Spark

Park, License, and/or Tail Lamps Malfunction

Battery voltage is supplied at all times to the coil and switch sides of the park lamp relay located in the under bonnet fuse block. When the headlamp switch is placed in the PARK LIGHT or DIPPED BEAM position, I/P fuse block energises the park lamp relay by applying ground to the park lamp relay control circuit. When the park lamp relay is energised, the relay switch contacts close and battery voltage is applied through the park lamp fuses to the park lamp supply voltage circuit which illuminates the park, number plate, and tail lamps.

1. Ignition ON, turn the headlamp switch to the headlamps ON position. The headlamps should illuminate.

⇒	If the headlamps do not illuminate, refer to Headlamps Malfunction .

2. Ignition ON, command the park lamps ON and OFF using the headlamp switch. The park, number plate, and tail lamps should turn ON and OFF when changing between commanded states.

⇒	If all of the lamps do not turn ON and OFF as specified, refer to Park Lamp Relay Malfunction.

⇒	If one or more of the lamps do not illuminate, refer to Park or Tail Lamp Malfunction.

Park Lamp Relay Malfunction

1. Ignition OFF, disconnect the park lamp relay.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 85 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

4. Headlamp switch OFF, connect a test lamp between the relay control circuit terminal and B+. The test lamp should not illuminate.

⇒	If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, refer to Headlamp Switch Malfunction.

5. Turn the headlamps ON, The test lamp should illuminate.

⇒	If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, refer to Headlamp Switch Malfunction.

6. Connect a 10 A fused jumper wire between the relay switch B+ circuit terminal 30 and the relay switch control circuit terminal 87. The park lamps should illuminate.

⇒	If the park lamps do not illuminate, test the control circuit for a short circuit to ground or an open/high resistance.

7. If all circuits test normal, test or replace the park lamp relay.

Park or Tail Lamp Malfunction

1. Ignition OFF, disconnect the wiring harness plug at the inoperative park, number plate, and tail lamp assembly.
2. Test for less than 5.0 Ω between the ground circuit terminal of the appropriate component listed below and ground.

•	Left or right park lamp assembly terminal 3

•	Left or right tail lamp assembly ground terminal

•	Number plate lamp assembly terminal 1

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal of the appropriate component listed below and ground.
4. Ignition OFF, command park lamps ON and OFF using the indicator/multi-function switch. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the park lamp relay.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance.

5. If all circuits test normal, test or replace the bulb or lamp assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.