Wiring old Harness / misc wiring to get motor running for me was confusing. Looking back its pretty simple.... but heres the details. Maybe it will help someone.
Guess I should mention I’m utilizing a Howell Harness and ECM. Ordered it through
@FJ60Cam He took care of it and made sure they were dialed in for this motor. Made it simple. I’d highly recommend utilizing Cam for any of the services / parts / builds he supplies. He is a wealth of knowledge when it comes to these trucks.
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Wires I’m utilizing off old harness
Driver Side
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-Coolant Temp Sensor Wire
-Brake Fluid Resevoir Plug
-Headlight, Blinkers, Horn
Passenger Side
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- + Harness Terminal Wire / Wires
-Coil + Wire
-Washer Fluid Reservoir Plug
-AC Compressor Wire
-Starter Wire
-Charcoal Canister Plug
-Activated Reverse Light Plug
-Transfer Case Plug
-Oil Pressure Sender Wire
-Headlight, Blinkers, Horn
Coming off The old FJ + terminal I had one wire that linked / spliced into 3. Red, Black, & White.
White wire was about 12” long and ran to alternator lug. I deleted the white wire.
Red & Black run through Firewall. Kept both.
Here is old alternator. The Lug and red capped plug house 4 wires total - (including the white one mentioned above. I deleted all of them.
The red & Black were soldered to a single fusible link and ran to the + batt terminal.
Next up is full time power to fuse block. Ran the wire to the Vortec Alternator Lug. Pretty sure this could be ran to a power block if your motor has one or directly to battery.