Trouble Shooting

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION before disconnecting battery.

Check for blown fuses in underhood junction block or in instrument panel junction block. Check for open or short in instrument panel harness ground circuits located behind instrument cluster. Check for open or short in instrument cluster wiring circuit.

Check resistance of instrument cluster gauge circuits. See INSTRUMENT CLUSTER GAUGE CIRCUIT RESISTANCE table. Check resistance of instrument cluster indicator switches. See INSTRUMENT CLUSTER INDICATOR SWITCHES RESISTANCE table.

INSTRUMENT CLUSTER GAUGE CIRCUIT RESISTANCE

Sensor	Gauge Position	Ohms
Coolant Temperature	75°F (24°C)	2200-2900
Fuel Level	Empty	245-257
Fuel Level	Full	33-37
Oil Pressure	0 psi (0 kPa)	5-13
Oil Pressure	80 psi (552 kPa)	175-200

INSTRUMENT CLUSTER INDICATOR SWITCHES RESISTANCE

Switch	Switch Position	Ohms
Low Brake Fluid	Full	Open
Low Brake Fluid	Low	Less Than One
Low Coolant Level	Full	Less Than One
Low Coolant Level	Low	Open
Park Brake	Off	Open
Park Brake	On	Less Than One

Ensure all electrical connections are clean and tight. Ensure battery is fully charged. Repair or replace components and/or wiring as necessary.