Pinpoint Test C4 - Check Power Supply To Headlight Control Module
Measure voltage on White/Green wire at headlight control module. If voltage is more than 10 volts, go to test C5. If voltage is less than 10 volts, service White/Green wire.
Measure voltage on White/Green wire at headlight control module. If voltage is more than 10 volts, go to test C5. If voltage is less than 10 volts, service White/Green wire.