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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Perhaps I'm doing something wrong but I've searched that manual via your link and have yet to find any results for third brake, third-brake, or 3rd brake. Any suggestions for isolating that circuit?
CHMSL (Center High Mounted Stop Light) is what the factory calls it