I am replacing the cab on my 94 f350 with one from a 95 f150.The pcm is different so I am going to swap that.I am looking for a wiring harness pinout/diagram to see if it also needs to be swapped over.
original truck :1994 f350 5.8 e4od 4x4 speed density
replacement cab :1995 f150 5.0 e4od 2wd mass air

Replacement

 

You're going to be better off stripping the '95 cab bare, all the engine wiring is different and there may be more under the dash that doesn't match, it will be a headache to figure out what matches and what doesn't between the two cabs so it's probably a lot quicker to just swap it all.

 

Yes you are probably correct.I am just hoping it would be a plug and play.

 

If i buy a haynes or chilton manual will they have the pinouts?

 

OK I'm going to go the opposite direction.

My Chilton's shows 94 & 95 as the same diagram, so don't count on that.

The only major difference in the two E4 wiring is the location of a diode that controls the trans. (and the mass air on your donor)

It's in the solinoid pack in 94 & in the PCM for 95.

Yes, Ford likes to change things capriciously.

Best thing if you want to do the swap & move the harnesses, is get a disc on ebay for each year.

But a Chilton or Haynes is going to show them as mostly the same.

How good are you with wiring & electronic control?

Here's a thread I did on my mass air conversion from 5.8/SD to Mass Air from a 5.0 that shows some of the diagrams you're looking for:

https://www.ford-trucks.com/forums/1...l#post17863990

 

Difference is the trailer wiring as in 1994 it passed through C202 & C205 and in 1995 it did not, pins #12 & #13 for C202.
Also there was difference with pins 64, 65 & 76.




/

 

And there you go.

Did you get anything wiring wise from the 95 or did you get a bare cab?

Should have asked that first. Sorry.

 

The 95 came as a complete cab.

 

Thanks for the help.There are enough differences that I will pull out the dash and swap harnessses.Luckily my 94 harness looks like it survived the cab fire.

 

Keep us updated.

 

My apologies for hijacking this thread - I can start a new one if the OP protests. But I have been keeping an eye on this one specifically because of some wiring anomalies I have had in my truck since swapping the dash and cab wiring.

My truck is a 1994 F150 5.0 M5OD Speed density. I recently swapped in the dash, door, and cab harness wiring from a 1995 F150 with auto transmission. I did it to get power mirrors along with factory keyless/anti-theft. The donor truck was definitely an automatic with push button 4x4 but I do not know the engine or specific transmission. Everything works flawlessly in my truck, but when I use my turn signals I get a red light error from my trailer brake controller, regardless of whether or not I have a trailer connected. The lights all work as they are supposed to trailer connected or not, but the controller will always flash at me to tell me something is up. I used to think it was just a glitch in the matrix, bit now I am seeing this and wondering if there is something that needs to be re-pinned.

Another thing - when I hit the lock button on the keyfob twice in succession, it will beep the horn and flash the front lights, but not the rears. All the other OBS trucks I have seen will flash the rears as well. Could this be related to the wiring differences seen above?

Thanks in advance.

 

The power for flashing the rear goes through C205 pin #23 (wire #14 BR).
But this is the same pin that turns on the rear lamps with the head lamp switch.

Does your front parking lamps flash?

 

Yes. Only the fronts flash.

 

Does the rear lamps light up with the headlamp switch?

 

Yes, they work fine on the headlamp switch as do all the other lights. I went out to double check everything just to make sure. To add to the mystery, the license plate lights do flash, but the tail lamps do not. Just noticed the license plate lamps flashing today.

Other things to consider - the bed was a replacement from a 97 F350 and I am pretty certain my current tail lamp harness came with that bed - any wiring differences in the tail lamp harness from 94-97 that could cause it? I also run LED's with resistors on rear turn signal/brake wires. Everything operates as it should. Cruise control works. Turn signals, brakes, and all front lights light up properly when expected to.