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norville · 03-26-2023, 07:48 PM

Hey all, I'm almost done with this mess, the PO road killed the heck out of LS swap on this truck. It's an 86 scottsdal with only 80k on it and AC and Ps/pb.

I almost have all of the messed up witing figured out but I'm having a battery drain issue. While sitting I have about a 500mA draw, I figured out that it's the single wire going to my alternator. If i pull the alternator wire out trigger wire, the draw drops down to 5mA..Somewhere along my harness voltage is getting back fed into that line...

Key off wires to my fuel pump and crank circuits are correct, I don't think it's my ignition.

Unplugging the cpu fixes the issue also..lol

This is an ebay special harness, I found one lead as to the issue on LX swap forum, but I'm hoping someone here has also had an issue like mine.

Thanks,
Bob

03-26-2023, 07:48 PM	#1
norville Senior Member Join Date: Jun 2004 Location: Mountain Top, Pa Posts: 323	Odd wiring issue, 8v on my alt Hey all, I'm almost done with this mess, the PO road killed the heck out of LS swap on this truck. It's an 86 scottsdal with only 80k on it and AC and Ps/pb. I almost have all of the messed up witing figured out but I'm having a battery drain issue. While sitting I have about a 500mA draw, I figured out that it's the single wire going to my alternator. If i pull the alternator wire out trigger wire, the draw drops down to 5mA..Somewhere along my harness voltage is getting back fed into that line... Key off wires to my fuel pump and crank circuits are correct, I don't think it's my ignition. Unplugging the cpu fixes the issue also..lol This is an ebay special harness, I found one lead as to the issue on LX swap forum, but I'm hoping someone here has also had an issue like mine. Thanks, Bob __________________ 1986 C10 Scottsdale 5.3, TH400 Last edited by norville; 03-26-2023 at 08:22 PM.