For 1990-2009 cars

#### Body Control Module (BCM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Ignition ON/Engine OFF/Vehicle in PARK/Park Brake Released/Headlamps in AUTO/All Doors Closed
Battery Voltage Signal | Data | Volts | Varies
Ambient Light Sensor | Data | Volts | 1.75 Volts Maximum Light to 4.9 Volts Maximum Dark
Dimming Potentiometer | Data | Volts | Varies
Ignition Off/Run/Crank | Inputs | Active/Inactive | Active
Ignition 1 Run/Crank | Inputs | Active/Inactive | Active
Driver Door Ajar Sw. | Inputs | Door Closed/Door Ajar | Door Closed
Passenger Door Ajar Sw. | Inputs | Door Closed/Door Ajar | Door Closed
High Beam Select Switch | Inputs | Active/Inactive | Inactive
Headlamp On Switch | Inputs | Active/Inactive | Inactive
Headlamp Off Switch | Inputs | Active/Inactive | Inactive
Front Fog Lamp Switch | Inputs | Active/Inactive | Inactive
Courtesy Lamp Switch | Inputs | Active/Inactive | Inactive
Dome Lamp Override Switch | Inputs | On/Off | Off
Cargo Lamp Switch | Inputs | Active/Inactive | Inactive
Hazard Lamp Switch | Inputs | Active/Inactive | Inactive
Park Lamp Switch | Inputs | On/Off | Off
Park Brake Switch | Inputs | Released/Applied | Released
Front Wipers Active | Inputs | Yes/No | No
Inadvertent Power Cmd. | Outputs | On/Off | On
LF Turn/Hazard Lamp Command | Outputs | On/Off | Off
LR Turn/Hazard Lamp Command | Outputs | On/Off | Off
RF Turn/Hazard Lamp Command | Outputs | On/Off | Off
RR Turn/Hazard Lamp Command | Outputs | On/Off | Off
DRL Status | Outputs | On/Off | Varies
Headlamp Relay | Outputs | On/Off | Varies
High Beam Relay Command | Outputs | On/Off | Off
Park Lamps Signal | Outputs | On/Off | Varies
Courtesy Lamp Output | Outputs | On/Off | Off
Fog Lamp Relay Cmd. | Outputs | On/Off | Off