Pinpoint Test P: The LH/RH Turn Indicator Is Never On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test P: The LH/RH Turn Indicator Is Never On

Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information. Diagrams By Number

Normal Operation

When the multifunction switch is in the LH TURN position, on/off voltage is sent from the multifunction switch to the Instrument Cluster (IC) through the LH turn input circuit flashing the left turn signal indicator on and off. When the multifunction switch is in the RH TURN position, on/off voltage is sent from the multifunction switch to the IC through the RH turn input circuit flashing the left turn signal indicator on and off.

This pinpoint test is intended to diagnose the following:


- Wiring, terminals or connectors
- LH turn signal lamps
- RH turn signal lamps
- IC

PINPOINT TEST P: THE LH/RH TURN INDICATOR IS NEVER ON

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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P1 CHECK THE TURN SIGNAL LAMPS


- Ignition ON.
- Operate the LH and RH turn signal. Observe the LH and RH turn signal lamps.
- Do the LH and RH turn signal lamps operate correctly?

Yes
For the LH turn indicator, GO to P2.

For the RH turn indicator, GO to P3.

No
REFER to Exterior Lighting Testing and Inspection.

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P2 CHECK THE LH TURN INPUT CIRCUIT FOR VOLTAGE


- Ignition OFF.
- Disconnect: IC C2220 .
- Ignition ON.
- Operate the LH turn signal.
- Measure the voltage between the IC C2220-23, circuit 3 (LG/WH), harness side and ground.




- Does the voltage alternate between 0 volts and greater than 10 volts?

Yes
GO to P4.

No
REPAIR the circuit for an open. TEST the system for normal operation.

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P3 CHECK THE RH TURN INPUT CIRCUIT FOR VOLTAGE


- Ignition OFF.
- Disconnect: IC C2220 .
- Ignition ON.
- Operate the RH turn signal.
- Measure the voltage between the IC C2220-22, circuit 2 (WH/LB), harness side and ground.




- Does the voltage alternate between 0 volts and greater than 10 volts?

Yes
GO to P4.

No
REPAIR the circuit for an open. TEST the system for normal operation.

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P4 CHECK FOR CORRECT IC OPERATION


- Disconnect the IC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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