ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 8333 > < Initial Inspection and Diagnostic Overview|Page 8331
Page 5
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Yes

For DTC B2045 or DTC B2047, GO to J7.

For DTC B2044 or DTC B2046, GO to J10.

No

For vehicles with LED rear lamps, GO to J7.

For vehicles with incandescent rear lamps, GO to J13.

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J7 CHECK FOR VOLTAGE TO THE REAR LAMP JUMPER HARNESS

 

-

Disconnect: Inoperative Rear Lamp.

-

While applying the brake pedal, measure the voltage between the LH rear lamp C498-3, circuit CLS18 (GY/BN), harness side and ground; or
between the RH rear lamp C499-3, circuit CLS19 (VT/OG), harness side and ground.

-

Is the voltage greater than 10 volts?

Yes

GO to J9.

No

GO to J8.

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J8 CHECK THE REAR STOPLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

 

-

Disconnect: SJB C2280d.

-

Measure the resistance between the LH rear lamp C498-3, circuit CLS18 (GY/BN), harness side and the SJB C2280d-25, circuit CLS18 (GY/BN),
harness side; or between the RH rear lamp C499-3, circuit CLS19 (VT/OG), harness side and the SJB C2280d-26, circuit CLS19 (VT/OG),
harness side.

-

Is the resistance less than 5 ohms?

Yes

GO to J13.

No

Initial Inspection and Diagnostic Overview|Page 8333 > < Initial Inspection and Diagnostic Overview|Page 8331