Mechanical Instrument Cluster Description

The Ram Truck MIC is available in 2 different versions, low line and high line. The lowline cluster has seventeen indicators lamps and the highline has eighteen indicators lamps. The gauges are positioned with information received by the cluster over the CCD bus from the PCM. Some of the warning lamps are hardwired and the cluster using the CCD bus information controls some. The MIC is hardwired to he [1][2]CTM to provide the warning lamp announcement chimes.

There is a self test available for the cluster that will actuate all the gauges at their calibration points. The test will not run if the cluster sees engine RPM or vehicle speed. This test will light all CCD controlled lamps for verification of lamp operation. It also forces the odometer Vacuum Fluorescent Display (VFD) to perform a segment check. The self test routine can be entered by pushing and holding the trip reset button while rotating the ignition key from the "OFF" to the "ON" position. When the word "chec" appears release the knob and the test will continue.

The cluster will provide bus bias and termination and the engine controller provides a second termination. If the cluster is disconnected the bus will not be biased.

The cluster will be service as an assembly. There will be limited parts available, bulbs and sockets, the front lens, the trip odometer stem cover and the rear cover assembly. No internal parts of the cluster will be serviced.