Engine harness bolt together plug swap

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May 20, 2020 | 12:45 PM

Dan Drover

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Engine harness bolt together plug swap

I'm doing an engine swap 300-6 to 351w the 351 has a obd2 harness and the truck is obd1 i have a obd1 harness for the 351 but the bolt together connector on the truck is square and the one for the harness is round.
I'm trying to find a diagram that shows the colours and locations the pins need to be in so I can swap the round plug for the square one. Does anyone have one or know where to find it?
Or would it work to simply colour match the wires on the two sides? As I have yet to see a diagram that shows the bolt through connector.

May 20, 2020 | 01:09 PM

Franklin2

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From: Virginia

Tell us what year and model the truck is, and what year and model the engine you are swapping in is from. On the later models, f150 or f250/350 superduty makes a difference.

May 20, 2020 | 01:12 PM

Dan Drover

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351 came out of 96 f150 going into 93 f150 have the 351 obd1 computer installed in the 93

May 20, 2020 | 01:46 PM

Franklin2

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From: Virginia

On the older trucks, the computer system and wiring was separate from the rest of the truck except for just a very few spots. If you had the obdi engine harness to go with the computer you have, I think you could do it fairly easily.

May 20, 2020 | 02:00 PM

Dan Drover

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Quote:

Originally Posted by Dan Drover

I'm trying to find a diagram that shows the colours and locations the pins need to be in so I can swap the round plug for the square one. Does anyone have one or know where to find it?
Or would it work to simply colour match the wires on the two sides? As I have yet to see a diagram that shows the bolt through connector.

This is what I really need to know
is there a diagram or are the wires the same colour on either side of the plug

May 20, 2020 | 04:17 PM

Franklin2

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From: Virginia

I am not sure what plug you are talking about, but I am sure some of the wires are the same colors and some are different colors. Yes there are diagrams, I don't have access to any for free. You will have to buy them, the best place is ebay.