Solution to non-functioning panel gauges.

[Bob Tom]

I am looking for any advice/comments on getting the instrument
panel gauges to function which resulted from a PCM swap.  I believe
this is topic-related; more on the diy side than the efi side.

Situation:
I have replaced a '97 PCM with an '96 MP high-performance PCM.
Both PCMs are ODB-II.  The performance gain is significant (.7 sec.
off e.t., 5 mph trap gain) but the panel gauges (water temp./
oil pressure/gas level/speedometer/tachometer) are not functioning.
I've done this because MP has not put out a '97 hipo PCM and
I'd like to achieve a 1/4 mi. e.t. goal that I have in mind.

Analysis from FSMs:
The '96 Dakota's gauges receive signals either from the PCM
or directly from the sensors.  The '97 Dakota's panel gauges
receive signals via the CCD bus from the Central Timer Module
which, in turn, receives signals via the CCD bus from the PCM.
These signals come from two pinouts in the PCM (CCD+ and CCD-
pinouts). 

Conclusion:
The Central Timer Module is not receiving any signals because
the '96 did not use a CCD bus system.

Question:
Would the following idea be a possible/simple solution?
Use the datalink connector (the one in which a diagnostic
tool is connected) and route the above-mentioned signals
(assuming that they are there) to the Central Timer Module?

Any comments or other suggestions would be greatly appreciated.

Bob
Burlington, Ontario

'97 CC Sport, 5.2L, 3.55, auto., 4x2