Pinpoint Test C: No Power in RUN

Steering Column Switches

Pinpoint Test C: No Power in RUN

Refer to Wiring Diagram Set 13, Power Distribution/SJB for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

When the ignition switch is placed in the RUN position, fused ignition voltage is sent to the Smart Junction Box (SJB) along circuit CDC34 (WH/OG).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

- SJB (Smart Junction Box)

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 multimeter probes.

NOTE: Verify that battery voltage is greater than 10 volts.

C1 CHECK FOR VOLTAGE ON THE IGNITION RUN CIRCUIT

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) Fuse 42 (10A) (if equipped).

- Ignition ON.

- Measure the voltage between SJB (Smart Junction Box) fuse 42 (10A), circuit CDC34 (WH/OG), input side and ground.





Is the voltage greater than 10 volts?

Yes
GO to C2.

No
GO to C4.

C2 CHECK FOR VOLTAGE AT THE SJB (Smart Junction Box)

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) C2280B.

- Ignition ON.

- Measure the voltage between SJB (Smart Junction Box) C2280B-45, circuit CDC34 (WH/OG), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to C3.

No
GO to C5.

C3 CHECK THE SJB (Smart Junction Box) IGNITION SWITCH INPUT CIRCUIT FOR VOLTAGE

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) C2280E.

- Ignition ON.

- Measure the voltage between SJB (Smart Junction Box) C2280E-1, circuit CDC34 (WH/OG), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to C10.

No
GO to C6.

C4 CHECK THE SJB (Smart Junction Box) IGNITION SWITCH INPUT CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: SJB (Smart Junction Box) C2280A.

- Disconnect: Ignition Switch C250.

- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJB (Smart Junction Box) C2280A-4, circuit CDC34 (WH/OG), harness side.





Is the resistance less than 5 ohms?

Yes
GO to C7.

No
REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C5 CHECK THE IGNITION RUN CIRCUIT FOR AN OPEN

- Disconnect: Ignition Switch C250.

- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJB (Smart Junction Box) C2280B-45, circuit CDC34 (WH/OG), harness side.





Is the resistance less than 5 ohms?

Yes
GO to C9.

No
REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C6 CHECK THE IGNITION SWITCH OUTPUT CIRCUIT FOR AN OPEN

- Disconnect: Ignition Switch C250.

- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and SJB (Smart Junction Box) C2280E-1, circuit CDC34 (WH/OG), harness side.





Is the resistance less than 5 ohms?

Yes
GO to C9.

No
REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C7 CHECK THE IGNITION RUN CIRCUIT FOR A SHORT TO GROUND

- Disconnect: SJB (Smart Junction Box) C2280B.

- Disconnect: SJB (Smart Junction Box) C2280E.

- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to C8.

No
REPAIR circuit CDC34 (WH/OG). TEST the system for normal operation.

C8 CHECK THE IGNITION SWITCH

- Carry out the Ignition Switch component test. Component Tests and General Diagnostics

Did the ignition switch pass the component test?

Yes
GO to C10.

No
INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.

C9 CHECK FOR CORRECT IGNITION SWITCH OPERATION

- Carry out the Ignition Switch component test. Component Tests and General Diagnostics

Did the ignition switch pass the component test?

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

No
INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.

C10 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect: All SJB (Smart Junction Box) connectors.

- Check the SJB (Smart Junction Box) connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.


- Connect: All SJB (Smart Junction Box) connectors and make sure the connectors are seated correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

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