Extend Towing mirrors rear guidance light

[AK_ Maverick-X3 1]

 

Could someone help me in trying to figure out why I can’t get the rear view extend mirror guidance lights to work.

My understanding is that the rear cargo light needs to be on along with shifter in Park, Reverse, or Neutral.

I have checked the fuse and it good; the Cargo light is coming on. I took apart the part Mirror this morning and took the rear guidance light and hook up to a 12V battery- work great.

Only other thing I can think of is wiring from Mirror to wiring harness block.

 

2016 Chevy LTZ ,4x4, 2500, Diesel

 

Additional questions:

On the Pink BCM wiring #26 - What fuse does it go to?

On the Black BCM wiring #26 - What fuse does it go to?

 

Has anyone upgrade this light?

Edited January 29 by AK_ Maverick-X3
Added Additional information

[redwngr 1,350]

Do the blinker  red leds in the mirrors work?  

 

Do you know if the truck came from the factory with those mirrors installed? 

Many trucks had the mirrors changed/upgraded.  

 

RPO code should be DQS for trailer mirrors with backup lights on the higher trims with the K2 body style.  Check the rpo code label in the glovebox and see if you can find that one.  If your 16 LTZ  came with regular mirrors you will likely find DL8

 

If you still don't have the mirror functioning as desired,  reach out to member pgamboa  (the Harness Dr) 

 

Also check out this thread - 

 

Edited January 31 by redwngr

[AK_ Maverick-X3 1]

Yes the red blinkers work.

No I'm the second owner of the truck. I do have the higher trim package, so I would assume they work at one time.

Well I look at the RPO code and this is what have. I don't see DL8, but do see DL3 code.

So does this mean the previous owner upgraded the Mirrors? Just a note: the previous owner had a 5th wheel ball attach in the bed for hauling a horse trailer. It was removed from the truck when I bought it. I bought the truck from a dealer.

Can the light be program to come on with a scan tool from my buddy at the body shop? He said it's a high end one and it cost 10K.

 

Thank you for getting back to me, I really appreciate it.

Scott

[newdude 2,298]

19 minutes ago, AK_ Maverick-X3 said:

Yes the red blinkers work.

No I'm the second owner of the truck. I do have the higher trim package, so I would assume they work at one time.

Well I look at the RPO code and this is what have. I don't see DL8, but do see DL3 code.

So does this mean the previous owner upgraded the Mirrors? Just a note: the previous owner had a 5th wheel ball attach in the bed for hauling a horse trailer. It was removed from the truck when I bought it. I bought the truck from a dealer.

Can the light be program to come on with a scan tool from my buddy at the body shop? He said it's a high end one and it cost 10K.

 

Thank you for getting back to me, I really appreciate it.

Scott

 

 

 

PO changed the mirrors but didn't swap harnesses.  You need to either replace the door wiring harnesses or do the Boost Auto Parts upgrade or PGamboa the harness Doctor.  

 

Programming won't solve your issue.  Its a wiring issue. 

Edited February 1 by newdude

[Lspoo19 2]

On 2/1/2021 at 12:05 PM, newdude said:

 

 

PO changed the mirrors but didn't swap harnesses.  You need to either replace the door wiring harnesses or do the Boost Auto Parts upgrade or PGamboa the harness Doctor.  

 

Programming won't solve your issue.  Its a wiring issue. 

I’m guessing the previous owner didn’t add the two wires to your door harness one would be the cargo lamp you speak of and the front facing amber running light.  Would need to take your door panel off and run the wires from your mirror plug into the main harness in the door. Boost auto sells this or pgamboa as mentioned. I had dl3 and upgraded to tow mirror