Sporadic or Intermittent Gauge Behavior
- Remove Instrument Cluster
- Unplug the connector harness and clean with contact cleaner
- Re-Plug the connectors firmly
If your connector pins are corroded and unusable, buy a new connector (Part Number 05016261)
If only the Speedometer is intermittently maxing itself out:
- Vehicle Speed Sensor might be going out
- Wiring up to the PCM (ECU) has a short
- If using a K&N FIJK Air intake, make sure the cone filter hasnt rubbed against the 2nd middle ECU wiring harness causing exposure.
- Instrument Cluster pin corrosion as mentioned above
No Instrument Cluster power/lights nor gauges not working at all or indicator lights are working but no gauges working:
- Check instrument cluster ground wire on the firewall
- Check Fuse #9 in Passenger kick panel
- Check 15amp Fuse in the Engine Bay Fuse panel. See https://www.youtube.com/watch?v=pbBXabZNPkA
Gauges working but no lights
- Clean or replace dimmer switch
Low or no Voltage
Possible causes :
- Bad alternator - have it tested.
- Bad voltage regulator in ecu - try different ecu or install an external regulator
- Poor battery connection or terminal corrosion