Things to Remember When Working With ACC

CAUTION: In order to avoid damage to the electronics in the ACC control module, proceed as follows:

^ When arc welding, unplug the negative lead from the battery, the regulator connection and the 25 pin or 39 pin connector from the ACC control module.

^ When taking measurements and conducting fault diagnosis, the 25 pin or 39 pin connector should be unplugged from the ACC control module.

^ From year model M1988:
The cooling fin on the ventilation fan speed control is live (+12 V) when the ignition is switched on. If the cooling fin is grounded, speed control is destroyed.