Auxiliary lighting

[Cohocarl]

I made a bracket that bolts up to the trailer hitch & wired them into the reverse lights.  

Have a couple diodes to wire up to the switched bed light also when the weather gets nice enough.

 

 

[vulcan_classic]

FYI

 

Here is tailights schematics (MY2020) for anyone interested; use the RPO codes which match your trim level:

 

 

tailights.pdf

Edited March 19, 2020 by vulcan_classic

[RunGMC19]

On 7/3/2019 at 1:32 PM, Mash2k10 said:

Reverse on my truck is green with white tracer being a Z85 trailering package. Unfortunately this was not a good power source for auxiliary lighting because the truck has to sense(electrically) a trailer in tow to work. Next step I tied into the blue positive / black negative on the cargo lamps. This would allow the aux lights to flash 3 times then shut off all cargo lamps. My little project is much harder on this new truck then the last ones I have had. 

Did you find a fix for the tap off the cargo lights?  I just did the same thing and got the same result.  I'm hoping there's a fix because i really don't want to redo all of it. When I connected the first light,  it worked with no issue.  Then the second light caused the triple flash and off. 

[RedLT]

On 2/20/2022 at 11:01 AM, RunGMC19 said:

Did you find a fix for the tap off the cargo lights?  I just did the same thing and got the same result.  I'm hoping there's a fix because i really don't want to redo all of it. When I connected the first light,  it worked with no issue.  Then the second light caused the triple flash and off. 

 

Lights are shutting off due to overload.  Run a relay (4 pin relay) to your trigger source and grab a constant 12v to power the relay. Ground the relay and wire the lights to the relay.  Most are using the 12v from the 7 pin trailer plug, use a volt meter to determine it.

[RunGMC19]

On 2/23/2022 at 5:53 AM, RedLT said:

 

Lights are shutting off due to overload.  Run a relay (4 pin relay) to your trigger source and grab a constant 12v to power the relay. Ground the relay and wire the lights to the relay.  Most are using the 12v from the 7 pin trailer plug, use a volt meter to determine it.

Got it.  Thanks for the info!

[fluxcapacitor11]

On 2/23/2022 at 7:53 AM, RedLT said:

 

Lights are shutting off due to overload.  Run a relay (4 pin relay) to your trigger source and grab a constant 12v to power the relay. Ground the relay and wire the lights to the relay.  Most are using the 12v from the 7 pin trailer plug, use a volt meter to determine it.

sorry for the dumb question.  Are you saying to run all the way to the button in the cab? Or connect the 4pin relay to the cargo light + wire, then pull hot and ground from the trailer light cluster?