Control Module

Refer to Speed Control Wiring Diagrams. Prior to performing any tests, ensure servo or valve body and electronic module are properly tested.

Fig. 10 Speed control wiring diagram. 1986 Mini-Vans/Wagons:

1986-87 MINI-VANS/WAGONS

The electronic module is rarely the cause of erratic system performance and should not be replaced if speed can be maintained within 5 mph of the selected speed on a level road.
1. Connect negative lead of a voltmeter to chassis ground and positive lead to pin No. 7 of module electrical connector.
2. While driving vehicle at 40-50 mph, turn speed control switch to On position and ensure voltmeter indicates 12 volts.
3. Press and release speed control Set button and ensure voltmeter indicates a fluctuating 5-9 volts. If system is not controlling throttle to maintain "set" speed, replace electronic module.