Do you mean auxiliary + Power?
Yes, to get an auxiliary power source in the back. With the F150 having all the rear bed power options, it would be nice if that would have carried over to the 250 sooner than the new 2023. I'd like to add aux/USB in the rear for charging camping gear.
I plan on doing the same- but with a dedicated fused power wire leading from the battery to the bed. As is, the positive power lead in my 7-pin is enough to trickle charge my camper battery. I wouldn’t want to put a large load on it. I would run 12 gauge or bigger wire from the front with a 30A fuse. Easy.
I had to sit with my multimeter and the power diagram on the 7-pin cover for a while to make sure of which wires were which. I figured I would let the magic smoke out at some point during the project but so far so good.
It’s probably a different plug with the SDs have a bit more wiring going to the back end than the 150s have.
Not that exact one, but DD does offer a 7-pin adapter nearly identical to what I posted, except it also supports their lights that can have turn signals, reverse lights, and running lights. The harness is 40 bucks and the cost of the lights was something like $260. I’m cheap so I made my own setup for $110 all-in.
Glad to hear it. For the record, I did run FORscan this past weekend, and this mod did not give any trouble codes.
Wired this particular way, the lights only get 12v when the truck is put in reverse. So even if you put in a relay to try to control via an upfitter switch, you’ll still only get power to the lights when in reverse.
you should be able to wire it up so both would work, the backup lights would come on also using 1 relay. Using 2 relays would work but you’d need a constant power ran to the rear for the relays.
I’d unplug the new harness and check each of the pins with a multimeter to confirm the OE harness is connected and working right. Then go through and make sure each connector is going where you want it to. Gotta be connection issue, probably in the new 7-5 pin harness.I just tried this same setup with the same lights but I get nothing, no power to lights. Maybe I have a bad 7-5 pin adapter or issue in original 7 pin. Factory reverse lights come on but no on the Harbor Freight lights.
Also, I just thought about it. Are you absolutely sure you have the polarity correct? Hot wire to hot and ground to ground? From what I understand, you can’t reverse polarity on these LED lights.I just tried this same setup with the same lights but I get nothing, no power to lights. Maybe I have a bad 7-5 pin adapter or issue in original 7 pin. Factory reverse lights come on but no on the Harbor Freight lights.
