Fuse Box Instructions for Installing a Brake Controller on a 2003 Chevy Silverado
Published 10/20/2017
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Question:
Thanks for the response. This would help me if I had all the Wire in that Video. Right now i only have one blue wire in the fuse box under the hood. With the Blue wire there is the Red Wire that follows that Blue wire from the Trailer Plug. If i dont have the Red Wire and Black Wire from Under the Dash do i need to pull additional wire from this Fuse Box.
asked by: Andrew A
Expert Reply:
Whether your 2003 Chevrolet Silverado came with a factory 7-Way or not, the wiring for both the brake controller and the 12V power pin on a 7-Way is already run. If you check out the video I attached of the Prodigy P2 # 90885 being installed on a similar 2003 Silverado you can see what needs to be done with the wiring under the fuse box at the 3:20 mark. You will just need to connect the Blue wires together and you will be good to go since you already took care of the Red wires.
The P2 uses a plug-in connector # 3015-P to install on your Chevy as you can see at the start of the same installation video. You will not need to run any wiring to your cab.
If you have 12V power to your 7-Way, then I imagine the wiring for your brake controller is already run to the 7-Way. To ensure that your brake controller is working correctly after it is installed you can perform this simple test. Using a Circuit Tester # PTW2992 on the 5 o'clock brake controller pin (see attached photo), set your brake controller to the highest power setting and apply the manual override lever. This will send 12V of power to that pin on your 7-Way which will in turn activate the brakes on your trailer.
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on Trailer Brake Controller
Andrew A.
10/20/2017
Thanks for the response. This would help me if I had all the Wire in that Video. Right now i only have one blue wire in the fuse box under the hood. With the Blue wire there is the Red Wire that follows that Blue wire from the Trailer Plug. If i dont have the Red Wire and Black Wire from Under the Dash do i need to pull additional wire from this Fuse Box.