Looking for firewall connector pinout
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Cross-Country
Joined: Nov 2015
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Looking for firewall connector pinout
Im currently swapping a blown 7.3idi to a 4.9 efi. The truck is a 1990 f350 and the motor and wires for the 4.9 is from a 92 f150. I want to know if anyone has the pinout for both years for the circle firewall connector. Or if anyone knows if the wiring will match up between them or if I need to swap some pins around ect. I appreciate any guidance you can give me on this.
Hotshot
Joined: Jun 2015
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The wiring is going to be completely different. You should be able to find the pin outs using the search function. You are aware that the 4.9L will not bolt up to the diesel transmission? I’m not trying to talk you out of it but that truck is going to have trouble getting out of its own way.
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Cross-Country
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I double checked and I had my info wrong. The motor is from a 90 and the trucks sticker says 10/89. I don't know if that late in the year it makes it a 90 or if it's still considered a 89. If they are the same year do you think it would match up even with different motors?
Hotshot
Joined: Jun 2015
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It should be a ‘90 with that build date. Is the emissions sticker under the hood? What letter is in the VIN? 1990 to 1990 should be plug and play from what I understand. ‘89 to ‘90 not so much. I don’t know if being a diesel and not gas to gas would change anything
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Cross-Country
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When I get time I'll go out a look at it. I'll probably just plug it in and hope for the best lol
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Hotshot
Joined: Jul 2020
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From: Near Salt Lake City
Buy an EVTM for both trucks or visit the library for their AllData that you can use / print diagrams for free
You will need every page of both EVTMs most likely
C100 (the bulkhead connector) is listed but no page diagram for it in a 1990 EVTM
All Data is your friend on this one to go through their wiring diagrams and print them (about 100 of them individually)
The EVTM shows a 54 pin connector but no diagram for it
You will need every page of both EVTMs most likely
C100 (the bulkhead connector) is listed but no page diagram for it in a 1990 EVTM
All Data is your friend on this one to go through their wiring diagrams and print them (about 100 of them individually)
The EVTM shows a 54 pin connector but no diagram for it
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
1990 C202 Pin-Out diagram courtesy of Subford:
Clipped from this thread: 1989 460 bulkhead pinout help
I am aware the thread topic is asking for a 1989 diagram, but Subford stated the diagram is for a 1990 model year truck.
Clipped from this thread: 1989 460 bulkhead pinout help
I am aware the thread topic is asking for a 1989 diagram, but Subford stated the diagram is for a 1990 model year truck.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
No idea without comparing a gas engine versus a diesel EVTM page by page, but it does appear Subford did label the diesel specific pins as well as gas engine. That implies there were no pin changes based on a gas versus diesel engine.
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