Testing an ignition switch is pretty straight forward.   In a previous post I showed the test I used with the switch wired into the circuit.  Since the switch was soldered into the circuit I questioned whether I was reading the resistance through the switch or through the wiring itself.   The correct way to test the switch is to disconnect the wires and test it as shown below.  It is a bit hard to see but I have the multimeter dial set to the 200 ohm range and I have the leads connected to the Bat. & Ign. terminals.  I checked the resistance in both the start and run position.  To test the starter circuit I simply connected the meter between the Bat. & Str. Terminals and held the key in the start position.

Faulty Ignition Switch

I located a good description of how to test starting circuit and the wiring to the starter on a site managed by Clark’s Garage.   There are some other good instruction here like how to test an ignition coil.  Here is a link to the full shop manual published on the web by Clark’s Garage.  CLICK HERE   Click on the link to their Garage Manual included on the left side of the screen.

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