I have a 2002 Dodge ram 1500 5.9L Quad Cab 4x4. It started having problems with the transmission. I have since change the TCC and OD sensor, the Govenor pressure sensor, the wiring harness, and the transducer. because I was getting a code PO748. I am not getting the code now but I am getting no power to transmission. So I changed the PCM. I am still getting no power to the transmission. I have now changed the transmission relay in the distribution center. Still nothing my next thought is to trace the wires to check for a broken connection but I can't seem to find a color diagram for the wiring harness so that I can trace the connections. Does anyone have an idea what is wrong with my truck?

 

no power? as in, absolutely none? or- slipping?

 

Well the wires to the govenor pressure solenoid when you check it with the test light none of them have power to them and when you drive the truck it will not shift from 3-4 to OD. At the moment I have the distribution center removed so that I can try to tract the wires to the PCM and then down to the transmission to make sure none of them are burnt.

 

Before I removed the distribution center I could not get a shift from 3-4 to OD I checked the wires and the red one that is supposed to have power at all times did not.

 

t/c lock is an electronic function.. explains that.. it certainly sounds like a short, somewhere.

 

get yourself some contact cleaner, or brake cleaner, or even some throttle body cleaner, and spray your round 8 pin connector out good, both male and female.. as a place to start, anyway..

 

I will try that...I hope it will be as simple as cleaning it...Somehow I feel that tracing the wires may be my only option. Do you have any idea where I can get a color diagram of the wiring harness to pcm then from pcm to tranny.

 

https://dodgeforum.com/forum/2nd-gen-ram/41924-merry-christmas-guys.html

 

Thank You