A Operation check
- Install the hand vacuum pump to the nipple "A" of solenoid.
- Use the jumper wire to connect the solenoid terminal with the battery terminal.
- Disconnecting the jumper wire at the negative (-) battery side, apply the vacuum pressure. Check the airtightness.
Jumper wire Nipple "B" state Normal state Connected Opened Negative pressure leaks Closed Negative pressure maintained Disconnected Opened Negative pressure maintained