Vacuum Switching Valve Vacuum Passage Test

Connect a 12 volt power supply to connector of vacuum switching valve as shown in illustrations. Each of the passages indicated directly under electrical hookup illustrations ("ON") should be clear to each other. Disconnect power supply. Only those passages indicated directly under electrical hookup illustrations ("OFF") should be clear to each other. To test, blow air or smoke through various passages. If defective, replace vacuum switching valve.

Fig 1: VACUUM PASSAGE TEST (3K-C & 18R-C)

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Fig 2: VACUUM PASSAGE TEST (2T-C)

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Fig 3: VACUUM PASSAGE TEST (F)

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Fig 4: VACUUM PASSAGE TEST (4M)

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