Electric Fuel Pump Relay - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1-PU70 · 09-05-2020, 12:14 PM

Im Installing an electric fuel pump with a relay. The pump will be mounted on the frame by the original in cab tank. My question is where have you been mounting the relay. I can mount on the fire wall or by the pump or by the battery.
Thanks Gary

**Ironangel** · 09-05-2020, 01:08 PM

I mounted mine on the firewall next to the heater box. I routed the 10ga. red wire over the heater box and then forward across the top of the inner fender to the breaker fuse, and then from the breaker fuse to a positive terminal block. I mounted the breaker fuse and terminal block to the fender right next to the black factory terminal block. The instructions for my fuel pump indicated locating the breaker fuse close the battery and the pump as close and lower than the tank. Locating the relay someplace between the two out of the way of rain and road spray. I ran my yellow trigger wire right off the keyed 12 volt power spade on the fuse block. I also added a switched power supply to a toggle switch in the dash.

**dmjlambert** · 09-05-2020, 03:08 PM

I recommend adding an oil pressure shutoff switch for the fuel pump relay, to cut it off in the event of a collision or other problem that stops the engine.

HotWheelsFan · 09-05-2020, 03:19 PM

I agree with the oil pressure cut off. Should be easy to install.

Bob

gmc684x4 · 09-05-2020, 05:37 PM

Ron francis has a inertia cuttoff switch

https://www.ronfrancis.com/prodinfo.asp?number=CR-92

**HO455** · 09-05-2020, 05:49 PM

I used one of these.

https://www.revolutionelectronics.co...Fuel_Pump.html

https://67-72chevytrucks.com/vboard/...=698377&page=6. Scroll to post 127 and below.

As far as the relay mounting look for some place dry, with good visual access, for when you have to replace it along the road on a dark and stormy night.

09-05-2020, 12:14 PM	#1
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Electric Fuel Pump Relay Im Installing an electric fuel pump with a relay. The pump will be mounted on the frame by the original in cab tank. My question is where have you been mounting the relay. I can mount on the fire wall or by the pump or by the battery. Thanks Gary __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

09-05-2020, 01:08 PM	#2
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Electric Fuel Pump Relay I mounted mine on the firewall next to the heater box. I routed the 10ga. red wire over the heater box and then forward across the top of the inner fender to the breaker fuse, and then from the breaker fuse to a positive terminal block. I mounted the breaker fuse and terminal block to the fender right next to the black factory terminal block. The instructions for my fuel pump indicated locating the breaker fuse close the battery and the pump as close and lower than the tank. Locating the relay someplace between the two out of the way of rain and road spray. I ran my yellow trigger wire right off the keyed 12 volt power spade on the fuse block. I also added a switched power supply to a toggle switch in the dash. __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"

09-05-2020, 03:08 PM	#3
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,859	Re: Electric Fuel Pump Relay I recommend adding an oil pressure shutoff switch for the fuel pump relay, to cut it off in the event of a collision or other problem that stops the engine.

09-05-2020, 03:19 PM	#4
HotWheelsFan Registered User Join Date: Mar 2010 Location: Oregon Posts: 189	Re: Electric Fuel Pump Relay I agree with the oil pressure cut off. Should be easy to install. Bob

09-05-2020, 05:37 PM	#5
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Electric Fuel Pump Relay Ron francis has a inertia cuttoff switch https://www.ronfrancis.com/prodinfo.asp?number=CR-92

09-05-2020, 05:49 PM	#6
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,351	Re: Electric Fuel Pump Relay I used one of these. https://www.revolutionelectronics.co...Fuel_Pump.html https://67-72chevytrucks.com/vboard/...=698377&page=6. Scroll to post 127 and below. As far as the relay mounting look for some place dry, with good visual access, for when you have to replace it along the road on a dark and stormy night. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

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