Circuit/System Testing

Ignition OFF, disconnect the X1 harness connector at the A33 Media Disc Player.
Test for less than 10 Ω between the ground circuit terminal 7 and ground.
- If 10 Ω or greater
1. Ignition OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, repair the open/high resistance in the ground connection.
- If less than 10 Ω
Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF, remove the test lamp.
2. Test for less than 2 Ω in the B+ circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF, remove the test lamp.
2. Test for infinite resistance between the B+ circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
- If the test lamp illuminates
Ignition On/Vehicle in Service Mode.
Test for 9-13 V between the control circuit terminal 10 and ground.
- If not 9-13 V.
  Repair the open/high resistance in the circuit.
- If 9-13 V.
Replace the A33 Media Disc Player.