Gauge Inoperative Or Inaccurate
- Disconnect fuel gauge sender connector. Fuel gauge sender connector is located in trunk, forward of spare tire. Connect variable resistance tester between fuel gauge sensor signal terminal (Purple wire) of fuel gauge sender connector and ground. See Fig 1.
- Set resistance dials on tester to zero ohms (Empty). Turn ignition on. If fuel gauge does not indicate empty, check for poor connections at instrument cluster and splice connections. Also check for an open or short to battery voltage in Purple wire (fuel gauge sensor signal). If connections and Purple wire are okay, replace instrument cluster.
- If fuel gauge indicates empty, set resistance dials on tester to 90 ohms (Full). If fuel gauge does not indicate full, check for poor connections at instrument cluster and splice connections. Also check for short to ground in Purple wire (fuel gauge sensor signal). If connections and Purple wire are okay, replace instrument cluster.
- If fuel gauge indicates full, ensure gauge values change with resistance as specified. See FUEL GAUGE SENDER RESISTANCE . If values do not change as specified, check for poor connection at instrument cluster. If connection is okay, replace instrument cluster.
- If values do change as specified, check for poor ground at fuel gauge sender. If fuel gauge sender ground is okay, check for mechanical clearance between float and tank interior. Repair loose, corroded or shorted wires and connections as necessary. If wires and connections are okay, replace fuel gauge sender.
FUEL GAUGE SENDER RESISTANCE
| Fuel Level | Ohms |
|---|---|
| Empty | 1.0 |
| 1/4 | 26 |
| 1/2 | 50 |
| 3/4 | 60 |
| Full | 88 |