Pinpoint Test N: The Left Rear Heated Seat Is Inoperative - Does Not Operate In High: Overview
WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
- N1 CHECK THE HEATED SEAT SWITCH INPUT TO THE HEATED SEAT MODULE
- Key in OFF position.
- Disconnect: Left Rear Heated Seat Module C3162.
- Measure the resistance between left rear heated seat module C3162-8, circuit 8-HC21 (WH/GN), harness side and ground while pressing the heated seat switch.
- Is the resistance less than 50 ohms when the heated seat switch is pressed and greater than 10,000 ohms when the heated seat switch is not pressed?
- Yes : INSTALL a new heated seat module. TEST the system for normal operation.
- No : GO to N2.
- N2 CHECK CIRCUIT 8-HC21 (WH/GN) FOR OPEN OR SHORT TO GROUND
- Disconnect: Left Rear Heated Seat Switch C722.
- Measure the resistance between left rear heated seat switch C722-2, circuit 8-HC21 (WH/GN), harness side and left rear heated seat module C3162-8, circuit 8-HC21 (WH/GN), harness side; and between left rear heated seat switch C722-2, circuit 8-HC21 (WH/GN), harness side and ground.
- Is the resistance less than 1 ohm between the heated seat switch and the heated seat module and greater than 10,000 ohms between the heated seat switch and ground?
- Yes : GO to N3.
- No : REPAIR circuit 8-HC21 (WH/GN). TEST the system for normal operation.
- N3 CHECK CIRCUIT 8-HC21 (WH/GN) FOR SHORT TO VOLTAGE
- Key in ON position.
- Measure the voltage between the left rear heated seat module C3162-8, circuit 8-HC21 (WH/GN), harness side and ground.
- Is voltage present?
- Yes : REPAIR circuit 8-HC21 (WH/GN). TEST the system for normal operation.
- No : INSTALL a new heated seat switch. TEST the system for normal operation.