Circuit/System Description

Ground is applied at all times to the turn signal/multifunction switch. When the turn signal/multifunction switch is placed in either the turn right or turn left position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM sends this message to the trailer lighting converter. The trailer lighting converter then applies a voltage to the appropriate trailer turn signal lamps through there respective voltage supply circuits.