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2008 Dynaquest Dynamax 27ST - "Option" Rocker Switch Function - Freightliner Wiring Diagrams - Manuals

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M1redskin

RVF Regular
Joined
May 27, 2026
Messages
10
Location
OH
RV Year
2008
RV Make
Dynamax
RV Model
Dynaquest Dynamax 27ST
RV Length
27'
Chassis
M2 Freightliner
Engine
Mercedes MBE
TOW/TOAD
None
Fulltimer
No
Guys - recently chased the above. Nice motorhome with freightliner M2 106 chassis and Mercedes MBE 900 diesel. The dash panel has an option rocker switch (see pic) that I do not know what it was for. I realize this is probably an optional or customized function for the MH. Prior owner did not know what it was for.
Just thought I would take the chance and see if others with this style motorhome also had this "Option" rocker switch. It is not so easy to trouble shoot wiring on a freightliner as manuals are kept pretty tightly by the dealers and Dynaquest (Forest River) does not have any wiring diagram to offer in this age of motorhome.
I will and can figure it out by tracing wires back to the firewall bulkhead connectors or wherever they lead to perhaps since I have been able to find what the pinouts are for at the various plugins. I do know one radio wire for reverse signal comes from a wire on the back of this switch but hthere are numerous other wires on it. I also found out that Freightliner prints a unique number on every wire but sadly those are only available to Freightliner dealers as I understand it. That is unless someone happens to have a complete OEM manual to offer. Anyways - thanks for any feedback in advance.
 

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Optional switches were left to offer body builders options (pun intended). In Dynamax coaches, if it still bears the OPT label, it wasn't used for anything. I have one in my 2013 Dynaquest 360XL.
 
Well its got wires connected to the back of it so I don't know for sure yet. Thanks for the feedback!
 
Looks like the high, medium, and low engine braking that was on our M2 106 Newmar.

Were two switches for engine brake on / off and the other for how much.
 
Looks like the high, medium, and low engine braking that was on our M2 106 Newmar.

Were two switches for engine brake on / off and the other for how much.
Well that's interesting because I'll have to check if it is a momentary type action (as the prior guy suggested) or it is a regular switch, in which case it could only have two functions (one position or the other) At least I think so. I'll get back with both of you tomorrow when I return home. I have the other engine brake on/off you mentioned. Thanks again!
 

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