OEM Off-Road Light Switch Install

Buckwild27 · February 3, 2024

7 hours ago, Lupillo13 said:

Nice bro. This is my set up!.

That is pretty sweet!

Lupillo13 · February 3, 2024

52 minutes ago, Homewrecker007 said:

That is pretty sweet!

Thanks!

Lupillo13 · February 5, 2024

On 1/30/2024 at 7:40 PM, Homewrecker007 said:

Ok, so this is for anyone who has a 14-15 truck that still wants to do the OEM headlight switch with the Off-road button. Or if you want on/off without delay for the 16-18. I found that the Amazon latching relays were unreliable in functionality. This way works perfectly every time. I'm not a 100% sure but for the folks that have a 16-18 truck you might be able to run the grey wire to bcm and to the relays and still get the dash icon light to come on. I will test this when I wire up my 18 in the future.

Hey bro so I tried the relay setup and CAN'T get it to work don't know what i am doing wrong... Om the relay diagram you have the yello wire connected to 12v output there is no power. And on the wire where the gray wire connects to relay it has power always. I checked my connections with the diagram. So not sure what the issue. Can you help?

Buckwild27 · February 6, 2024

23 hours ago, Lupillo13 said:

Hey bro so I tried the relay setup and CAN'T get it to work don't know what i am doing wrong... Om the relay diagram you have the yello wire connected to 12v output there is no power. And on the wire where the gray wire connects to relay it has power always. I checked my connections with the diagram. So not sure what the issue. Can you help?

Did you hook to the bcm at all? If so it could be causing the issue. Can you send me some pictures of the wiring on the relays?

ashkanani · June 18, 2024

Hi all

I'm new in this forum & I hope U can help me with my problem please .

I have 15 Sierra all terrain , I did purchased both of the off road switch & the harness from Dr. harness site , also I did the instillation , but the LED bar light didn't work also there are no indicator in the cluster .

do any one know whats wrong & any solution ?

Buckwild27 · June 18, 2024

8 hours ago, ashkanani said:

Hi all

I'm new in this forum & I hope U can help me with my problem please .

I have 15 Sierra all terrain , I did purchased both of the off road switch & the harness from Dr. harness site , also I did the instillation , but the LED bar light didn't work also there are no indicator in the cluster .

do any one know whats wrong & any solution ?

The 14-15 trucks don't have the bcm programming for the dash indicator. And you will have to make a latching relay like I made here in this post. And not hook wires to the bcm.

https://www.gm-trucks.com/forums/topic/214990-oem-off-road-light-switch-install/?do=findComment&comment=2650532

Edited June 18, 2024 by Homewrecker007

ashkanani · June 18, 2024

37 minutes ago, Homewrecker007 said:

The 14-15 trucks don't have the bcm programming for the dash indicator. And you will have to make a latching relay like I made here in this post. And not hook wires to the bcm.

https://www.gm-trucks.com/forums/topic/214990-oem-off-road-light-switch-install/?do=findComment&comment=2650532

thanks for the replay , & its a sad news to know about it , but as U mentioned that it will not hooked to the BCM so from the yellow line it will go also to the LED bar , is it ?

or if U please send me a diagram to do it exactly what to ware .

& thanks allot

Buckwild27 · June 18, 2024

37 minutes ago, ashkanani said:

thanks for the replay , & its a sad news to know about it , but as U mentioned that it will not hooked to the BCM so from the yellow line it will go also to the LED bar , is it ?

or if U please send me a diagram to do it exactly what to ware .

& thanks allot

Yes in the picture the yellow wire goes from switch to tie in between the relays and the light bar. Everything in the diagram picture is as it should go.

ashkanani · June 19, 2024

5 hours ago, Homewrecker007 said:

Yes in the picture the yellow wire goes from switch to tie in between the relays and the light bar. Everything in the diagram picture is as it should go.

thanks allot , I'll order the relays & I'll do the wiring , I hope to do it will .

thanks bro.

Buckwild27 · June 19, 2024

42 minutes ago, ashkanani said:

thanks allot , I'll order the relays & I'll do the wiring , I hope to do it will .

thanks bro.

You're welcome, let me know if you need anything.

ashkanani · June 19, 2024

59 minutes ago, Homewrecker007 said:

You're welcome, let me know if you need anything.

I'll do bro.

ashkanani · June 25, 2024

On 1/31/2024 at 5:40 AM, Homewrecker007 said:

Ok, so this is for anyone who has a 14-15 truck that still wants to do the OEM headlight switch with the Off-road button. Or if you want on/off without delay for the 16-18. I found that the Amazon latching relays were unreliable in functionality. This way works perfectly every time. I'm not a 100% sure but for the folks that have a 16-18 truck you might be able to run the grey wire to bcm and to the relays and still get the dash icon light to come on. I will test this when I wire up my 18 in the future.

thanks guys , I did it & its work fine & every thing is OK , but I hope to find way that instrument cluster icon will light up.

thanks to all guys

Lupillo13 · June 25, 2024

1 hour ago, ashkanani said:

thanks guys , I did it & its work fine & every thing is OK , but I hope to find way that instrument cluster icon will light up.

thanks to all guys

You can try connecting the gray wire to BCM amd see if it will light up the indicator light on the dash. GRAY WIRE TO PIN # 12 WHITE BCM CONNECTOR. Let us know if it works plz.

wyattkb · January 11, 2025

Reviving this thread because I came across it in my search.

It looks like BT Diesel Works AutoSync can program the BCM to use the offroad light switch.

I came here to ask if anyone knows if the part # 84448514 will work for a 2015? The part # 84168423 has been discontinued and is crazy expensive if you can even find it.

The harness and new switch part # only comes out to about $100 so I was just going to send it and see if it works but thought I would ask here first.

Buckwild27 · January 12, 2025

22 hours ago, wyattkb said:

Reviving this thread because I came across it in my search.

It looks like BT Diesel Works AutoSync can program the BCM to use the offroad light switch.

I came here to ask if anyone knows if the part # 84448514 will work for a 2015? The part # 84168423 has been discontinued and is crazy expensive if you can even find it.

The harness and new switch part # only comes out to about $100 so I was just going to send it and see if it works but thought I would ask here first.

The switches are all the same function wise. That's just an updated part number. Are you sure the autosync can make the offroad light switch work in the bcm? I know it allows you to change the turn off delay for trucks that have the factory programming. I have an autosync and I had to build the latching relay setup to run the switch in my 2014.