Operation CHARM: Car repair manuals for everyone.

Choke Thermostat/Heater: Testing and Inspection

1973
1. Disconnect electrical heating element from control switch.
2. Connect an ohmmeter between the crimped junction of this wire at the choke end, and ground.

NOTE: Do not connect to the steel heater casing.

3. Electrical resistance of 4-6 ohms is normal. If ohmmeter reading indicates an open or short, replace choke assembly.

1974-82
1. Disconnect B+ wire from control switch.
2. Connect an ohmmeter between an exposed portion of the choke wire connector at the switch (not the B+ terminal), and ground.
3. Electrical resistance of 4-12 ohms is normal. If ohmmeter reading indicates an open or short, replace choke assembly.