So I'm ready to get my fuel pump wiring done, I need to hook up the wire that turns on the fuel pump. I took apart the relay center and got the grey wire but I see an orange and red wire going into the pump relay, I'm thinking that the red wire would be constant power and the orange is switched but I'm not 100% sure.
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95 C1500 LM7, built 4L60e, Circle D 3200, LT's, Nelson tune, open differential, 3.42, and LS1 e-fans. Tractionless
If it helps at all relay 87 is the orange wire 87a is the red wire
95 C1500 LM7, built 4L60e, Circle D 3200, LT's, Nelson tune, open differential, 3.42, and LS1 e-fans. Tractionless
Just guessing. But the grey wire is probably going back to the fuel pump. So that's pin 30. Across from that pin is 87.
85 and 86 trigger the relay coil. So. Touch the green wire on 85 or 86 to power and u should hear the relay click.
Or. If that grey wire is goin to the pump, just apply 12volts to it and the pump will power up. Obviously for testing purposes only.
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well the pump isn't getting power, I tried both the orange and red wire but still nothing. I'm sure it's not the green wire since the relay in the standalone harness already has a green wire coming out of it.
This makes me think that the standalone harness isn't getting any power. Another problem I had was that my starter isn't engaging with the flywheel
95 C1500 LM7, built 4L60e, Circle D 3200, LT's, Nelson tune, open differential, 3.42, and LS1 e-fans. Tractionless
Did you put 12v to the grey wire going to the pump to verify its working?Originally Posted by silverado_lover
I did not but the pump is about 2 months old
95 C1500 LM7, built 4L60e, Circle D 3200, LT's, Nelson tune, open differential, 3.42, and LS1 e-fans. Tractionless
I finally busted out the volt meter but none of the wires are getting power. Shouldn't I be able to tap into any switched power line? The standalone is getting power.
I also checked the starter issue...it is indeed engaging with the flywheel
95 C1500 LM7, built 4L60e, Circle D 3200, LT's, Nelson tune, open differential, 3.42, and LS1 e-fans. Tractionless
old thread, i know.... but I am having the same problem and was wondering if / how you resolved the problem. everything seems to work as it should but the damn thing won't fire because of the lack of power at the fuel pump.
I don't know what year truck you have but i didn't connect the wire from fuel pump to oil pressure sensor like the factory had it and my fuel pump wouldn't work 1992 chevy pickup.Once i connected that wire everything was good.
the oil pressure sensor is unplugged at the moment. i forgot to pull the one off of my old engine. will that matter?
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