2026 Ram 4aux Switch Wiring Diagram

[Kalrod23]

Does anyone have the actual wiring diagram itself for the 2025/2026 2500 with the 4aux panel? Just looking to see if it is different/how different it is when I want to put on my rear lights or if I can follow the same logic I used for my 2024 in the attached pic.

 

[BighornHDRam]

I just did this on my 2026 3500 Limited Mega Cab for my swapped over BD/CJC backup lights from my 2022 but I used Aux 2 and A500 RD/WH wire to the back. I pulled all parts including the jumper wire for the under hood Aux connectors and plugged them in to the connectors. I hate where they stuck the new light grey connector as I had to detach the Christmas tree (which was a pain) and re-route it as it was into the ground cable on my truck.

The connector under the dash to swap in my case the wire in and out #5 to #4 is in a WAY more convenient place to plug in than on my MY2022 truck was. I did not get a pic of the under the dash connector but if you have done this before you just un-pin and move the wire to the correct slot you want, I just made a nice small coil of the wire and put a small zip tie on it and some harness tape where it would rub on a metal bracket and tucked it up and did the settings in the commercial side and everything worked just like my MY2022.

Pics are from my MY2022 but results are the same on my MY2026.

 

[BighornHDRam]

I decided to get those other pics of the engine bay and under the dash connection points on my 2026 3500 Limited Mega Cab

 

[Kalrod23]

Thank you very much. So the pin out should be similar. I should be able to either depin or splice it. On my 24 I couldn’t get it to depin for some reason so I think I just spliced into it. This is very helpful!!!!

Did you also put a relay in so they trigger off your reverse lights? Or only off the Aux switch?

 

[BighornHDRam]

Thank you very much. So the pin out should be similar. I should be able to either depin or splice it. On my 24 I couldn’t get it to depin for some reason so I think I just spliced into it. This is very helpful!!!!

Did you also put a relay in so they trigger off your reverse lights? Or only off the Aux switch?

No relay needed as the Aux switches already have them and they turn off with the truck the way I have it setup in the commercial settings, to de-pin the connector you slide the white push in part out and I remove it to expose the small clip that holds the wire connector in the housing. Once you lift up the locking tap the wire will slide out and you can move it to any slot. I use a Metri-Pack tool to slide the locking tab.

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[Kalrod23]

I will give the depin another try.

When I did my 24 I had it set up such that I had my lights set to trigger to turn on via either the Aux switch or the reverse lights. I put a relay in the back under the spare tire as a diode of sorts in the event that I turned the Aux switches on I would freak out the TIPM with the truck not in reverse.

Do you have yours set to run on just the Aux switches or Aux and reverse?

 

[BighornHDRam]

I use Aux 2 and A500 RD/WH wire to the back, I select Aux #2 when I want to turn them on/off. They automatically turn off if you turn the truck off if you setup correctly in commercial settings, but if you turn them on and back up don't forget to turn them off before you drive down the road as I did this one time on my MY2022 and a guy in a jeep with backup lights was flashing me reminding me they where on.

Try to find a video on Yazaki connectors on how to de-pin as this is the connectors on our trucks as it should help you out.

 

[Kalrod23]

Got it. Thanks.