Dimmer wall switch for interior LED lights?
I just switched my old tube florescent lights out with dim-able LED strips. I bought a DC dimmer wall switch for the lights but it had 4 wires and there was no way to install into my 2 wire system. ...
Forum Discussion
ScottG wrote:Gdetrailer wrote:ScottG wrote:
There are a bunch of them on eBay. Just search for RV led dimmer.
2 Wires?
Not so sure about that unless they are nothing more than a variable resistor.
DC electronics will need at least THREE WIRES in order to work.
Input + from battery
Battery "ground" (-)
Output + (variable 12V DC) to lights
Since OP has only 2 wires to work with they will most likely have to run a battery "ground" (-) to the switch location.
I suspect that the OPs wiring is only Battery + and the switched + that returns to the light fixture and no battery (-) to be had...
They're not just pots and they don't need three wires if they have full 12v coming in because they use that to power an appropriate circuit.
Here are examples:
Simple surface mount
Wall mount led dimmer
I have both of these.
OP said they only have TWO wires.
That means they do not have 12V NEGATIVE GROUND where their switch is.
The item you selected NEEDS the 12V NEGATIVE GROUND in order to work.
Please note, the two terminals marked (V-) in the picture from your link. Those ARE for the 12V NEGATIVE GROUND CONNECTION.
That device WILL NOT WORK without a connection from the 12V NEGATIVE GROUND.
The OP WILL have to run a separate 12V NEGATIVE GROUND to make that or any other dimmer work.
This can be tricky to impossible in a typical trailer wall to fish wires.
