Customer wiring harness

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Mar 20, 2006 | 09:49 PM

sgrol

Thread Starter

Laughing Gas

Joined: Jan 2006

Posts: 1,045

Likes: 5

From: Gig Em, Tx

Customer wiring harness

I found some unused wires up under the steering wheel labeled something like customer wiring harness, no plugs or anything just wires. Anybody know where the other end of these wires are? Tried searching for this but got no hits.

Mar 20, 2006 | 09:58 PM

cookie88

FTE Leadership Emeritus

Joined: May 2001

Posts: 13,653

Likes: 6

From: Cabot, Arkansas

They're in the engine bay on the other side of the firewall. They are so you can run power to whatever equiptment you may want to add...i.e. customer access wiring.

Mar 20, 2006 | 10:07 PM

sgrol

Thread Starter

Laughing Gas

Joined: Jan 2006

Posts: 1,045

Likes: 5

From: Gig Em, Tx

Thanks Scott. I looked for them on the engine side but could not locate the other ends. Do you know more specifically where they terminate?

Mar 20, 2006 | 10:13 PM

cookie88

FTE Leadership Emeritus

Joined: May 2001

Posts: 13,653

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From: Cabot, Arkansas

They're probably buried in the main harness where it comes through. Not more than 8-10" from the firewall.

I had the opposite problem. They were sticking out on the firewall side, but I had to dig them out of the harness in the cab.

Oct 8, 2020 | 02:02 AM

marksman76

Laughing Gas

Joined: Oct 2018

Posts: 1,005

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From: San Diego

I am having trouble finding my pass thru wires in the cab of my 2001 F250.

Do I need to remove the kick plate down by my emergency brake?

I also found the light blue w pink tracer by OBD port that goes back to Fuse 27, 10a for customer use.
I believe thordehr was helpful on that.
I am going to hook up my lighted switch for my electric vacuum actuator for my Ranger AC mod to return to normal for heat in the winter.

Thank you!

Oct 8, 2020 | 06:12 AM

Dan V

Lead Driver

Joined: Jun 2013

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From: north of Minneapolis, MN

They are above the throttle pedal.

Oct 8, 2020 | 11:37 AM

marksman76

Laughing Gas

Joined: Oct 2018

Posts: 1,005

Likes: 85

From: San Diego

I did see loose wires there along with the light blue with red stripe from fuse 27.

So I assumed the other loose wires also went back to my fuse block.

I will see if i can get continuity.

Thank you.

Last edited by marksman76; Oct 8, 2020 at 11:37 AM. Reason: spelling

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Oct 8, 2020 | 12:18 PM

Y2KW57

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It helps to remove the knee bolster cover under the steering wheel. When looking underneath, look more toward the area above the center transmission hump, in line with the accelerator pedal, as was already mentioned. Don't waste any time looking over by the emergence brake pedal, even though in the engine compartment, the pass through wires emerge under the hood on the firewall right next to the driver's side fender, in line with the emergency brake.

The colors of the pass through wires under the hood match the colors of the pass through wires under the dash above the accelerator pedal towards the center stack. Unfortunately, some of the same solid colors are used for the trailer brake control circuit, so your continuity testing is a good idea.