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Unused timed auxiliary fuse

Metal.Dave
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Metal.Dave Enthusiast

Metal.Dave

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Hey all! Got a 2021 L5p

Looking for an unused auxiliary fuse that is on a timer, meaning it will cut power after 10-15 minutes if truck is not running, same way that mirror & cargo lights shut off after xx minutes.

I am guessing the upfitter kit uses a timed fuse? But cant find any info on that to confirm.

 

Thanks!

Another JR Senior Enthusiast

Another JR

Posted
Posted (edited)

The default connections for my factory delivered 2021 upfitter switch kit are to the hot main battery fuse block and to the “ignition on” bus. You can set it up for certain switches to control always hot or ignition on devices. I haven’t installed my kit yet, but I plan to set it up with two switches controlling power from the ignition on bus and three controlling relays that are always hot from the auxiliary battery. 
 

I could photograph the instructions that came with the kit if that would be helpful. 

Edited by Another JR
Major Tom Enthusiast

Major Tom

Posted
Posted

Upfitter switches are either always have power or powered on when the ignition is on. They are controlled with two fuses that connect three/two of the upfitter circuits.  There is no timer, you will have to go to another fuse block for the timed off function.

Metal.Dave Enthusiast

Metal.Dave

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Im guessing that the timer function for the reverse / cargo lights on the mirrors is activated and controlled by the BCM, so tapping into the fuse or signal wire would be useless anyways as the timer function wont be active unless the reverse / cargo lights are active.

 

Unless someone has studied the wiring diagram and can confirm otherwise- Project has been scrapped. 

For now I will have to go with a always hot fuse.

PBNB Enthusiast

PBNB

Posted
Posted

I installed my upfitter kit about 6 months ago and like what everyone else is saying 2 positions on the fuse, On all the time and Ignition switched. 

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