All Other Models
- Tape a thermometer close to the vacuum control temperature sensor, located inside air cleaner. Leave wing nuts off top of air cleaner so top can be removed quickly to check thermometer while performing tests.
- With a cold engine, temperature below vacuum control temperature sensor specifications, check air control door in air cleaner. It should be in the fully open position (open to outside air).
- Start engine and let run. As soon as engine starts, door should go to full heated air position (closed to outside air). Watch air control door. When door reaches full open position (outside air only), quickly take air cleaner top off and read thermometer. Compare thermometer reading with specification. If reading is not to specification, perform vacuum motor test before replacing sensor.