Forum Discussion
willald
May 07, 2015Explorer II
two-niner wrote:
Will: did you use the 7 pin to 4 pin plug shown on the highlighted E-Trailer and how did you run the power line, from the #7 pin on the base plate? I assume it would remain "hot".? The more I see this the better it sounds. The brand shown is what I used to fabricate the umbilical, except I went one size better ie; instead of 14ga went with 12ga, as opposed to what Roadmaster used.
Kerry,
No, I didn't use a 7 pin to 4 pin adapter. I bought a wire similar to THIS but longer, connected it to the 4 flat connector for the magnetic lights. Then, ran the wires for such under the car to the front, and connected the wires directly to the appropriate pins on the back of the 6 round connector at front of the Fusion.
I used a 6 round connector and 6 pin umbilical cord, not the 7 pin one that you used. I only needed 6 'pins':
Ground
12V power/charge line (yes, always 'hot' which is why its fused)
Right Turn & Stop (magnetic lights)
Left Turn & Stop (magnetic lights)
Tail lights (magnetic lights)
Brake light LED indicator on MH dash (goes to brake sensor I installed in the Fusion)
Will
About RV Tips & Tricks
Looking for advice before your next adventure? Look no further.25,172 PostsLatest Activity: Oct 23, 2025