Pinpoint Test C: No Power in Run - Vehicles With an Ignition Switch

Steering Column Switches

Pinpoint Test C: No Power in ON - Vehicles With an Ignition Switch

Refer to Wiring Diagram Set 13, Power Distribution for schematic and connector information. Diagrams By Number

Normal Operation

The switch side of the ignition relay receives fused battery voltage from Battery Junction Box (BJB) fuse 7 (60A). When the ignition switch is in the ON position, voltage is provided to Central Junction Box (CJB) fuses 19 (7.5A), 20 (10A), 21 (10A), 22 (7.5A), 23 (10A), 26 (7.5A) and the coil side of the ignition relay.

This pinpoint test is intended to diagnose the following:

- CJB fuse(s)
- Wiring, terminals or connectors
- Ignition switch

PINPOINT TEST C: NO POWER IN ON - VEHICLES WITH AN IGNITION SWITCH

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 FOR POWER TO CJB FUSE 19 (7.5A)

- Disconnect: CJB Fuse 19 (7.5A).
- Ignition ON.
- Measure the voltage between CJB fuse 19 (7.5A), circuit CDC33 (VT/GN), input cavity and ground.




- Is the voltage greater than 10 volts?

Yes
GO to C2.

No
GO to Pinpoint Test B. Pinpoint Test B: No Power in ACC - Vehicles With an Ignition Switch

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C2 CHECK FOR POWER TO THE SWITCH SIDE OF THE IGNITION RELAY

- Disconnect: Ignition Relay.
- Measure the voltage between ignition relay cavity 3, circuit SBB07 (WH/RD), and ground.




- Is the voltage greater than 10 volts?

Yes
GO to C3.

No
VERIFY BJB fuse 7 (60A) is OK.

If OK, REPAIR circuit SBB07 (WH/RD).

If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. REPAIR as necessary. Diagrams By Number

TEST the system for normal operation.

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C3 CHECK FOR POWER AT THE COIL SIDE OF THE IGNITION RELAY

- Measure the voltage between ignition relay cavity 1, circuit CDC32 (BN/YE), and ground.




- Is the voltage greater than 10 volts?

Yes
GO to C4.

No
GO to C5.

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C4 CHECK THE IGNITION RELAY COIL GROUND CIRCUIT FOR AN OPEN

- Measure the resistance between ignition relay cavity 2, circuit GD145 (BK/BU), and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new ignition relay. TEST the system for normal operation.

No
REPAIR circuit GD145 (BK/BU). TEST the system for normal operation.

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C5 CHECK THE IGNITION ON CIRCUIT FOR AN OPEN

- Measure the resistance between ignition switch C250-1, circuit CDC32 (BN/YE), harness side and ignition relay cavity 1, circuit CDC32 (BN/YE).




- Is the resistance greater than 10,000 ohms?

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

No
REPAIR circuit CDC32 (BN/YE). TEST the system for normal operation.

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