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myredracer's avatar
myredracer
Explorer II
Jun 26, 2019

TT brakes not working right - new truck & new wiring

Just rewired all the brake wiring in our TT to all #12 right up to the junction box in the A-frame. Recently installed the Prodigy P3 brake controller out of our old F250 in our "new" 2012 GMC Sierra...
RCMAN46's avatar
RCMAN46
Explorer
Jun 28, 2019
The P3 has a whole host of diagnostic features. Such as it will tell you what the voltage and current that is being delivered to the trailer.

Have you used any of the diagnostic features?

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