I seen a thread that mentioned wiring in a manual switch for the overdrive in my truck. i have a 91.5 4X4 and the overdrive and speedo quit working and i can't get it to work. does anyone know how to wire in this manual switch?

Thanks,
Josh

 

The blue wire on the OD solenoid harness is power, grounding the other wire will give you OD if the trans is in 3rd.

 

thanx,