While installing my Fass DDRP I found a 3 wire weatherpack connector with a 3 wire weatherpack sealed cap on it. What is it for? I figured it is for a manual truck, NNS and reverse lights. My truck is an automatic.

CANBUS connector. This is the Cummins diagnostic port or the port you hook your enhancement module too.

Thanks. Thought it would need more than 3 wires. What is an enhancement module? A tuner.

Yes. Edge Comp, Edge Juice, Quadzilla, Power Puck, Etc.

 

Nope just 3 wires.

Thanks Mopar1973man.