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How to wire AUX lights to only come on with high beam

Discussion in 'Stelvio Chat & Tech' started by elfrider, Jul 1, 2015.

  1. elfrider

    elfrider Just got it firing!

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    Gday,

    I'm finally trying to wire the AUX light to only come on when high beam is on.
    I'd also like to be able to turn them off when high beam is on, i.e. I still want them wired through the AUX light switch on the right handle bar grip.

    However, I'm having trouble trying to figure out the light logic.

    First of all the diagram below is for a MY11 Stelvio, I have a 2012 model, so not sure if the diagram is correct. The #65 relay I have is a five pin relay and has a middle 87a pin with black wire. The 30 pin on the #65 relay I have is BLACK/GREY but the diagram below says GREEN/WHITE. All the other pins are the colors as the diagram below.

    I would of thought that disconnecting the WHITE/GREEN (position 3) wire from the #6 relay, blocking it off and 'piggy backing' the BLACK/WHITE (position 5) from the #65 relay and connecting it to position 3 on the #6 relay would of done the trick. Canuck was very helpful in pointing me in the right direction a few months ago with this.

    However, as it turns out the YELLOW/BLACK (position 5) and WHITE/GREEN (position 3) on the #6 relay is powered (12v reading) when the light switch is off, the lights are also off. I still get a 12v reading across the two wires even with the key out of the ignition. When I start the bike and turn the AUX lights on, the voltage between the two drops to zero, circuit open? (but the lights are on)

    I have tried disconneting the position 3 wire from #6 relay and piggy backing the 87 pin (position 5) from the #65 relay (as well as the 87a and 30 pin) but the AUX light didn't work as I would of expected, they didn't come on at all.

    Has anyone successfully achieved what I'm attempting and get it to work? I'm obviously missing something here.

    Any help would be appreciated.

    Thanks guys.

    The right hand indicator is disconnected at the moment to gain access to the relays but surely that shouldn't affect the circuit for the AUX/HB lights.

    image.jpg
     
  2. canuck1969

    canuck1969 GT Reference GT Contributor

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    OK...will need a little more information.........

    What you are saying is correct...kind of.......

    You said you checked voltage across the pos 3 and 5 wires and got 12vdc. Your meter is correct, however I don't think they both had 12vDC. When you check voltage on a wire you always need to check it in reference to a know ground (0 v dc), like the frame. Did you do this? If not, your observations make sense. The position 3 wire will always have power (in a stock layout, and will have power in your layout when the bike is running and the HB switch is on). When you checked the voltage across 5 and 3 your meter read 12v since it is using the ground on the lights as reference, however, only pos 3 actually had power.

    When you turn the switch on, you now have 12v on both wires and your meter will read zero since it is using on 12v as the reference. You need to check each one with a ground reference to know where the actual voltage is.

    So why didn't the lights work...not sure. The bike has to be running for the HB and aux lights to work since it gets power from the lighting relay that only fires when the bike is running. Also, make sure you took the right power lead from the 5pin HB relay. The drawing only shows a 4 pin but we know this is wrong. You want to take it from pin 87, not 87a. 87a is the low beam circuit that goes through the HB relay. It switches off when you flip the HB switch and switches power to pin 87. Verify it with your multimeter that you have power at the 87 wire when the hb lights are on.

    This is where your multimeter is your friend. In the drawing you have, when the bike is running, and both the HB and aux switch is on, you should have power at 5 and 3 on relay 6 and pin 87 on relay 65. This should work. Just check all the voltages at the wires and make sure you always use ground as a reference.
     
  3. elfrider

    elfrider Just got it firing!

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    Hi Canuck,

    Thanks for the reply,

    I don't know what I was doing yesterday, I must of been tired and confused. Got a good nights sleep, read your post and went out for another look this morning and it works. So I have no idea what I was doing wrong yesterday.

    All I"ve got to do now is solder up a connecting wire and it's done.

    Thanks again for the help, very much appreciated.
     
  4. canuck1969

    canuck1969 GT Reference GT Contributor

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    Not a problem. Been there before where you know it should work but your mind did not see the obvious simple things. Glad it worked for you
     

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