Instrument Cluster / Carrier: Description and Operation

Speedometer-Odometer
The speedometer-odometer is hardwired to the Powertrain Control Module (PCM). The vehicle speed signal is transmitted directly from the PCM to the speedometer-odometer. The PCM receives its signal from the Vehicle Speed Sensor (VSS).

Safety Belt Warning Indicator
The safety belt warning indicator receives its ground from the warning chime module. When the driver safety belt is buckled it provides the ground for the warning chime module. The safety belt warning indicator prove out is in the RUN position and is controlled by the warning chime module.

Brake Warning Indicator
The brake warning indicator receives its ground signals from the following sources:
^ the parking brake switch provides a ground when the parking brake is depressed
^ the dual brake warning switch provides a ground when there is low brake pressure
^ the Anti-lock Brake System (ABS) control module provides a ground when it senses an ABS system malfunction.

The ignition switch provides the brake warning indicator prove out by supplying a ground when it is in the START position.

Anti-lock Brake System (ABS) Warning Indicator
The ABS warning indicator receives its ground from the ABS module when a malfunction is detected in the ABS system. The ABS warning indicator prove out is in the RUN position and is controlled by the ABS module.

SERVICE ENGINE SOON Warning indicator
The SERVICE ENGINE SOON warning indicator receives its ground from the Electronic Engine Control (EEC) module. The SERVICE ENGINE SOON warning indicator prove out flashes in the RUN position and is controlled by the EEC.

Air Bag Warning Indicator
The air bag warning indicator receives a ground from the Electronic Crash Sensor (ECS) module when a system malfunction or deployment has occurred. The air warning indicator prove out is in the RUN position and is controlled by the ECS module.