Jeep Grand Cherokee WJ - Electroluminescent gauges 2002

WJ clusters and gauges

Electroluminescent description		02 Gauge layout diagram
White-face gauge options		Cluster removal

New Electroluminescent gauges are included on the 2002 Limited & Overland models.

Electroluminescent gauges technical description:

This new instrument cluster is an ElectroMechanical Instrument Cluster (EMIC) module. The EMIC, including the mounts and the electrical connections, are concealed behind the cluster bezel. The EMIC gauges and indicators are protected by an integral clear plastic cluster lens, and are visible through a dedicated hooded opening in the instrument panel top pad. Just behind and integral to the cluster lens are the cluster hood and cluster mask, which are constructed of molded black plastic.

Two cluster masks are used: A base version features a black matte face and no trim ring around the perimeter of each gauge opening, while a premium version features a black matte face and a raised trim ring around the perimeter of each gauge opening. The cluster hood serves as a visor and shields the face of the cluster from ambient light and reflections to reduce glare, while the cluster mask serves to separate and define the individual gauges of the EMIC.

The cluster mask features two large round openings near its center through which the two major gauges are visible, and two smaller round openings stacked at the outboard side of each of the large openings through which the four minor gauges are visible. The cluster mask and the dial faces of the gauges are laminated plastic units. The dark, visible surface of the mask and the gauge dial faces are the outer layer or overlay, which is translucent. The darkness of this outer layer prevents the cluster from appearing too cluttered or busy by concealing the cluster indicators that are not illuminated, while the translucence of this layer allows those indicators and 1 icons that are illuminated to be readily visible. The underlying layer of the cluster mask overlay is opaque and allows light from the various indicators behind it to be visible through the outer layer of the mask and gauge dial faces only through predetermined cutouts.

On the base instrument clusters the graphics, increments, and numerals on the gauge faces are also translucent and illuminated from behind, while the orange gauge pointers are illuminated internally. On the premium instrument clusters the graphics, increments, numerals and gauge needles are opaque while the remainder of the gauge faces are translucent and illuminated from behind by an electroluminescent lamp. The EMIC electronic circuitry is protected by a molded plastic rear cover that features several round access holes for service of the incandescent cluster indicator and illumination lighting lamps and a large rectangular access hole for the EMIC connector receptacle.

Twelve versions of the instrument panel module are offered on Grand Cherokees, two base and ten premium. These versions accommodate all of the variations of optional equipment and regulatory requirements for the various markets in which the vehicle is offered. This module utilizes integrated circuitry and information carried on the Programmable Communications Interface (PCI) data bus network for control of all gauges and many of the indicators.

Note the styling differences between the 2001 and 2002 gauges

White-face gauge options

2002 Gauge cluster and housing

Many people have inquired as to whether they can buy the 2002 gauges and install them into 1999-2001 models. Unfortunately, The 2002 electroluminescent gauge clusters are only available on an exchange basis through the dealer, and only for the exact same model year. They must also be reprogrammed for mileage. This policy is usually strictly adhered to in order to maintain and control odometer integrity. Even if you were to obtain a 2002 cluster, it is unlikely that the gauges would install and work properly in previous models. The wiring socket was changed starting in 2002, and there are differences in the PCI signal routing.

Some owners have successfully installed 2001 Limited white face gauges into 1999 and 2000 models, purchasing just the individual gauges and installing them into the existing cluster assembly. This method bypasses the added expense, exchange hassles and problems associated with trying to obtain an entire cluster, as the original odometer is left intact. However, buying a new set of the '01 Limited gauges will still set you back more than $300. You might be available to find a complete 2001 Limited cluster at a junkyard for a reasonable price, they are around $600 new. I believe all domestic WJ clusters from 1999-2001 are interchangeable as far as directly plugging in and working. There are some minor differences in the warning lights, which I will try to document for these pages in the future.

2001 Limited White-Face Gauges
Speedometer	P/N 5018112AA
Tachometer	P/N 5018113AA
Temp & Oil	P/N 5018114AA
Fuel & Volt	P/N 5018115AA

White-face overlays are now under development for the WJ clusters, and should be available in October, 2002. I will post the information and pics here as soon as they are available.

Owners of 1987-2002 YJ/TJ Jeeps looking for white-face gauges should check out JeepWhiteGauges.com

Removing the gauge cluster

The gauge cluster can be easily removed on all WJ models. First, remove the cluster bezel trim piece (shown above left). It is held in place by 4 spring clips, one at each corner, and pulls straight out. On the left side, you can reach your thumb behind the bezel rubber at the tilt wheel lever cut-out and pull forward. If so equipped, you'll need to unhook the Adjustable Pedals harness from the back of the bezel.

Next, remove the 4 phillips screws on the cluster assembly, two along the top and two on the bottom. At the two upper screw holes there are recessed tabs that must be slightly pried down to release the cluster, which you can then pull outward and away. There is plenty of slack allowed to unhook the single 9-wire/12-pin connector.

WARNING: On vehicles equipped with the premium instrument cluster, the cluster circuitry provides an alternating current to supply power to the electroluminescent illumination lamp through a pigtail wire and connector that is accessible at the back of the cluster housing. Use proper precautions when handling this unit during diagnosis or service to avoid electrical shock and possible personal injury.

Front and back of the 2002 Electroluminescent cluster. Amazingly, the entire cluster assembly with hood and clear lens weighs only 38 ounces.

2002 Cluster harness pin-out

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