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Pinpoint Test C: No Power in RUN




Steering Column Switches

Pinpoint Test C: No Power in RUN

Refer to Wiring Diagrams Set 13, Power Distribution for schematic and connector information. Electrical Diagrams

Normal Operation

When the ignition switch is placed in the RUN position, fused ignition voltage is sent to the Central Junction Box (CJB) and Battery Junction Box (BJB).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

PINPOINT TEST C : NO POWER IN RUN

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

C1 CHECK THE IGNITION RUN CIRCUITS FOR VOLTAGE

- Ignition OFF.

- Disconnect: BJB (Battery Junction Box) Fuel Pump Diode.

- Disconnect: BJB (Battery Junction Box) Ignition Relay.

- Disconnect: CJB (Central Junction Box) Fuse 152 (7.5A) (if equipped).

- Disconnect: CJB (Central Junction Box) Fuse 158 (10A).

- Disconnect: CJB (Central Junction Box) Fuse 161 (7.5A) (if equipped).

- Disconnect: CJB (Central Junction Box) Fuse 162 (7.5A).

- Disconnect: CJB (Central Junction Box) Fuse 179 (7.5A).

- Disconnect: CJB (Central Junction Box) Rear Window Defrost Relay (if equipped).

- Disconnect: CJB (Central Junction Box) Blower Motor Relay.

- Ignition ON.

- Measure the voltage between ground and:
- BJB (Battery Junction Box) fuel pump diode, circuit 15-DA1 (GN/YE) input side.

- BJB (Battery Junction Box) ignition relay pin 1, circuit 15-DA1 (GN/YE).

- If equipped, CJB (Central Junction Box) fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).

- CJB (Central Junction Box) blower motor relay pin 85, circuit 15-DA1 (GN/YE).






Is the voltage greater than 10 volts for all circuits?

Yes
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

No
GO to C2.

C2 CHECK THE IGNITION RUN CIRCUITS FOR AN OPEN

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Measure the resistance between ignition switch C250-1, circuit 15-DA1 (GN/YE), harness side and:
- BJB (Battery Junction Box) fuel pump diode, circuit 15-DA1 (GN/YE) input side.

- BJB (Battery Junction Box) ignition relay pin 1, circuit 15-DA1 (GN/YE).

- If equipped, CJB (Central Junction Box) fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).

- CJB (Central Junction Box) blower motor relay pin 85, circuit 15-DA1 (GN/YE).






Is the resistance less than 5 ohms for all circuits?

Yes
GO to C3.

No
REPAIR the affected circuit(s). TEST the system for normal operation.

C3 CHECK THE IGNITION RUN CIRCUITS FOR A SHORT TO GROUND

- Measure the resistance between ground and:
- BJB (Battery Junction Box) fuel pump diode, circuit 15-DA1 (GN/YE) input side.

- BJB (Battery Junction Box) ignition relay pin 1, circuit 15-DA1 (GN/YE).

- If equipped, CJB (Central Junction Box) fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.

- CJB (Central Junction Box) fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.

- If equipped, CJB (Central Junction Box) rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).

- CJB (Central Junction Box) blower motor relay pin 85, circuit 15-DA1 (GN/YE).






Is the resistance greater than 10,000 ohms for all circuits?

Yes
INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.

No
REPAIR the affected circuit(s). TEST the system for normal operation.

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