I had the dash out to replace the heater core, now the brake lights and cruise control don't work. From the wiring diagram I see that power for both systems comes through the RFI module which is supposed to be located "in the vicinity of the steering column" and has a 10 pin dual inline plug. I suspect this module didn't get plugged back in but so far I've been unable to find it. Anybody know what it looks like or exactly where it is located? Thx. JB

 

How about some specifications on the truck ?

 

Nevermind... I found it. A socket up above the diagnostic port. Problem solved.

JB