lo-jack installed in my car awhile ago and the installer did a **** poor job connecting the lo-jack to the ECM.

He ran a power wire under the passenger side door sil and didn't enough length so instead of running a new wire, he just got another piece and connected the two together with electrical tape. It finally contacted metal and kept blowing that fuse.

Scott

 

Hello Scott,

Your mentioning the Lo-Jack system reminded me of a guy down in Miami, Florida who had that system installed in his nice shiny new porsche. He came out the next morning and found the Lo-Jack system sitting in the parking spot where he had parked the porsche. The car was never found. Hope this doesn't happen to you.

 

LOL! Me too!

Sounds like it was an inside job too me.

At least he knew where his lo-jack was

 

how do i check for shorts with a voltmeter?

 

I think you need to have the volt meter connected to both ends of the wire. Any break will show up as no voltage.

 

Have the meter set to OHM's to show continuity. This how to determine a break in the line.

 

If you disconnect connecters in a circuit you can narrow down where the short is located. When you get to a connecter that doesnt blow the fuse you have a problem between that connecter and the ground side of the circuit.