Vacuum Switch
Disconnect plug from 8 prong relay box and connect voltmeter to terminals 7 & 8. With engine idling, voltmeter should read zero volts. Disconnect vacuum line from vacuum switch, reading should now be 13 volts.
Disconnect plug from 8 prong relay box and connect voltmeter to terminals 7 & 8. With engine idling, voltmeter should read zero volts. Disconnect vacuum line from vacuum switch, reading should now be 13 volts.