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Trailer Brake Controller, Need Fuse?

2500HD 8.1

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2500HD 8.1 Enthusiast

2500HD 8.1

Posted
Posted

I installed a Hoppy Impulse trailer brake controller in my 2005 Yukon. I used the quick connect harness and plugged in it under the dash. I have yet to test it towing a trailer, but I can't find any information about adding a fuse. I can't find any information about a fuse for a trailer brake controller in the owner's manual, and it says nothing about adding a fuse in the brake controller instructions.

 

I remember the wiring harness that came with my 2000 Yukon and it had a large fuse with instructions to place it in the fuse block under the hood. I know GM changed a lot of electrical things in 2003, and I'm not sure if this is one of them.

 

I think I'm good to go, but just wanted to make sure I don't need to add a fuse somewhere in the truck.

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Check for a larrge 40 amp fuse in stud 2 in the under hood electrical center.

 

***If memory serves correctly, verify the fuse size and stud number. It is labled on the bottom of the lid, the harness should have had one taped up with it, that is if it was the GM supplied harness. Plus this is all referring to an older year truck so I could be ALL wrong. :banghead: ***

Dave in Mpls Enthusiast

Dave in Mpls

Posted
Posted

Sounds like you have the brake controller plugged in - to verify, this gets plugged into the center instrument panel fuse block located on the kick panel under the dash, top row/second from left.

 

In the underhood fuse block (located near battery) is a Stud 1 and a Stud 2. Stud 2 provides power for the brake controller, and is a 30A fuse, which should be factory installed. Stud 1 provides auxilary power to the trailer plug. From the factory, Stud 1 typically contains a red "dummy" fuse. This should be replaced with a 40A fuse if you wish to utilize the constant 12V power at the plug. If your truck did not come with the tow package, the lead for Stud 1 may need to be connected as well.

 

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Shaners Senior Enthusiast

Shaners

Posted
Posted

On my '05 the truck came with the towing package.

 

There was a dummy fuse in the the fuse block and it was covered with some paper tape. I had to tear the sitcker off and pull the dummy and replace it with a maxi-fuse.

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