Circuit/System Testing

Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the X50A Fuse Block - Underhood. It may take up to 2 min for all vehicle systems to power down.
Test for less than 10 Ω between the X50A Fuse Block - Underhood ground circuit terminal 32 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
Connect the X1 harness connector at the X50A Fuse Block - Underhood and disconnect the X4 harness connector at the K9 Body Control Module, ignition ON.
Verify the G24 Windshield Washer Pump is not activated.
- If the G24 Windshield Washer Pump is activated
1. Ignition OFF, disconnect the X1 harness connector at the X50A Fuse Block - Underhood, ignition ON.
2. Test for less than 1 V between the X50A Fuse Block - Underhood control circuit terminal 30 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, test or replace the X50A Fuse Block - Underhood.
- If the G24 Windshield Washer Pump is not activated
Connect a 10 A fused jumper wire between the control circuit terminal 14 X4 and B+.
Verify the G24 Windshield Washer Pump activates.
- If the G24 Windshield Washer Pump does not activate
1. Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the X50A Fuse Block - Underhood.
2. Test for infinite resistance between the X50A Fuse Block - Underhood control circuit terminal 30 X1 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the X50A Fuse Block - Underhood.
- If the G24 Windshield Washer Pump activates
Replace the K9 Body Control Module.