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Post by Wyn on Jul 15, 2013 11:04:44 GMT -5
I have a question for all the techy geeks out there. Hay Skip20 maybe you can answer this one. My son has a couple of motor cycles (Suzuki GS 850 and a Hyabusa) and he bought a GiVi V47NT Tech Monokey top case with mounting adapter to mount on both the GS 850 and the Hyabusa. He mounted the case on his Hyabuse everything works OK. Brake light work like they should. He mounted the case on his GS 850 and it looked like everything is OK. But then he notice the GS 850 had running lights and brake lights. In the wiring there is only two wires, one ground and one brake line. So the question is where did the running lights come from on the GS 850  Remember there are only two wires one ground and one brake wire, This case only come with just brake lights. So again where did the running lights come from ?  Wyn  |
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Post by cocacoladodge on Jul 15, 2013 11:31:37 GMT -5
My dad had bags and trunk that did the same thing on one of his old Yamaha xs1100s found that there was a metal support inside the fiberglass that the lights were grounded to and it ran around the hole thing including the mounting location. so the lights were already grounded. That is the only thing that comes to mind is that it IS self grounding, and the two wires are for running lights and brake light/turn signals
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Post by cocacoladodge on Jul 15, 2013 13:46:37 GMT -5
- Just a side note, the metal band /support inside was covered over by the fiberglass so you don't know its there unless you drill into it...
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Post by Wyn on Jul 15, 2013 13:58:09 GMT -5
The box is a compositive material can't short out. No metal bans no holes drilled uses a composive mounting base, only two connections. Only two wires Gnd and Brake, No turn signals, no running lights. BTW his Busa now has running light the same way! Wyn  |
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Eric A
Full Member
It's an obsession not an investment!
Posts: 223
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Post by Eric A on Jul 15, 2013 17:20:29 GMT -5
On my dads R1100 it used a computer controlled brake/tail light. It was an led bulb in the bike and depending how much voltage went to it from the computer made it either brake or tail and the Givi bag had the ability to do the same thing. That said however it really screws with the ABS and required an isolator that returned the case light to brake only. Not sure if that is helpful or not. Btw it took forever to figure out why sometimes the abs would not calibrate! We finally figured out it was only when the bag was on the bike. You are correct though that it cannot short out if it uses the same quarter sized contact made out of plastic with the two connectors in it. Because it is direct wired with no ground possible between the light in the bag and the bikes elect system unless you hooked both the +&- to the + brake and + taillight wires and it is back feeding a ground when one or the other has 12v applied.
Eric
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Post by Wyn on Jul 15, 2013 17:48:28 GMT -5
The Suzuki GS 850 is old enought that it does not have a Lighting computer, so what applies power the the brake lights that makes it look like it has running lights.
To protect the computer in the busa a blocking diode was added in the brake wire. So what lights up the brake lights as if they were running lights.
Wyn
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Post by Wyn on Jul 15, 2013 20:49:23 GMT -5
Eric you are right but it is not the computer. My son had replaced the tail light with a new LED Brake and running light in place of the old Glass Bulbs in his MC. Since the two resistors are not at gnd potential so there is about 9V applied to the Brake circuit. So the Brake light get the 9V and since it is a lower voltage the brake light light up a little dimmer. And when the brakes are applied they get the full voltage and glow as the brake lights. It looks just like running lights and brake lights all in ones. Keep this in mind when you install the new LED HD light in your brad and somthing is a little flakey. Wyn  |
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Eric A
Full Member
It's an obsession not an investment!
Posts: 223
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Post by Eric A on Jul 16, 2013 10:02:23 GMT -5
I am glad you figured it out! I like LEDs but they can be a problem when not in a led designed application.
Eric
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