If you are blowing fuses this work instruction will walk you through an electrical test procedure that will determine if one of the following is true:
A. There are no wiring issues with the ERV
B. You have a bad circuit board and it needs to be replaced
C. There is a short in the wiring harness and you need to replace your harness
1. You will need a 7/16" wrench or socket and a multi-meter with probes to perform the test
2. Remove the manifold cover
3. Start the engine
4. Flip the power button to the "On" position
5. Turn the selector switch to the ERV position
6. Flip the ERV switch to the "ON" position
7. Attach the red probe to the "10A" plug and the black probe to the "COM" plug
8. Disconnect the green wire from the solenoid
9. Place the red probe on the coil post where the green wire was connected. Place the black probe in the connector of the green wire.
10. Press the brake button
11. The reading on the meter should be between 1 and 2 Amps.
Amperage between 1 and 2 = No wiring issue
Amperage lower than 1 = Bad circuit board (Order a replacement circuit board)
Amperage over 2 = Short in the wire harness (Order a replacement harness)
12. Disconnect the white wire from the coil
13. Place the red probe on the post where the white wire was connected. Place the black probe on the connector of the white wire.
14. Press the brake button.
15. The reading on the meter should be between 1 and 2 Amps.
Amperage between 1 and 2 = No wiring issue
Amperage lower than 1 = Bad circuit board (Order a replacement circuit board)
Amperage over 2 = Short in the wire harness (Order a replacement harness)
16. Connect the white wire back to the coil
