E 450 V8-5.4L (2009)
Go To Pinpoint Test G. See: Pinpoint Test G: All The Stoplamps Are Inoperative
No
For cutaway and stripped chassis vehicles, GO to H2.
For wagon, GO to H11.
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H2 MONITOR THE STOPLAMP SWITCH INPUT (CUTAWAY AND STRIPPED CHASSIS)
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Ignition ON.
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Enter the following diagnostic mode on the scan tool: SJB DataLogger.
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Monitor the SJB stoplamp switch PID (GEM_BOO) while applying the brake pedal.
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Does the PID indicate the brake pedal is applied?
Yes
GO to H4.
No
GO to H3.
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H3 CHECK THE STOPLAMP SWITCH INPUT TO THE SJB (CUTAWAY AND STRIPPED CHASSIS VEHICLES)
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Ignition OFF.
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Disconnect: SJB C2280b.
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While applying the brake pedal, measure the voltage between the SJB C2280b-40, circuit CCB08 (VT/WH), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to H22.
No
REPAIR circuit CCB08 (VT/WH) for an open. TEST the system for normal operation.
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H4 CHECK FOR VOLTAGE TO THE BODY BUILDER CONNECTOR (STOPLAMP SWITCH OUTPUT)
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Ignition OFF.
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Disconnect: Body Builder C432.
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While applying the brake pedal, measure the voltage between the body builder C432-3, circuit CCB08 (VT/WH), harness side and ground.
