The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Wiring fuel pump circuit with Oil Pressure switch and relay questions

chefk85 · 04-10-2018, 06:19 PM

I intend to use both and i think an inertia switch is also a good idea i will get to a little later. Going to get the truck running properly first. So the relay kit i have is a 5 pin that utilizes 4 of them. 30 is main batt power(with circuit breaker between it and batt), 87 is fuel pump power, 86 to ignition switch, 85 is ground. 87a has no wire coming from it.

So as far as my tiny electrical brain can tell this should work per your diagram...I will start with connecting fuel pump and ground and check back to make sure this is correct with your thoughts before wiring oil pump switch.

I will run the wires along top of fire wall. Is this purple wire(solenoid wire?) then not needed? I would run a new wire to solenoid from OP switch?

04-10-2018, 06:19 PM	#8
chefk85 Registered User Join Date: Jun 2015 Location: Bellevue, Id Posts: 173	Re: Wiring fuel pump circuit with Oil Pressure switch and relay questions I intend to use both and i think an inertia switch is also a good idea i will get to a little later. Going to get the truck running properly first. So the relay kit i have is a 5 pin that utilizes 4 of them. 30 is main batt power(with circuit breaker between it and batt), 87 is fuel pump power, 86 to ignition switch, 85 is ground. 87a has no wire coming from it. So as far as my tiny electrical brain can tell this should work per your diagram...I will start with connecting fuel pump and ground and check back to make sure this is correct with your thoughts before wiring oil pump switch. I will run the wires along top of fire wall. Is this purple wire(solenoid wire?) then not needed? I would run a new wire to solenoid from OP switch? Attached Images __________________ http://67-72chevytrucks.com/vboard/s...25#post7532025 71 Cheyenne K10. 283/Th350/NP205. 3.07s non posi. 31x10.5 Bighorns.L31 350 Vortec swap in progress. 79 Suburban K20. 350/350. 6" lift. 35x12.5 Toyos. 93 Burb K1500. 350/4l60e Parting out. 2001 Tahoe LT, 5.3, autoride, 265/75s, leather, loaded, family hauler, 243k miles!