Tech Tips

Troubleshooting - Ground-Based Electrical Problems

Applies To:

Discovery I | '94-'96

Poor grounds can cause numerous problems. The following are main ground locations and the components they effect. To clean the contact surface, remove the fastener and use a wire brush to clean the post, connector and nut as needed. Spraying on a little contact cleaner may help, too. If the contact point is painted, a star washer can also be added to improve the connection.

Check these ground locations:

• Right inner fender, behind the battery. Battery and EMC on 1994 & 1995 models.
• Below the battery, inside the right frame rail. Battery ground.
• Right of the left cylinder head. ECU, A/C compressor clutch on 1994 & 1995 models.
• Right frame rail, inside the wheel well. Starter.
• Left footwell, behind trim panel. ECM, key switch, radio, OBDII data link.
• Right footwell, behind trim panel. Starter solenoid relay, park-neutral position switch, alarm, data link connector.
• Left side of luggage compartment, behind access panel for taillights, above light assembly. Fuel pump, fuel level sensor.

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