Aux CHMSL wire

[John Ratajczak]

Looking at my trailer light plug today I found two wires marked Aux CHMSL pwr and CHMSL ground. What are these wires for. Thank you for any help.

 

[Richard Kolb]

trailer lights

 

[A K]

Center High Mounted Stop Lamp. Think a box trailer with a high rear lamp. Not many have them, though.

 

[Tom Schindler]

Think a bed cap.



I have never seen a CHMSL on a trailer or a wiring connection standard that is designed for it.



By law, if you install a cap on your bed, you have to have a center stop lamp.





Tom

 

[Todd Z]

They are for a bed cap...



Todd Z

 

[Scott Tanner]

you can also use it for the feed for the trailer brake controller, although I tapped into the fuse for that wire on the side of the dash...

 

[A K]

Doh. [Brain spasm.] That too.



Third brake lamps are novelties on toy haulers, especially for folks who match the rears to the rears of their RVs. I suppose they draw from the normal brake wire though.

 

[Richard Kolb]

By law, if you install a cap on your bed, you have to have a center stop lamp.

Must be a state thing, my truck has a cap with no working third brake light and I've passed inspection 3 times.