Pinpoint Test C: No Power In Run
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
- C1 CHECK THE VOLTAGE SUPPLY TO THE IGNITION SWITCH
- Key in OFF position.
- Disconnect: Ignition Switch C250
- Measure the voltage between ground and:
- ignition switch C250-7, circuit 37 (YE), harness side.
- ignition switch C250-12, circuit 37 (YE), harness side.
- ignition switch C250-2, circuit 325 (DB/OG), harness side.
- ignition switch C250-9, circuit 1050 (LG/VT), harness side.
- Are the voltages greater than 10 volts?
- YES : Go to C2.
- NO
: Verify that CJB fuse 103 (30A) is OK. If OK, REPAIR circuit 1050 (LG/VT).
Verify that CJB fuse 116 (30A) is OK. If OK, REPAIR circuit 325 (DB/OG).
Verify that CJB fuse 110 (30A) is OK. If OK, REPAIR circuit 37 (YE).
TEST the system for normal operation.
- C2 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch Component Test. Refer to COMPONENT TESTING.
- Does the ignition switch test OK?
- YES : Go to C3.
- NO : INSTALL a new ignition switch. REFER to Ignition Switch in this article. TEST the system for normal operation.
- C3 CHECK THE VOLTAGE SUPPLY TO THE CENTRAL JUNCTION BOX (CJB)
- Connect: Ignition Switch C250
- Disconnect: CJB C270c
- Key in ON position.
- Measure the voltage between ground and:
- CJB C270c-4, circuit 16 (RD/LG), harness side.
- CJB C270c-5, circuit 687 (GY/YE), harness side.
- CJB C270c-6, circuit 964 (DB/LG), harness side.
- CJB C270c-1, circuit 1040 (RD/BK), harness side.
- Are the voltages greater than 10 volts?
- YES : REPAIR or INSTALL a new CJB. TEST the system for normal operation.
- NO : REPAIR the circuit(s) in question for an open. TEST the system for normal operation.