E 450 V10-6.8L (2008)
H7-H8
Test I: The Stoplamps Are On Continuously
PINPOINT TEST I: THE STOPLAMPS ARE ON CONTINUOUSLY
Normal Operation
When the brake pedal is applied, the stoplamp switch routes voltage through circuit 569 (DG) to the brake shift interlock actuator, the PCM, and the
central junction box (CJB) fuse 39 (10A). The CJB then routes the voltage through circuit 511 (LG) to the high mounted stoplamp, the trailer brake
control module (TBCM) (if equipped), and the multifunction switch. The multifunction switch then routes voltage to the rear lamps through circuits 9
(LG/OG) (LH rear lamp) and 5 (OG/LB) (RH rear lamp).
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
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Stoplamp switch
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Multifunction switch
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TBCM
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Brake shift interlock actuator
-
PCM
