Dodge Repair: 98 PLY GR CARAVAN ELECTRICAL FREAKOUT, plymouth grand voyager, slide pots

Question
My 98 Plymouth Grand Voyager SE (3.3, el locks, no alarm) lost wipers, horn, A/C LEDs blinking, radiator fans not kicking on.  All research pointed to BCD, so changed BCD with salvage part (matched up P/N), but no joy.  We're totally puzzled.  Is this likely the "CCD bus", and can mere unqualfied "this is called a wrench?" mortals repair it?

Answer
ac blinking lights is this
COOLDOWN TEST ENTRY
TO INITIATE TESTS:
Set Blower motor ON HIGH
Set Mode position to Panel
Set Temperature to Cold (Both slide pots if equipped)
Depress WASH and A/C simultaneously for 5 Seconds
NOTE: If the evaporator is already cold, operate system with A/C OFF and the blower motor ON high for three minutes prior to starting test.

RESULTS:
All LED's will turn on for 5 Seconds (Until all LED's light)
Cooldown Test is running when A/C and RECIRC. are alternately flashing. If A/C and RECIRC. are flashing simultaneously, Cooldown has failed. Make sure that the Blower motor is ON high, and temperature is ON full Cold, abort test and repeat Calibration Diagnostic and Cooldown test again.
Calibration Test is running when REAR WIPER and INTERMITTENT LED's are alternately flashing.
After all tests have passed, Cooldown test can be run separately.
Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.


Rad fan is a relay under the air filter box

the horns could be from a clock spring there is a life time recall on this from Chrysler.

the door locks ,alarm,wipers and such would be a BCM and or a junction block to whicg u take that out in order to replace the BCM.