Engine wiring harness question
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Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Engine wiring harness question
I've started looking for a replacement wiring harness for my truck, since I've recently discovered mine has problems (melted IPR plug, messed up wiring for the ICP sensor, and a few other hidden issues). I was looking for the engine wiring harness that comes off the 42-pin connector out to the UVC, glow plugs, IPR, ICP, coolant sensor, CPS, EBP sensor, etc. However, I was informed that a wiring harness from a 99-01 PSD might not work correctly, as there may be a slight difference in the pin-outs at the connector. I know the tach input signal is different for the 02/03 trucks, but I wasn't aware of a wiring difference at the engine harness (I just thought it was a PCM change). I was told I might encounter a few issues, such as alternator charging, coolant temp sensor being erratic, etc.
Does anyone have any info on the differences in wiring harnesses. I would like to get some info before I spend money on snatching one up for my truck.
Does anyone have any info on the differences in wiring harnesses. I would like to get some info before I spend money on snatching one up for my truck.
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
maybe this will help you out..i remember Alan (AMiller) had a hard time getting the right one... numberdummy might be able to help you as well...
https://www.ford-trucks.com/forums/6...e-harness.html
https://www.ford-trucks.com/forums/6...e-harness.html
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Call Ed.
I bought one for my truck already because I know that wiring doesn't last forever.
I'm saving it for the day that I need it.
I've already had to patch the existing one twice.
One was to fix a mistake that I made when playing with a 10k mod many years ago and the other one was to the AC pressure switch.
The wire simply broke apart inside the connector and I had to drive home with no AC on a hot summer vacation.
The new harness wasn't cheap, but having a truck go down while out of town can get a LOT more expensive.
.
But now you have me nervous that I might not have the right one and so I better get it out of the box and make sure.
I bought one for my truck already because I know that wiring doesn't last forever.
I'm saving it for the day that I need it.
I've already had to patch the existing one twice.
One was to fix a mistake that I made when playing with a 10k mod many years ago and the other one was to the AC pressure switch.
The wire simply broke apart inside the connector and I had to drive home with no AC on a hot summer vacation.
The new harness wasn't cheap, but having a truck go down while out of town can get a LOT more expensive.
.
But now you have me nervous that I might not have the right one and so I better get it out of the box and make sure.
Thread Starter
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Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Well I did get an email from another guy that I've been working with on tuning. He told me about the differences in pin-outs at the 42-pin connector. A wiring harness from a 99-01 will not work on my truck. I have to find one from a 02/03 truck that is configured like mine (automatic and non-California).
List price from the dealer is $950
List price from the dealer is $950
Former Vendor
Joined: Jan 2006
Posts: 3,849
Likes: 1
From: Seattle
Call Ed.
I bought one for my truck already because I know that wiring doesn't last forever.
I'm saving it for the day that I need it.
I've already had to patch the existing one twice.
One was to fix a mistake that I made when playing with a 10k mod many years ago and the other one was to the AC pressure switch.
The wire simply broke apart inside the connector and I had to drive home with no AC on a hot summer vacation.
The new harness wasn't cheap, but having a truck go down while out of town can get a LOT more expensive.
.
But now you have me nervous that I might not have the right one and so I better get it out of the box and make sure.
I bought one for my truck already because I know that wiring doesn't last forever.
I'm saving it for the day that I need it.
I've already had to patch the existing one twice.
One was to fix a mistake that I made when playing with a 10k mod many years ago and the other one was to the AC pressure switch.
The wire simply broke apart inside the connector and I had to drive home with no AC on a hot summer vacation.
The new harness wasn't cheap, but having a truck go down while out of town can get a LOT more expensive.
.
But now you have me nervous that I might not have the right one and so I better get it out of the box and make sure.
you have the correct one per your vin..... but if you do have a issue you let me know....
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I haven't had a chance to even think about this, very busy with other things right now (work).
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