The Autoswitch works by looking for a 0.8 to 10.8 seconds pulse from your turn signal cancel button wire. On all modern R and K series BMW motorcycles the turn signals are canceled by tapping the cancel button. This button sends a digital pulse plus varies the voltage to tell the chassis computer to turn off the turn signal.

AS6B model: To activate the driving light relay ON or OFF you push and hold the turn signal cancel button for 0.8 to 10.8 seconds. During the time you should release the button for the relay to click over, the LED flashes red-green quickly. Actually just by remembering to hold the cancel button for an extended period such as 1 to 10 seconds to let go is all you need. The LED glows red when lights are off and green with lights ON. The LED is not really necessary unless you prefer the reminder.

AS6B2 model: To activate the driving light relay ON or OFF you push twice quickly on the TSC, the LED flashes red-green quickly inside the time of the 2 pulses. Actually just by remembering to tap twice quickly (quick sequence). The LED glows red when lights are off and green with lights ON. The LED is not really necessary unless you prefer the reminder.

Of course if your turn signal was ON when you want to activate the relay, you will also turn off the turn signal.

For normally canceling the turn signal just do the usual short interval push and release. Most riders including this writer hold that for half a second at the most.

All Autoswitches return to the OFF state once powered down. So when you start up the bike again you must turn on the driving lights again using the same simple sequence.

Installing the Autoswitch will not alter your existing wiring and can never cause a malfunction to your existing circuits. The Autoswitch simply taps any 12 volt wire after the ignition switch for power and turn-signal-cancel button control wire Add connections to ground and the coil of the auxiliary light relay and you have installed the Autoswitch!

We have done and photographed a 2005 R1200GS and a 2006 K1200GT. These should represent all the R and K series for chassis computer location, connection points for the sensor wire and the blue-white wire color to confirm. We will welcome and can make incentive arrangements to add your other R and K bike installs to our database and web page. We also need help on the latest CAN-BUS F series bikes.

An excellent source of power for the Autoswitch circuit will be the charger/accessory jack power panel. With or without the BMW Y-Harness adapter available from dealers.

Connect the Black lead to a chassis ground. You may need to extend the black lead with a piece of scrap wire to reach a suitable frame or battery ground point.

The Violet wire controls your lights. If you are using a Cycle Gadgets lighting kit, attach the Violet wire to the Alternate Control Harness. For other lighting solutions, attach it to the +12V coil terminal on the light kit relay.

There are many options for mounting the LED, depending on the amount of effort you want to put into it. You can drill a hole small enough for just the lens of the LED in the dash and use silicone adhesive to hold it in from behind, fasten with a cable clip at the front of the fuel tank, etc. We have found that it's pretty easy to get the hang of the Autoswitch timing without a visual cue, so you may find it adequate to just coil up the LED under the seat and not use it at all.

For additional information, please view our "Relay Basics for the Novice" page.

The Autoswitch is easy to install. If you already have auxiliary driving lights installed with a controlling toggle switch and relay, Put the Autoswitch VIOLET and the BLACK wire where your toggle was connected on the relay coil pins. Tap the RED into any ignition-swtiched 'ON' wire for power, YELLOW-ORANGE wire to the turn-signal cancel button wire. Add connections to ground, and neatly tuck the Autoswitch and wires out of the way in any convenient location. And without building a bracket, drilling any holes, or modifying your dash, you’re done!

Click here to download complete detailed instructions as an Adobe pdf file.

CAN-BUS BMW bikes series R and K have included the signal cancel feature and anything else should not be used.

LED dimensions details:

This LED has a lens on top. The housing is a 5mm diameter, 7mm tall. There is a 1mm long flange at the bottom thats 6mm diameter. The wire underneath needs aproximately 20mm before a full bend can be made. This stiffness is only due to all the layers of protective heat shrink tubing. By modifying this area the bottom of the LED wire secion can be set up much smaller.

LED info:

The LED is a bi-color. Red or Green. It changes color by getting the voltage on the feed wire reversed by the processor. LED flashes fast red to green during button pressing. LED shines steady RED to indicate the AS circuit has power. It changes to steady GREEN if the violet wire is powering the relay (so the aux lights would be ON.) The wire is 6 to 7 feet long. It should never be cut or altered due to the danger of damaging the processor chip. If the wires are shorted when the Autoswitch is powered up, the processor chip will be instantly ruined.

Further tech info about converting the LED to be a bulb, or changing to a different LED entails custom work, info and configurations we do not have available at this time.

A relay is nothing more than a remotely located switch that you activate using a small switch or computer. The reason for a relay is to allow switching on and off high currents. Such currents like 10, 20, and 30 amps would make a toggle switch too big and impossible for a fragile logic circuit. So you control a relay using a small, low cost toggle switch or a computer circuit. You let the relay do the hard work. The relay then has an IN and OUT (usually reversible) high current pins that break the high current line between the battery and the large lights.

The relay has inside an electromagnetic coil, like an electromagnet. This coil usually draws very little current, such as 30, 50 or 100 mA (0.03 0.05 or 0.10 Amp) When the logic circuit or small toggle puts power across this coil it closes the high power contacts inside the relay. You hear a click on and a click off.

Most relays have a small drawing on the housing to tell you which 1 or 2 of the 3 or 4 pins are the coil and which are the actual switched contacts. If you dont know you can run some tests with a 12V battery, trying different combos of 2 until you get a click!

If the relay is in a metal housing, It may have only ONE pin for the coil. The second pin, or ground is the housing which must be mounted direct to chassis or otherwise grounded. If your relay is in a plastic housing it will have 2 pins for the coil, usually reversible. Your toggle switch is breaking the 12v power line between one side of coil and power.

The Autoswitch VIOLET wire feeds a small amount of 12V power to one side of the coil, in the same manner as your small toggle. The Autoswitch has an extra ground wire in case you have a 2 pin coil on the relay.

But you can also just ground that 2nd coil pin and ignore (cut off) the extra ground wire on Autoswitch. Autoswitch gets ground from the other BLACK wire, it uses for its own circuit.

We hope this has helped those who are electrically challenged and we welcome comments and changes to this text.