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mokragleski's avatar
mokragleski
Explorer
Dec 12, 2015

Cruise Control Does not work when towing 5th wheen

Issue I have a 2004 Dodge Ram 2500 5.9d. Starting in 2015, when I tow my 37 Ft. Larado, the cruise control will not work. Cruise control works fine when not towing. Replaced the transmission at...
Tow Vehicles
_40Fan's avatar
_40Fan
Explorer
Dec 14, 2015
shepstone wrote:
Me Again wrote:
2002 got rid of the vacuum cruise control. It has to be brake light switch feedback from the trailer. Do your brake light come on steady when plugged in? Chris

I was only a couple of years off! :)


You were right. Dodge used vacuum on their trucks up to 2004.

If I could get photobucket to work, I'd upload a picture of the wiring diagram to prove it.

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