Doug_Baliko Posted May 24, 2015 Share Posted May 24, 2015 I would like to add a whelen TIR3 LED light as an auxiliary brake lite on my '12 RT. I would like the light to be off until I hit the brakes. Is there a brake light wire to tap that is only hot when you hit the brakes? Doug Link to comment
dirtrider Posted May 24, 2015 Share Posted May 24, 2015 Afternoon Doug Basically, NO. Your 09 hexhead uses a single wire for BOTH tail light & brake light with the tail light operating at a lower (pulsed/modulated) voltage (around 8 volts or so) You can TRY your LED array as SOME will work on the pulsed BMW systems but even IF it works you will have the LED's running at a lower power for running light then go brighter for brake light. If you insist on having it only work for brake light then you have to buy (or make) a transistorized circuit that reads the voltages & applies 12v to your array only when it sees brake light voltage input. OR add a stand alone brake switches (usually a hydraulic switch at a banjo fitting) that uses brake pressure to apply 12 volts directly to your LED array. Link to comment
Doug_Baliko Posted May 24, 2015 Author Share Posted May 24, 2015 Thanks DR. I don't know if makes any difference but my RT is a '12 cam head not an '09. Doug Link to comment
Dave_in_TX Posted May 24, 2015 Share Posted May 24, 2015 Thanks DR. I don't know if makes any difference but my RT is a '12 cam head not an '09. Doug No, it doesn't make any difference. Link to comment
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