Instrument Cluster Circuit Tests
NOTE:
Unless specified otherwise, use a DVOM with a minimum input impedance of 10-megohms during testing.
Disconnect instrument cluster harness connectors "A", "B", "C" and "D". See Figure and Fig 1 . Using DVOM, test each circuit from harness side of appropriate connector under condition listed. See INSTRUMENT CLUSTER INPUT CIRCUIT TEST TABLE .
INSTRUMENT CLUSTER INPUT CIRCUIT TEST
| DVOM Connection | Condition | Specification | |
|---|---|---|---|
| Twin Trip & ODO Switch | |||
| A1 & B4 | ODO/TRIP Switch Free | No Continuity | |
| A1 & B4 | ODO/TRIP Switch Pushed | Continuity | |
| A2 & B4 | RESET Switch Free | No Continuity | |
| A2 & B4 | RESET Switch Pushed | Continuity | |
| DOME Fuse: B2 & GND | Constant | Batt. Voltage | |
| Park/Neutral Switch | |||
| C2 & GND | Ign. On, Selector In "P" Position | Batt. Voltage | |
| C3 & GND | Ign. On, Selector In "R" Position | Batt. Voltage | |
| C4 & GND | Ign. On, Selector In "N" Position | Batt. Voltage | |
| D1 & GND | Ign. On, Selector In "D" Position | Batt. Voltage | |
| D2 & GND | Ign. On, Selector In "3" Position | Batt. Voltage | |
| D3 & GND | Ign. On, Selector In "2" Position | Batt. Voltage | |
| C12 & GND | Ign. On, Selector In "L" Position | Batt. Voltage | |
| Generator "L" Terminal | |||
| D13 & GND | Engine Off | Continuity | |
| D13 & GND | Engine Running | Batt. Voltage | |
| Fuel Gauge Sender | |||
| D21 & B5 | Float Position Full | About 4.6 Volts | |
| D21 & B5 | Float Position 1/2 | About 2.4 Volts | |
| D21 & B5 | Float Position Empty | About 0.3 Volts | |
| D21 & D22 | Ign. On | About 5.0 Volts | |
| Turn Signal & Hazard Switch | |||
| C10 & GND | Hazard Switch On | Fluctuates 0-Batt. Voltage | |
| C10 & GND | Turn Switch, Right Turn | Fluctuates 0-Batt. Volts | |
| C6 & GND | Hazard Switch On | Fluctuates 0-Batt. Voltage | |
| C6 & GND | Turn Switch, Left Turn | Fluctuates 0-Batt. Voltage | |
| Headlight Switch | |||
| B8 & C8 | Headlights On, Dimmer Low | No Voltage | |
| B8 & C8 | Headlights On, Dimmer High Or Flash | Batt. Voltage | |
| Ignitor: B3 & GND | Engine Running | Voltage Fluctuates | |
| Pattern Select Switch: B10 & B1 | Ign. On, Pattern Switch PWR | No Voltage | |
| Oil Level Warning Switch | |||
| D17 & GND | Oil Temp. Above 131°F, Float Down | No Continuity | |
| D17 & GND | Oil Temp. Below 131°F | Continuity | |
| D17 & GND | Oil Temp. Above 131°F, Float Up | Continuity | |
| Ground | |||
| B6 & GND | Constant | Continuity | |
| B16 & GND | Constant | Continuity | |
| GAUGE Fuse | |||
| B1 & GND | Ign. Switch ACC, START | No Voltage | |
| B1 & GND | Ign. Switch ON | Batt. Voltage | |
| PWR-IG Fuse | |||
| B7 & GND | Ign. Switch LOCK, ACC, START | No Voltage | |
| B7 & GND | Ign. Switch ON | Batt. Voltage | |
| Light Control Rheostat: A7 & GND | Lights On, Turn Rheostat | Varying Voltage | |