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Reverse lights in towing mirror

Lon Bossom
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Lon Bossom Enthusiast

Lon Bossom

Posted
Posted

I have a 2017 gmc Denali 2500HD with the reverse lights in the mirrors, they will not come on.  The reverse lights in the tail lights work, is there a separate fuse for the mirror lights?  Is there something special that I need to turn on to make these work?

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Black Denali Canada
Black Denali Canada

Use a diode and have them come on automatically when shifted into reverse I have my fogs come on with my parking lamps and Tow mirror reverse lights come on when shifted into reverse Sent from

powerhaulic
powerhaulic

Yup, thats how they work. ;)

Waaazooo
Waaazooo

The problem is they will stay on even after you lock the doors and go inside..have a beer. Watch the game, go to bed...wake up in the middle of the night to let the dog out...and look outside and see

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42skidoox Enthusiast

42skidoox

Posted
Posted

There is a switch on the center console for the bed lights this needs to be on then they will come on if you are in reverse or park


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redwngr Senior Enthusiast

redwngr

Posted
Posted

^^^

The cargo light button needs to be on.

 

Press the switch to turn the cargo
lamp on or off. An indicator light will
turn on when the lamp is turned on,
if equipped. The shift lever must be
in P (Park) to operate the cargo
lamp. The lights on the outside
rearview mirrors turn on if the shift
lever is in R (Reverse), N (Neutral),
or P (Park).

powerhaulic Enthusiast

powerhaulic

Posted
Posted
3 hours ago, redwngr said:

^^^

The cargo light button needs to be on.

 

Press the switch to turn the cargo
lamp on or off. An indicator light will
turn on when the lamp is turned on,
if equipped. The shift lever must be
in P (Park) to operate the cargo
lamp. The lights on the outside
rearview mirrors turn on if the shift
lever is in R (Reverse), N (Neutral),
or P (Park).

Yup, thats how they work. ;)

  • Like 1
Waaazooo Senior Enthusiast

Waaazooo

Posted
Posted
^^^
The cargo light button needs to be on.
 
Press the switch to turn the cargo
lamp on or off. An indicator light will
turn on when the lamp is turned on,
if equipped. The shift lever must be
in P (Park) to operate the cargo
lamp. The lights on the outside
rearview mirrors turn on if the shift
lever is in R (Reverse), N (Neutral),
or P (Park).


The problem is they will stay on even after you lock the doors and go inside..have a beer. Watch the game, go to bed...wake up in the middle of the night to let the dog out...and look outside and see that they are still on.


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  • Haha 1
redwngr Senior Enthusiast

redwngr

Posted
Posted
1 hour ago, Waaazooo said:

 


The problem is they will stay on even after you lock the doors and go inside..have a beer. Watch the game, go to bed...wake up in the middle of the night to let the dog out...and look outside and see that they are still on.


Sent from my iPhone using Tapatalk

 

Supposed to shut off after 20 minutes.

 

2018 sierra manual:

 

Battery Power Protection
This feature shuts off the dome and reading lamps, if they are left on for more than 10 minutes after the ignition is turned off.

The cargo lamp shuts off after 20 minutes. This prevents the battery from running down.

Waaazooo Senior Enthusiast

Waaazooo

Posted
Posted
Supposed to shut off after 20 minutes.
 
2018 sierra manual:
 
Battery Power Protection
This feature shuts off the dome and reading lamps, if they are left on for more than 10 minutes after the ignition is turned off.
The cargo lamp shuts off after 20 minutes. This prevents the battery from running down.

Looks like I’m going back to the dealer, mine were on after 5-6 hours


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2017HD Enthusiast

2017HD

Posted
Posted

Yeah, mine went off in about 20min - I wish there was a way to shut them off with the remote - like tie them to the lock button.

  • Like 1
Waaazooo Senior Enthusiast

Waaazooo

Posted
Posted

Thanks for the pic!!! Does the direction of the diode matter?


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redwngr Senior Enthusiast

redwngr

Posted
Posted (edited)
1 hour ago, Waaazooo said:

Thanks for the pic!!! Does the direction of the diode matter?


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Yes!

 

(a diode acts like a one-way valve)

Edited by redwngr
redwngr Senior Enthusiast

redwngr

Posted
Posted

Thread got my curiosity up, so tried mine.

 

I was working near the truck so unlocked and pushed the cargo light button. 

Cargo light and led's in mirrors came on.

Locked truck and keys in pocket.

 

Checked occasionally to verify cargo and leds were on. 

After 20 minutes heard a relay click -- looked over and the lights were out.  

 

  • 11 months later...
madsen203 Enthusiast

madsen203

Posted
Posted
On 11/26/2017 at 5:14 AM, Black Denali Canada said:

Use a diode and have them come on automatically when shifted into reverse


I have my fogs come on with my parking lamps and Tow mirror reverse lights come on when shifted into reverse

7b5ea34be9f384857a70a5a405b2000b.jpg


Sent from my iPhone using Tapatalk

Super helpful picture. Thank you for posting. I was wondering how some folks handles the diodes. Thank you for demonstrating install and how you connected reverse lights as well. Thumbs UP! 

  • Like 1
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  • 2 months later...
Swerve-n-protect Enthusiast

Swerve-n-protect

Posted
Posted (edited)
On 12/1/2018 at 6:46 PM, Biggerdogg01 said:

Is there a certain diode to use?

 

Which diode is for the auto reverse lights?

Edited by Swerve-n-protect

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