Pinpoint Test 1

PINPOINT TEST 1: INCORRECT/ERRATIC DIRECTION OF AIRFLOW FROM OUTLET(S)

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Normal Operation
The function selector switch directs vacuum to the appropriate vacuum control motor(s), controlling the door movement.

Possible Causes
- vacuum hose(s) restricted or broken
- vacuum control motor
- airflow control door(s)
- function selector switch
- A/C vacuum check valve
- A/C vacuum reservoir tank
- stuck or bound linkage or door

NOTE: Because of the materials used in construction of the vacuum hoses, never pinch the vacuum hoses off during diagnosis to locate a leak. A wood golf tee can be used as a plug when it is necessary to plug one end of a vacuum hose for leak test purposes.