Component Testing

Relay Test

1. Test between the normally closed switch terminals, if any, for 0 ohms.
2. Test between the normally open switch terminals for infinite ohms.
3. Test between each switch terminal and either coil terminal for infinite ohms.
4. Connect the relay coil terminals to ground and fused power to energize the relay.
5. Test between each switch terminal and each coil terminal for 0 volts.
6. Test between the normally closed switch terminals, if any for infinite ohms.
7. Test between the normally open switch terminals for 0 ohms.

AIR Pump Dynamic Test 

Connect the AIR pump to appropriately fused battery voltage and ground and observe for a pressurized airflow at the pump outlet.

• If pressurized airflow is not observed, replace the pump.

AIR Solenoid Valve Dynamic Test 

Apply appropriately fused battery voltage and ground to the solenoid terminals and verify that the valve opens and closes completely as voltage is applied to and removed from the solenoid terminals. Observe that the valve is not obstructed or leaking.

• If the valve operates incorrectly, leaks, or is obstructed, remove the obstruction or replace the valve.