hi guys this may or may not be in the right place for this post i was trying to get it in a forum that will get traffic by those well versed in the wiring specific to 98-99 trucks.  

i have a 98 ram that the CC will not turn on. the light on the dash will not turn on and attempt to work.

this is not a very standard truck.  the build is..

-1998 ram 1500 4x4

-4bt

-nv4500

-98 MT PCM

-98 cummins MT engine and transmission harness

-99 2500 cummins frame, under hood and in cab wiring harness 

-99 2500 cummins interment cluster.

CC is the only thing not working i can jump in her and it starts and runs like a 12v truck. no CEL, tach, odometer, speedometer, fuel level, engine temp, and volt gauges all work correctly.  
i cant find any wiring in C130 at PDC that is causing a problem.  CC signals are getting from the steering wheel controls to the pcm (c3 pin 11).  The CC circuit from pcm through brake switch to CC actuator is complete with foot off the brake pedal and opens when pedal is pushed.(pcm C3 pin 11 to CC actuator pin 3) speed control supply on pcm C3 pin 11 will only produce +12v when I actuate the CC vacuum/ vent circuit using my scan tool. The best I can tell the pcm is un happy and will not turn on CC.  am I missing something on the 98 12v side? I know the vac brake trucks had a vac sensor that turned on the brake light but I didn’t think hyd boost trucks used this sensor?  There are no codes in abs module either.

I have 3 symptoms that I under stand are unrelated judging buy replies on a previous posts on there pages.

-p1765 was told this is not going to stop CC any impute on this code?

-p1388 I have gotten this intermittently recently but CC still doesn’t work even when its cleared.
-seat belt light comes on after engine is running and will not shut off.

 

I’m pretty disappointed I drove this using 99 under hood wiring for an at with a at in it for 12 years with the ecm flopping around and every thing was working before buying a southern truck and swapping to the MT and MT wiring during the resurrection proses.

tried a few more things, i switched out clusters and the 99 pcm turns on the cc light of the 98 gas cluster. seems to suggest they are communicating fine. 

i installed the 98 AT pcm that is setting AT codes and no engine codes. i installed a wire and pin in c1-6 tried the cc with wire both grounded and powered and same results no cc light on dash.
i don't know what the probability is that i could have 2 98 12v pcm that did not have CC, both pcm's will actuate the valves in the servo when using a scan tool to test function.  

I still haven't identified all the components on the ccd buss the check if there is a compatibility issue there.

Edited August 27, 2024Aug 27 by svoking

This should help.

https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/electrical/ccd-chrysler-collision-detection-data-bus-r329/