Ignition Timing Connector: Testing and Inspection

Ignition Timing Vacuum Switch:

Ignition Timing Vacuum Switch Test Chart:

1. Disconnect switch from ignition module.
2. Connect suitable ohmmeter across switch terminals and compare resistance measured to ``less than'' values in the Ignition Timing vacuum Switch Test chart.
3. Apply vacuum to switch, using an outside vacuum source. Compare resistance now measured across switch terminals to ``greater than'' values in the Ignition Timing vacuum Switch Test chart.
4. Replace switch if resistance is not within specifications.