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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> Power Windows Malfunction >> Circuit/System Testing >> Test 3
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Test 3

  1. Ignition/Vehicle & All vehicle systems» Off
    NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.
  2. Disconnect the electrical connector: S79P Window Switch - Passenger
  3. Test for less than 10 Ω between the test points: Ground circuit terminal 1 & Ground
    • If 10 Ω or greater 
    1. Ground Connection» Disconnect
    2. Test for less than 2 Ω between the test points: Ground circuit terminal 1 @ Component harness & Ground Connection
      • 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 
  4. Ignition » On / Vehicle » In Service Mode
  5. Verify the scan tool parameter: Passenger Window Switch at Door=Inactive
    • If not the specified state 
    1. Ignition/Vehicle» Off
    2. Disconnect the electrical connector: M74P Window Motor - Passenger
    3. Test for infinite resistance between the test points:
      • Signal circuit terminal 7 @ Component harness & Ground
      • Signal circuit terminal 8 @ Component harness & Ground
      • If less than infinite resistance» Repair the short to ground on the circuit.
      • If infinite resistance» Replace the component: M74P Window Motor - Passenger
    • If the specified state 
  6. Momentarily connect a 3 A fused jumper wire between the test points: Signal circuit terminal 8 @ Component harness & Ground
  7. Verify the scan tool parameter: Passenger Window Switch at Door=Up
    • If not the specified state 
    1. Ignition/Vehicle» Off & Remove» Jumper wire(s)
    2. Disconnect the electrical connector: M74P Window Motor - Passenger
    3. Ignition» On / Vehicle» In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 8 @ Component harness & Ground
      • If 1 V or greater» Repair the short to voltage on the circuit.
      • If less than 1 V
    5. Ignition/Vehicle» Off
    6. Test for less than 2 Ω between the test points: Signal circuit terminal 8 @ Component harness & Terminal 3 @ M74P Window Motor - Passenger
      • If 2 Ω or greater» Repair the open/high resistance in the circuit.
      • If less than 2 Ω» Replace the component: M74P Window Motor - Passenger
    • If the specified state 
  8. Momentarily connect a 3 A fused jumper wire between the test points: Signal circuit terminal 7 @ Component harness & Ground
  9. Verify the scan tool parameter: Passenger Window Switch at Door=Down
    • If not the specified state 
    1. Ignition/Vehicle» Off & Remove» Jumper wire(s)
    2. Disconnect the electrical connector: M74P Window Motor - Passenger
    3. Ignition» On / Vehicle» In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 7 @ Component harness & Ground
      • If 1 V or greater» Repair the short to voltage on the circuit.
      • If less than 1 V
    5. Ignition/Vehicle » Off
    6. Test for less than 2 Ω between the test points: Signal circuit terminal 8 @ Component harness & Terminal 3 @ M74P Window Motor - Passenger
      • If 2 Ω or greater» Repair the open/high resistance in the circuit.
      • If less than 2 Ω» Replace the component: M74P Window Motor - Passenger
    • If the specified state 
  10. Test for greater than 10 V between the test points: Signal circuit terminal 6 @ Component harness & Ground
    • If 10 V or less 
    1. Ignition/Vehicle » Off
    2. Disconnect the electrical connector: M74P Window Motor - Passenger
    3. Test for infinite resistance between the test points: Signal circuit terminal 6 @ Component harness & Ground
      • If less than infinite resistance» Repair the short to ground on the circuit.
      • If less than infinite resistance
    1. Ignition/Vehicle» Off
    2. Test for less than 2 Ω between the test points: Signal circuit terminal 6 @ Component harness & Signal circuit terminal 5 @ M74P Window Motor - Passenger
    • If 2 Ω or greater» Repair the open/high resistance in the circuit.
    • If less than 2 Ω» Replace the component: M74P Window Motor - Passenger
    • If the specified state 
  11. Test or replace the component: S79P Window Switch - Passenger