1980 F250 7.3 idi swap electrical question

Theaxehand · Jun 1, 2023

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I dropped a 7.3 idi with factory turbo in my 1980. I know what I need to do the make the engine work, I am not sure what I need to do for the charging system. How do I adapt the newer alternator (93 engine) to the older truck? Any input is greatly appreciated! Thanks!

hacked89 · Jun 1, 2023

Can you confirm what engine harness you are currently using from the 1980?

IDIBRONCO · Jun 1, 2023

My guess on the alternator is that it's a 3G swap. There's been threads on doing this and some have some pretty good pictures. I do have to admit that most of us only swap the alternators while doing this. Not the entire engine. ;Poke

Theaxehand · Jun 1, 2023

hacked89 said:
Can you confirm what engine harness you are currently using from the 1980?

Was originally a 351m truck.

Theaxehand · Jun 1, 2023

IDIBRONCO said:
My guess on the alternator is that it's a 3G swap. There's been threads on doing this and some have some pretty good pictures. I do have to admit that most of us only swap the alternators while doing this. Not the entire engine.

I prefer the path of most resistance, it forces me to learn more.

hacked89 · Jun 1, 2023

Theaxehand said:
I prefer the path of most resistance, it forces me to learn more.

Hey youre taking it easy by merging with the 351M harness ;Poke

I can look at a diagram for the 351 80 harness late tonight or tomorrow if someone doesn’t respond by then

Austin86250 · Jun 2, 2023

So factory turbo I’m presume the motor is serpentine meaning it’s a 3g style so 4 wires, let’s see how well I remember colors

Yellow- charge post
Green- 12v key on
White- little plug next to voltage regulator
Charge wire- battery I use 4 gauge

I used the 12v key on that supplies the 80’ voltage regulator that’s on the wheel well so you may delete on the voltage regulator and corresponding wiring

1980 F250 7.3 idi swap electrical question

Theaxehand

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hacked89

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IDIBRONCO

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Theaxehand

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Theaxehand

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Austin86250

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