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Old 12-24-2008, 07:28 PM   #1
logan5
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some help/advice for hooking up new lights

So I bought a set of projector lights thinking of using them as headlights. The set came with a relay that I'm supposed to hook the lights to and then to the low beam wires. What's the relay for? Is it neccessary for the relay, can I just hook the lights directly to my low beam lights?

This set I bought are originally for cars (fog lights)
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Old 12-24-2008, 07:34 PM   #2
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The relay acts as an electric switch. The direct power then wire that goes to the aux lights is switched closed and allows power to go through when the other side(command side) of the relay has voltage going through it from the ignition or lowbeam switch. This way the lights will be turned off when key is off.

The reason you use the relay instead of robbing the low beam power, is so the wiring and fuse dont take on the additional load of the aux lighting. The relay takes little to no resistance versus the amperage the aux lights will be robbing from that relay. Too much resistance in lights or devices will cause an increase in amperage through the cicuit... and the fuse would likely be stressed since it is the weaker part of the system. If a fuse is popping, putting a large fuse in isnt the solution, cuz then you may be stressing the wires(may be too small for the load on them.)
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Old 12-24-2008, 08:05 PM   #3
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Show pics of projector lights
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Old 12-25-2008, 03:57 AM   #4
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Show pics of projector lights
I got the Hella DE Micor lights ..

http://www.tirerack.com/accessories/hella/micro_de.jsp
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Old 12-25-2008, 11:30 AM   #5
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Did you figure out what you are going to do w the wiring?
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Old 12-25-2008, 02:28 PM   #6
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Did you figure out what you are going to do w the wiring?
Not yet ... I hope I'm making this to be a lot more complicated than it really is.
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Old 12-27-2008, 02:51 PM   #7
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Hey Thomas, what bike is this headlight for? Relay is real ez hookup. I heard tomorrow is a nice day. Wanna go riding? I also need to give you those Gixxer mirrors. What are u using it for?
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Old 12-27-2008, 04:52 PM   #8
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Actually I'm in Hawaii right now aside from island wide blackouts it's been really nice here. I'll be back on the 3rd if you're around we'll go for a ride.
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Old 12-27-2008, 11:51 PM   #9
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Wow did you really pay 145$ for those lights? Your gonna put them on a bike? If you do end up needing some help just P.M. me and I'll try to break it down so you can understand. Relays are easy its just the way everyone trys to explain can be confusing
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Old 12-28-2008, 12:53 AM   #10
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Wow did you really pay 145$ for those lights? Your gonna put them on a bike? If you do end up needing some help just P.M. me and I'll try to break it down so you can understand. Relays are easy its just the way everyone trys to explain can be confusing
I didn't pay that much ... got them off craigslist somewhere in S.F. for 45 shipped ... used but in good condition.

I know there's a headlight relay already on the SV ... I wonder if I have to replace that one with the one included in the kit ... or can I just plug the lights in directly into the harness with the SV relay still mounted?
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Old 12-28-2008, 11:47 AM   #11
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wire directly in if your bike already have a relay.
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Old 01-06-2009, 09:46 PM   #12
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Quote:
Originally Posted by logan5 View Post
I didn't pay that much ... got them off craigslist somewhere in S.F. for 45 shipped ... used but in good condition.

I know there's a headlight relay already on the SV ... I wonder if I have to replace that one with the one included in the kit ... or can I just plug the lights in directly into the harness with the SV relay still mounted?

Its not just the relay size. I would be more worried about the size of the wires. How many watts were the factory bulbs and how many watts are the ones your trying to use? If they are the same or really close just hook them up to the factory wiring
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