I have a 2001 Silverado that I am wiring in a plug for my 5th wheel... there is one Light Blue wire that is coded/marked CHMSL Does anyone have any idea what this wire is for.. the other wires are marked
Brown - parking lamps
lt green - back up
drk green - R turn
yellow - L turn
Drk Blue - Elec Brakes
Red - Battery
White - Ground
Lt Blue - Chmsl ????????? this is the mystery wire???
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