Chart No. 1, Control Unit Power Supply Circuit Test

When the ignition and main switches are in the ON position current flows to the ignition switch, fuse 11 of the junction block, cruise control switch, control unit and ground.
Check control unit power supply, ECU terminal No. 2. When the cruise control main switch is ON, voltage measured should be approximately 12 volts.
Check control unit ground, ECU terminals No. 8, 14, and 22, no voltage should be present.
Repair wiring as needed.