fuel pump relay test?
#3
this will show you how to test the system at teh relay
http://mainstreamtopics.com/forum/in...p?showtopic=78
Fuel system electrical diagnostics
First we need to get at the fuel pump relay. here is a picture of it http://shbox.com/1/fuel_pump_relay.jpg *note 93-95 and 96-97 systems are slightly different.
With your test light at the relay test for ground on the black/white wire. Do you ahve a ground?
Yes, contunie to next step
no, repair ground wire.
Next with your test light and the key in the Key on engine off (KOEO) position test for hot into the relay at teh orange or pink wire depending on year. do you have hot?
yes, continue to next step
No, check iner panal and fuse panal fuses and replace any bad fuses and recheck
next check for hot on the Dark Green and white wire while cranking. This is a hot from the PCM to trigger the relay. do you have hot?
yes, continue
no, check wire back to PCM. if still not hot directly out of teh PCM possible faulty PCM.
if you have all hots and ground at teh relay next check the function of the relay itself. do this by checking for hot at the gray Wire with your testlight with the engine cranking. Do you have hot?
yes, relay and wireing is working correctly. veryify battery voltage with a Multi meter
No. unplug relay. with key on engine off use a fused jumper wire to aplly voltage from the pink or orange wire terminal to the gray wire terminal and recheck for hot at the gray wire. if you have hot replace the relay and recheck gray wire with the relay pluged in
http://mainstreamtopics.com/forum/in...p?showtopic=78
Fuel system electrical diagnostics
First we need to get at the fuel pump relay. here is a picture of it http://shbox.com/1/fuel_pump_relay.jpg *note 93-95 and 96-97 systems are slightly different.
With your test light at the relay test for ground on the black/white wire. Do you ahve a ground?
Yes, contunie to next step
no, repair ground wire.
Next with your test light and the key in the Key on engine off (KOEO) position test for hot into the relay at teh orange or pink wire depending on year. do you have hot?
yes, continue to next step
No, check iner panal and fuse panal fuses and replace any bad fuses and recheck
next check for hot on the Dark Green and white wire while cranking. This is a hot from the PCM to trigger the relay. do you have hot?
yes, continue
no, check wire back to PCM. if still not hot directly out of teh PCM possible faulty PCM.
if you have all hots and ground at teh relay next check the function of the relay itself. do this by checking for hot at the gray Wire with your testlight with the engine cranking. Do you have hot?
yes, relay and wireing is working correctly. veryify battery voltage with a Multi meter
No. unplug relay. with key on engine off use a fused jumper wire to aplly voltage from the pink or orange wire terminal to the gray wire terminal and recheck for hot at the gray wire. if you have hot replace the relay and recheck gray wire with the relay pluged in
#4
Re: fuel pump relay test?
#5
Re: fuel pump relay test?
LH rear seat means left hand (driver's side of car) rear seat. The fuel pump connector is not inside the passenger compartment, it is, as Shoebox indicates, on the underside of the car above the rear axle.
Courtesy of Shoebox:
Courtesy of Shoebox:
Last edited by Injuneer; 02-19-2017 at 04:20 PM.
#6
Re: fuel pump relay test?
How would i get direct power to the fuel pump? I dissconnected the fuel lines. And i turn the igniton on and it does no squirt any fuel out. Is that a sign of a bad fuel pump or am i missing something??
#7
Re: fuel pump relay test?
To test the fuel pump directly with 12 volts, bypassing the relay, connect 12 volts to the fuel pump prime connector, near the computer.
You also need to tell us about your car - year, model engine, and trans type. Not all these cars are identical.
You also need to tell us about your car - year, model engine, and trans type. Not all these cars are identical.
#8
Re: fuel pump relay test?
1996 Camaro Z28 5.7 Automatic trans . I just just recently purchased the car and the man i bought it off of had it sitting for 2years. He couldnt get it to start so im starting with the fuel first. Then so on and so
Last edited by Rivas08_02; 02-19-2017 at 08:26 PM.
#9
#12
Re: fuel pump relay test?
Do i get the 12volts from the car battery???
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