Pinpoint Test C: No Power In Run
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
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 SWITCH
- Carry out the Ignition Switch Component Test. Refer to COMPONENT TESTING.
- Is the ignition switch OK?
- YES : Go to C2.
- NO : INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.
- C2 CHECK VEHICLE EQUIPMENT
- Verify that the vehicle is equipped with a CDIM.
- Is the vehicle equipped with a CDIM?
- C3 ISOLATE THE CDIM
- Disconnect: CDIM C2500
- Connect a fused jumper wire between:
- CDIM C2500-1, circuit CDC63 (YE/OG), harness side and CDIM C2500-8, circuit CDC32 (BN/YE), harness side.
- CDIM C2500-7, circuit SBP27 (BU/RD), harness side and CDIM C2500-14, circuit CDC62 (WH/VT), harness side.
- Check for power with the ignition switch in the RUN position:
- Turn the ignition switch to the RUN position and operate the radio, windshield wipers or blower motor.
- Is power present with the ignition switch in the RUN position?
- C4 CHECK THE CDIM GROUND CIRCUIT GD133 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between CDIM C2500-11, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
- YES : Go to C5.
- NO : REPAIR circuit GD133 (BK). TEST the system for normal operation.
- C5 CHECK THE IGNITION AND CDIM RUN CIRCUITS FOR AN OPEN
- Disconnect: SJB C2280A
- Disconnect: SJB C2280B
- Disconnect: Run/Start Relay
- Measure the resistance between ignition switch C250-7, circuit CDC63 (YE/OG), harness side and CDIM C2500-1, circuit CDC63 (YE/OG), harness side.
- Measure the resistance between CDIM C2500-8, circuit CDC32 (BN/YE), harness side and SJB C2280A-4, circuit CDC32 (BN/YE), harness side.
- Measure the resistance between ignition switch C250-5, circuit CDC33 (VT/OG), harness side and SJB C2280A-3, circuit CDC33 (VT/OG), harness side.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and:
- SJB C2280B-45, circuit CDC34 (WH/OG), harness side.
- run/start relay cavity 85, circuit CDC34 (WH/OG), harness side.
- Are the resistances less than 5 ohms?
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
- YES : Go to C7.
- NO : REPAIR the affected circuit(s). TEST the system for normal operation.
- C6 CHECK THE IGNITION RUN CIRCUITS FOR AN OPEN
- Disconnect: SJB C2280A
- Disconnect: SJB C2280B
- Disconnect: Run/Start Relay
- Measure the resistance between ignition switch C250-7, circuit CDC32 (BN/YE), harness side and SJB C2280A-4, circuit CDC32 (BN/YE), harness side.
- Measure the resistance between ignition switch C250-5, circuit CDC33 (VT/OG), harness side and SJB C2280A-3, circuit CDC33 (VT/OG), harness side.
- Measure the resistance between ignition switch C250-1, circuit CDC34 (WH/OG), harness side and:
- SJB C2280B-45, circuit CDC34 (WH/OG), harness side.
- run/start relay cavity 85, circuit CDC34 (WH/OG), harness side.
- Are the resistances less than 5 ohms?
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
- YES : Go to C7.
- NO : REPAIR the affected circuit(s). TEST the system for normal operation.
- C7 CHECK FOR VOLTAGE AT THE RUN/START RELAY
- Measure the voltage between run/start relay cavity 30 and ground.
- Is the voltage greater than 10 volts?
- YES : Go to C8.
- NO
: VERIFY BJB fuse 46 (40A) is OK. If OK, REFER SYSTEM WIRING DIAGRAMS - F250 SUPER DUTY
to identify the possible causes of the open circuit. REPAIR as necessary. TEST the system for normal operation.
If not OK, REFER SYSTEM WIRING DIAGRAMS - F250 SUPER DUTY to identify the possible causes of the short circuit. REPAIR as necessary. TEST the system for normal operation.
- C8 CHECK CIRCUIT GD113 (BK/YE) FOR AN OPEN
- Measure the resistance between run/start relay cavity 86, circuit GD113 (BK/YE) and ground.
- Is the resistance less than 5 ohms?
- YES : Go to C9.
- NO : REPAIR circuit GD113 (BK/YE). TEST the system for normal operation.
- C9 CHECK THE RUN/START RELAY
- Carry out the Mini ISO Relay Component Test. Refer to COMPONENT TESTING.
- Is the relay OK?
- YES : Go to C10.
- NO : INSTALL a new run/start relay. TEST the system for normal operation.
- C10 CHECK THE SJB CONNECTORS
- Disconnect: SJB C2280A
- Disconnect: SJB C2280B
- Check the connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: SJB C2280A
- Connect: SJB C2280B
- Make sure the connectors are seated correctly, then operate the system and verify the concern is still present.
- Is the concern still present?
- YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. 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.