Tbi swap build thread - The 1947 - Present Chevrolet & GMC Truck Message Board Network

glock35ipsc · 09-08-2009, 12:21 PM

Jamie, rfmaster, or anyone else......

I am in the middle of a 5.3L Vortec install in my 85, which prior to this had been converted to TBI with parts from a donor 87.

I am trying to find the wire that runs from the firewall to the pumps, the wire that actually powers the fuel pumps. Is it the tan/white wire that comes from the relay that powers the pumps? What about power for the tank selector switch, is it from the same wire?

I have a signal wire that comes from the 5.3's PCM that will turn on a relay. I just need to find the wire that goes to run the pumps now.

09-08-2009, 12:21 PM	#8
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,684	Re: Tbi swap build thread Jamie, rfmaster, or anyone else...... I am in the middle of a 5.3L Vortec install in my 85, which prior to this had been converted to TBI with parts from a donor 87. I am trying to find the wire that runs from the firewall to the pumps, the wire that actually powers the fuel pumps. Is it the tan/white wire that comes from the relay that powers the pumps? What about power for the tank selector switch, is it from the same wire? I have a signal wire that comes from the 5.3's PCM that will turn on a relay. I just need to find the wire that goes to run the pumps now. __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 09-08-2009 at 12:27 PM.



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