Diagnostic Routine M

Diagnostic Routine M

Diagnostic Overview

A Single Power Window is Inoperative - LH Front, Base

Refer to Wiring Diagram Set 100 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The LH (Left Hand) front window motor is bi-directional. Window direction is determined by the polarity of the voltage and ground being supplied to the motor from the master window control switch integral electronics.

Pinpoint Test

1. CHECK THE LH (Left Hand) FRONT WINDOW CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Disconnect: LH (Left Hand) Front Window Control Switch C535B.

3. Measure:





Is the resistance less than 3 ohms?








2. CHECK THE LH (Left Hand) FRONT WINDOW CONTROL SWITCH OPERATION

1. Ignition ON.

2. To check upward window operation, connect fused jumper wires:





3. To check downward window operation, connect fused jumper wires:





Does the window move up and/or down?








3. CHECK FOR AN OPEN CIRCUIT BETWEEN THE LH (Left Hand) WINDOW CONTROL SWITCH AND WINDOW MOTOR

1. Ignition OFF.

2. Disconnect: LH (Left Hand) Front Window Motor.

3. Measure:





Are the resistances less than 3 ohms?