Component Testing

M74 Window Motor - Test

1. Ignition/Vehicle & All vehicle systems - Off
2. Disconnect the appropriate electrical connector: M74 Window Motor
3. Connect a 25 A fused jumper wire between the test points: Control terminal 1 & B+
4. Momentarily connect a jumper wire between the test points: Control terminal 2 & Ground

   Reverse the jumper wires 2 times between the terminals.

   Verify the component works as specified: M74 Window Motor = Up & Down

   • If not the specified state 

     Replace the component: M74 Window Motor

   • Go to next step: If the specified state 
5. All OK.

S79P Window Switch - Passenger - Test

1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S79P Window Switch - Passenger
3. Test for infinite resistance between the test points:
   • Ignition terminal A & Control terminal D - Switch - Not Pressed
   • Ignition terminal A & Control terminal H - Switch - Not Pressed
   • If less than infinite resistance 

     Replace the component: S79P Window Switch - Passenger

   • Go to next step: If infinite resistance 
4. Test for less than 3 ohms between the test points:
   • Control terminal D & Control terminal F - Switch - Not Pressed
   • Control terminal H & Control terminal G - Switch - Not Pressed
   • If 3 ohms or greater 

     Replace the component: S79P Window Switch - Passenger

   • Go to next step: If less than 3 ohms 
5. Operate the component: S79P Window Switch - Passenger - Pressed & Pulled
6. Test for less than 3 ohms between the test points:
   • Ignition terminal A & Control terminal F
   • Ignition terminal A & Control terminal G
   • If 3 ohms or greater 

     Replace the component: S79P Window Switch - Passenger

   • Go to next step: If less than 3 ohms 
7. All OK.

S79D Window Switch - Driver - Test

1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: S79D Window Switch - Driver
3. Test for infinite resistance between the test points:
   • Ignition terminal C & Control terminal A - Switch - Not Pressed
   • Ignition terminal C & Control terminal D - Switch - Not Pressed
   • Ignition terminal C & Control terminal G - Switch - Not Pressed
   • Ignition terminal C & Control terminal H - Switch - Not Pressed
   • If less than infinite resistance 

     Replace the component: S79D Window Switch - Driver

   • Go to next step: If infinite resistance 
4. Test for less than 3 ohms between the test points:
   • Ground terminal F & Control terminal A - Switch - Not Pressed
   • Ground terminal F & Control terminal D - Switch - Not Pressed
   • Ground terminal F & Control terminal G - Switch - Not Pressed
   • Ground terminal F & Control terminal H - Switch - Not Pressed
   • If 3 ohms or greater 

     Replace the component: S79D Window Switch - Driver

   • Go to next step: If less than 3 ohms 
5. Operate the component: S79D Window Switch - Driver - Pressed & Pulled
6. Test for less than 3 ohms between the test points:
   • Ignition terminal C & Control terminal G
   • Ignition terminal C & Control terminal H
   • If 3 ohms or greater 

     Replace the component: S79D Window Switch - Driver

   • Go to next step: If less than 3 ohms 
7. Operate the component: Passenger Window Switch @ S79D Window Switch - Driver - Pressed & Pulled
8. Test for less than 3 ohms between the test points:
   • Ignition terminal C & Control terminal A
   • Ignition terminal C & Control terminal D
   • If 3 ohms or greater 

     Replace the component: S79D Window Switch - Driver

   • Go to next step: If less than 3 ohms 
9. All OK.