Circuit/System Testing

Windshield Wiper/Washer Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch. It may take up to 5 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
   • If 10 Ω or greater 
   1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
   2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
   • Go to next step: If less than 10 Ω 
3. Ignition ON.
4. Verify the scan tool Windshield Wiper High Speed Switch parameter is Inactive.
   • If not Inactive 
   1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
   2. Test for infinite resistance between the signal circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
   • Go to next step: If Inactive 
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2.
6. Verify the scan tool Windshield Wiper High Speed Switch parameter is Active.
   • If not Active 
   1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the K9 Body Control Module, ignition ON.
   2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
   3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
   • Go to next step: If Active 
7. Test for 8 V or greater between the signal circuit terminal 3 and ground.
   • If less than 8 V 
   1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
   2. Test for infinite resistance between the signal circuit and ground
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
   3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
   • Go to next step: If 8 V or greater 
8. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module, ignition ON.
9. Test for less than 1 V between the S82 Windshield Wiper/Washer Switch signal circuit terminal 3 and ground.
   • If 1 V or greater 

     Repair the short to voltage on the circuit.

   • Go to next step: If less than 1 V 
10. Test or replace the S82 Windshield Wiper/Washer Switch.

Windshield Wiper Motor Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 38 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.
   • Go to next step: If less than 10 Ω 
3. Connect the X2 harness connector at the X50A Fuse Block-Underhood and disconnect the X4 harness connector at the K9 Body Control Module, ignition ON.
4. Verify the M75 Windshield Wiper Motor low wiping speed is not activated.
   • If the M75 Windshield Wiper Motor low wiping speed is activated 
   1. Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood.
   2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 16 X4 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.
   • Go to next step: If the M75 Windshield Wiper Motor low wiping speed is not activated 
5. Connect a 3 A fused jumper wire between the control circuit terminal 16 and B+.
6. Verify the M75 Windshield Wiper Motor low wiping speed activates.
   • If the M75 Windshield Wiper Motor low wiping speed does not activate 
   1. Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse Block-Underhood.
   2. Test for infinite resistance between the control circuit and ground.
      • If less than Infinite resistance, repair the short to ground on the circuit.
      • Go to next step: 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, test or replace the X50A Fuse Block-Underhood.
   • Go to next step: If the M75 Windshield Wiper Motor low wiping speed activates 
7. Replace the K9 Body Control Module.

Windshield Wiper Speed Control Malfunction

1. Ignition OFF, disconnect the X4 and X5 harness connectors at the K9 Body Control Module, ignition ON.
2. Connect a 3 A fused jumper wire between the K9 Body Control Module control circuit terminal 16 X4 and B+.
3. Verify the M75 Windshield Wiper Motor high wiping speed is not activated.
   • If the M75 Windshield Wiper Motor high wiping speed is activated 
   1. Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood.
   2. Test for infinite resistance between the K9 Body Control Module control circuit terminal 24 X5 and ground.
      • If less than Infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, test or replace the X50A Fuse Block-Underhood.
   • Go to next step: If the M75 Windshield Wiper Motor high wiping speed is not activated 
4. Connect a 3 A fused jumper wire between the K9 Body Control Module control circuit terminal 24 X5 and ground and a 3 A fused jumper wire between the control circuit terminal 16 X4 and B+.
5. Verify the M75 Windshield Wiper Motor high wiping speed activates.
   • If the M75 Windshield Wiper Motor high wiping speed does not activate 
   1. Ignition OFF, remove the jumper wires, disconnect the X2 harness connector at the X50A Fuse Block-Underhood, ignition ON.
   2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 24 X5 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
   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, test or replace the X50A Fuse Block-Underhood.
   • Go to next step: If the M75 Windshield Wiper Motor high wiping speed activates 
6. Replace the K9 Body Control Module.

Windshield Wiper Park Feature Malfunction

1. Ignition OFF, disconnect the harness connector at the M75 Windshield Wiper Motor.
2. Connect a test lamp between the control circuit terminal 3 and the ground circuit terminal 5
3. Ignition ON, verify that a test lamp turns ON and OFF when cycling the S82 Windshield Wiper/Washer Switch between the Off and Low positions
   • If test lamp does not turn ON 
   1. Ignition OFF, remove the test lamp, disconnect the X4 harness connector at the K9 Body Control Module.
   2. Test for infinite resistance between the control circuit and ground.
      • If less than Infinite resistance, repair the short to ground on the circuit.
      • Go to next step: 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, test or replace the K9 Body Control Module.
   • If test lamp does not turn OFF 
   1. Ignition OFF, remove the test lamp, disconnect the X4 harness connector at the K9 Body Control Module.
   2. Test for less than 1 V between the control circuit terminal and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, test or replace the K9 Body Control Module.
   • Go to next step: If the test lamp turns ON and OFF 
4. Replace the M75 Windshield Wiper Motor.