Factory Integrated Brake Controller on a 2007 Chevy Silverado 2500 New Body Style Blows 30 Amp Fuse

Question:

keep blowing the 30amp fuse under hood on my OEM ITBS, have checked everything that i could think of, 7way plug, and looked for wires grounding million wires to look at !!! do you have any input, next step if i cant figure it out, is to add a aftermarket brake control. thx

asked by: Randy

Expert Reply:

Since the fuse keeps blowing (I assume when a trailer is connected) then there is probably an issue on the trailer, possibly with the magnets or wiring. To check the magnets, start with the wiring. You need to look for any breaks in the wires that might be touching bare metal. The grounds need to go to a corrosion free bare metal surface near the magnets.

Visually inspect the magnets and if you can see the windings coming through then they will need to be replaced. To further test the magnets I have included a link to an FAQ you can follow.

Also check the trailer and vehicle connectors for any dirt or corrosion. Corrosion can also build up at the backs of the connectors where the wires attach. If the issue continues to happen you may need to have a GM tech take a look at it.

If you do decide on installing an aftermarket controller, we have an FAQ for that as well that explains everything you need to do. I have linked it for you. For a brake controller I recommend the very popular P2, # 90885. It is a very reliable controller that is easy to set up and easy to use.

expert reply by: Michael H