Wiring Auxiliary Lights - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 21 Old 12-31-2017, 07:54 PM Thread Starter
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Wiring Auxiliary Lights

I've been looking at how-tos on wiring in auxiliary lights and keep seeing differing instructions, specifically with respect to relays. Are relays only needed if you want to disable the high beams, or is there another purpose?

I have a fuse block installed that is switched via relay off the heated grip connector. Could I just wire the auxiliary lights to that and have them work? (see diagram) I don't care about disabling high beams, I just want to be able to turn the lights on as needed.
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post #2 of 21 Old 12-31-2017, 08:26 PM
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Aux Lights

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Originally Posted by scotty707 View Post
I've been looking at how-tos on wiring in auxiliary lights and keep seeing differing instructions, specifically with respect to relays. Are relays only needed if you want to disable the high beams, or is there another purpose?

I have a fuse block installed that is switched via relay off the heated grip connector. Could I just wire the auxiliary lights to that and have them work? (see diagram) I don't care about disabling high beams, I just want to be able to turn the lights on as needed.
You could run the lights that way but it is not the correct or safe way to do it...Relays are there to carry full current from the battery and the switch is low current "Control" voltage to fire the relay contacts. It is good that your fuse block is fused, but the individual light circuit( or anything else) should be fused as well.

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post #3 of 21 Old 12-31-2017, 08:26 PM
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The idea of a relay is to isolate the switch circuit from the light circuit. It has charged a little now with low amp LEDs. Sometime you can run them without a relay because they draw so few amps.. The relay allows the switch to only have `200ma going through it, and not the multiple amps that lights draw.

In your drawing I would replace your on/off switch with a relay. Connecent the #30 to the fuse block , #87 to the light, and #85 to a ground. Connect a wire from the same +12v to a switch then to #86.

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post #4 of 21 Old 12-31-2017, 09:17 PM Thread Starter
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The idea of a relay is to isolate the switch circuit from the light circuit. It has charged a little now with low amp LEDs. Sometime you can run them without a relay because they draw so few amps.. The relay allows the switch to only have `200ma going through it, and not the multiple amps that lights draw.

In your drawing I would replace your on/off switch with a relay. Connecent the #30 to the fuse block , #87 to the light, and #85 to a ground. Connect a wire from the same +12v to a switch then to #86.
I think I get what you're saying. But where do I run the switch on 86?

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post #5 of 21 Old 12-31-2017, 09:20 PM
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Originally Posted by scotty707 View Post
I think I get what you're saying. But where do I run the switch on 86?
Run a small wire from the fuse box to the switch than to the #86. That will energize the relay when the switch is closed.

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post #6 of 21 Old 12-31-2017, 09:29 PM Thread Starter
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I see now ... Just had to look at a relay to see what you meant. Thanks.

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post #7 of 21 Old 12-31-2017, 09:33 PM Thread Starter
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So can 30 and 86 be attached to the same terminal (12V + source) on the fuse block?

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-Ted Simon
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post #8 of 21 Old 12-31-2017, 09:55 PM
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Yes...nothing is going to happen until #30 sees +12v switched on(closed switch contact)

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post #9 of 21 Old 01-01-2018, 11:54 AM
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I used a wiring harness and wired it to a fuse box running directly from the battery.
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post #10 of 21 Old 01-01-2018, 01:45 PM
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Here are a couple of thread that might be useful.

A ready made wiring harness for the V-Strom three wires to the bike. Red wire to battery positive, black wire ti Battery negative, and white wire to any switched source.

Suzuki Auxiliary LED Lighting - AdventureTech, LLC.

And these two threads for doing it yourself.

Driving Light Wiring with Auto Hi-Beam ON - 101

V-Strom wiring 101
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