lost factory brake control function 07 silverado

[05TB90TROOPER]

have a customers truck and lost factory brake control and all 7 pin functions on trailer plug, all fuses and relays good have power on 12 line to factory controller and 12v charge line but not at plug

 

[Mounce]

Tried tracing the wires to see if they've been severed?

Have you checked the ground for the plug? Might be loose or need cleaned.

 

[05TB90TROOPER]

harness is intact and sealed front to back, used a jumper harness from battery ground to rear, still no voltage

 

[05TB90TROOPER]

I also did disconnect the OE 7 way plug and no corrosion in harness and tried new plug

 

[05TB90TROOPER]

disconnected factory brake control now all except brake controller ( of course ) works. installing tekonsha brake controller

 

[05TB90TROOPER]

all working now with tekonsha primus iq installed, this truck was used for plowing snow and salt spreader. Think maybe salt got inside factory contoller on frame

 

[Mounce]

Thanks for posting the resolution, might help someone in the future if they have the same issue and search for it.