Component Testing

Passenger/Rear Window Motor Test

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear M74 Window Motor.
2. Install a 20 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M74 Window Motor should perform the UP and DOWN functions.
   • If the M74 Window Motor does not perform the UP and DOWN functions 

     Replace the passenger or rear M74 Window Motor.

   • If the M74 Window Motor performs the UP and DOWN functions 
3. All OK

Passenger/Rear Window Switch

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear S79 Window Switch.
2. Test for infinite resistance between the ignition terminal and the control terminal listed below with the switch in the center position.
   • Ignition terminal 5 and control terminal 1
   • Ignition terminal 5 and control terminal 3
   • Ignition terminal 5 and control terminal 4
   • Ignition terminal 5 and control terminal 6
   • If less than infinite resistance 

     Replace the passenger or rear S79 Window Switch.

   • If infinite resistance 
3. Test for less than 2 Ω between the control terminals listed below with the switch in the center position.
   • Control terminal 1 and control terminal 3
   • Control terminal 4 and control terminal 6
   • If 2 Ω or greater 

     Replace the passenger or rear S79 Window Switch.

   • If less than 2 Ω 
4. Test for less than 2 Ω between the ignition terminal 5 and the control terminal 1 with the switch in the Up position.
   • If 2 Ω or greater 

     Replace the passenger or rear S79 Window Switch.

   • If less than 2 Ω 
5. Test for less than 2 Ω between the ignition terminal 5 and the control terminal 4 with the switch in the Down position.
   • If 2 Ω or greater 

     Replace the passenger or rear S79 Window Switch.

   • If less than 2 Ω 
6. All OK