Component Testing

AIR pump Dynamic Test

1. Install a 50-amp fused jumper wire between the B+ terminal and 12 volts. Install a jumper wire between the ground terminal and ground.
2. Observe for a pressurized air flow at the pump outlet.
   • If a pressurized air flow is not observed, replace the AIR pump.

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.