Pinpoint Test C: No Power In RUN
Steering Column Switches
Pinpoint Tests
Pinpoint Test C: No Power in RUN
Refer to Wiring Diagram Set 13, Power Distribution for schematic and connector information. Diagrams By Number
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.
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C1 CHECK THE IGNITION RUN CIRCUITS FOR VOLTAGE
- Ignition OFF.
- Disconnect: BJB Fuel Pump Diode.
- Disconnect: BJB Ignition Relay.
- Disconnect: CJB Fuse 152 (7.5A) (if equipped).
- Disconnect: CJB Fuse 158 (10A).
- Disconnect: CJB Fuse 161 (7.5A) (if equipped).
- Disconnect: CJB Fuse 162 (7.5A).
- Disconnect: CJB Fuse 179 (7.5A).
- Disconnect: CJB Rear Window Defrost Relay (if equipped).
- Disconnect: CJB Blower Motor Relay.
- Ignition ON.
- Measure the voltage between ground and:
- BJB fuel pump diode, circuit 15-DA1 (GN/YE) input side.
- BJB ignition relay pin 1, circuit 15-DA1 (GN/YE).
- If equipped, CJB fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).
- CJB 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.
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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 fuel pump diode, circuit 15-DA1 (GN/YE) input side.
- BJB ignition relay pin 1, circuit 15-DA1 (GN/YE).
- If equipped, CJB fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).
- CJB 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.
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C3 CHECK THE IGNITION RUN CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between ground and:
- BJB fuel pump diode, circuit 15-DA1 (GN/YE) input side.
- BJB ignition relay pin 1, circuit 15-DA1 (GN/YE).
- If equipped, CJB fuse 152 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 158 (10A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB fuse 161 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 162 (7.5A), circuit 15-DA1 (GN/YE) input side.
- CJB fuse 179 (7.5A), circuit 15-DA1 (GN/YE) input side.
- If equipped, CJB rear window defrost relay pin 85, circuit 15-DA1 (GN/YE).
- CJB 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 Ignition Switch. TEST the system for normal operation.
No
REPAIR the affected circuit(s). TEST the system for normal operation.
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