The standard instrument cluster contains a microprocessor. The instrument cluster micro processor communicates with other modules in the vehicle over the Class 2 serial data line. The information passed over the Class 2 serial data line, along with dedicated circuits to specific sensors and modules, provides the inputs which are used to operate all the gauges, indicators and the message center in the cluster. The instrument cluster continuously process class 2 serial data in order to determine the correct values and states to display.

When replacing instrument panel cluster assembly, federal law requires that the odometer reading of the replacement unit be set to register the same mileage as the prior odometer. If the same mileage cannot be set, the law requires that the replacement odometer be set at zero and a label be installed on the drivers door frame to show the previous odometer reading and the date of replacement.

The instrument cluster includes the following components:

The mounting provision for the trailer electric brake module/controller is located directly beneath the steering column on the steel lower tie bar that runs the full length of the instrument panel. The mounting provision consists of 2 screw holes and indentations, allowing the installation of 2 U-nuts and screws to hold the trailer brake module/controller in position.

For information regarding the electrical harness connections of the trailer electric brake module/controller, refer to Exterior Lights Circuit Description in Lighting Systems.