Aux reverse light to switches

[Dirt Bag]

I have my aux reverse lights wired in to my trailer reverse wire. I was wondering if anyone found an easy way to wire it in to the auxiliary switches via relay or fused connection or anywhere else near the splice connections under the hood.
Call me lazy but I don't want to run a power wire all the way from the aux splices to the rear bumper.

 

[The Car Stereo Company]

no such luck. have to run a wire

 

[Rookie]

Even if there was a way to force power to the trailer reverse lights to kick your aux lights on, I feel like it'd be more work than running a wire back there. Lol

 

[The Macf]

Run the wire. Takes 10 minutes.

 

[Dirt Bag]

Ten min unles you are OCD like I tend to get with stuff like that.
I'll end up with 25 lbs of tie wraps under the chassis

 

[BAJASVT]

Assuming that the factory reverse wiring is adequate to power the auxiliary reverse lights that you're running, it appears this can be done. The wire going to the reverse lamps in the tail lights (blue/white) and the reverse wire running to the 7-pin trailer tow connector (grey/brown) are both 16 gauge, so take your choice, but the trailer tow connector wire is probably easier to access.

It appears that if you use a >15A AUX switch to power the blue/white wire @ BCM connector C2280D, pin 13, that this will illuminate your factory reverse lights and anything feeding off of them for power.

BCM connector C2280D is a black 32-pin connector at the passenger side lower a-pillar.

 

[J DAMAGE]

I did the aux reverse lights using my dually's, ran a piece of 12-2 wire in the frame, with a waterproof relay in the rear.
One of the wires is for 12+, the other is for upfitter switch. I taped into the trailer hitch harness at the rear.

 

[Dirt Bag]

That's what I am looking for!
Thanks Baja.
If I get too deep I will end up running the wire like Damage.
Logic tells me there are already wires doing what I want back there I just need to find them and get them switched to my panel

 

[BAJASVT]

After looking at the diagram again, you'll be better off getting your power from the grey/brown wire at the trailer tow connector. The blue/white wire at the reverse bulbs and the grey/brown wire for the trailer tow are both individually fused at 15 amps, but the blue/white already serves three functions:

1) illuminate a reverse bulb in each tail light
2) dim the auto-dimming interior mirror (if applicable)
3) trigger the control side of the relay that powers the grey/brown tow harness wire

All of this is minimal current draw, but it does pull from the available 15 amps. If you get power from the grey/brown trailer tow wire, you're getting full and unshared 15 amps on a dedicated fuse... unless, of course, you're towing a trailer with reverse lights.

Tap into that blue/white wire at the BCM connector with +12V and see if the reverse lights turn on... let us know.

 

[BAJASVT]

Reverse diagram