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 Post subject: Looking for a switch
PostPosted: Fri Mar 18, 2016 6:39 am 
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Joined: Oct 28, 2008
Motorcycle: 1986 Kawasaki Vulcan 750
Rebel: Other
Country: USA
State/Province: VA
City: Roanoke
I'm getting ready to install some driving lights on the 750, and would like to wire them with a switch that has an Off, On, and Automatic mode, like the dome light control in most cars. Where can I get a small, motorcycle appropriate switch that would do that? I'd like to use the high beam switch as the trigger for the automatic mode, so the aux lights would be off on low beam, on with high. The output of the switch would then go to a relay to trigger the lights.

So (in my mind) the switch would have the following connections:
Ground pin
Input +12v pin
Input from high beam (0 in low beam, +12v in high)
Output pin (0 in Off, +12v in On, +12v in Auto if high beam input is +12v)

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 Post subject: Re: Looking for a switch
PostPosted: Fri Mar 18, 2016 6:53 am 
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Joined: Oct 28, 2008
Motorcycle: 1986 Kawasaki Vulcan 750
Rebel: Other
Country: USA
State/Province: VA
City: Roanoke
I guess I could do this with an SPDT switch and an additional relay. One of the On outputs goes directly to the light control relay, the other goes to a relay that uses the high beam input as a trigger, then outputs to the original light relay. Is there a better way?

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 Post subject: Re: Looking for a switch
PostPosted: Fri Mar 18, 2016 9:41 am 
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Joined: Feb 23, 2009
Motorcycle: Rebel 250 plus a few others
Rebel: 250
Country: Canada
State/Province: NB
City: Fredericton
Why would you need a relay? If you use a single pole double throw switch with a center off position you could wire the lights off the common pole and put your hot and switched 12 volts to the two terminals.

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 Post subject: Re: Looking for a switch
PostPosted: Fri Mar 18, 2016 9:44 am 
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Joined: Oct 28, 2008
Motorcycle: 1986 Kawasaki Vulcan 750
Rebel: Other
Country: USA
State/Province: VA
City: Roanoke
Oh, I didn't realize that it used separate power inputs. That's perfect!

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 Post subject: Re: Looking for a switch
PostPosted: Fri Mar 18, 2016 10:32 am 
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Joined: Feb 23, 2009
Motorcycle: Rebel 250 plus a few others
Rebel: 250
Country: Canada
State/Province: NB
City: Fredericton
Well you can switch power from 2 sides to the middle or from the middle to either side depending on what you're trying to do.

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2004 Honda Rebel 250
2003 BMW K1200GT
2004 BMW R1200GS
1996 Ducati 900SS
1973 Norton 850 Interstate


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 Post subject: Re: Looking for a switch
PostPosted: Fri Mar 18, 2016 10:40 am 
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Joined: Oct 28, 2008
Motorcycle: 1986 Kawasaki Vulcan 750
Rebel: Other
Country: USA
State/Province: VA
City: Roanoke
Thanks - I'm not sure why that confused me at first. So I'd use the middle as the output to a relay for the lights, and one outer pins for input from keyed power and the other from the high beam. Makes perfect sense now.

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