Installed CURT 59236 4 way flat trailer wiring. Summary.

Garbone

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So spent the morning with my test light and figured out things.

I installed mine so the flat is inside the hatch since it will rarely be used at best.
Ford Mustang Mach-E Installed CURT 59236 4 way flat trailer wiring. Summary. 71E82f2pjCL._AC_SX679_


Install required taking out the center sill and both lower side panels.

I mounted the unit behind the passenger side panel as there is plenty of space and easy access to the power wire that supplies the accessory outlet.

I pulled both tail lamps and with the assistance of my 8 year old daughter running the signals from the drivers seat noodled out the colors of each wire using my test light.

On the right side (passenger)

Green w Orange tracer is Right turn
Slate w Violet tracer is Stop
White with Orange tracer is Tail lamps

One the left side

Slate w Orange tracer(red maybe) left turn

I then carefully cut open the harnesses and splice in my unit after verifying I had the correct wire with my test light.

On the left side I opened up the harness at the red in this drawing I lifted from the Ford Europe install manual.

Ford Mustang Mach-E Installed CURT 59236 4 way flat trailer wiring. Summary. Screenshot 2023-09-03 8.39.17 PM


There is a lot going on in the left side so it is good that only one wire is spliced here, I used the supplied wire with the kit to run it to the unit on the right under the sill.

I used the supplied double sided tape and zip tie to fix the Kurt module to the bracing, the ground ring reached the factory ground on the wheel well so I just used that and did not tap any new holes.

Sorry, did not take any photos of behind the right hand panel.

My one suggestion is a very sharp utility knife and cut along the loom gently not to cut the contents as the factory wire is fairly thin.

**installers note- I have transition glasses that tint when exposed to UV. It was sunny in the driveway this morning and I noticed the tinting makes my Red or Orange tracer identification sketchy. I would verify each wire using a test light before crimping.**
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Mach-Lee

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On the left side I opened up the harness at the red in this drawing I lifted from the Ford Europe install manual.

Screenshot 2023-09-03 8.39.17 PM.png
That is the IPMA (BlueCruise) wire harness, I would advise everyone not to touch any harness related to that module due to the critical safety aspects it performs.

You should be tapping into the taillight harness, not the IPMA harness IMO.
 
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Garbone

Garbone

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Oddly enough the tail loops from the housing and back up into the main harness at that approximate location.

I would have tapped in behind the light but it is close to impossible to snake thru a wire on the left side. There are more wires than just signals in these harnesses for sure.

Also not pictured here is the Wireless modem located above and to the right of the mark.

I would recommend if someone is unable to fix a cut wire on there own, do not open a harness.
 

Lineareagle

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Yes I did install it. I did get a notice on the dash that there was a voltage leak but that seems to have resolved itself. My set did not include the bracket which I had to buy separate. Hardest part is dropping the under body panels to get at the location for the module and pulling up the frunk panels. Otherwise fairly straight forward and works great.
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