Brake lights wiring - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 8 Old 08-24-2019, 08:09 PM Thread Starter
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Brake lights wiring

While looking to install "Back off" I find a plug for the flashers and license plate light but apparently no plug for the brake lights. Is it hidden somewhere or does it simply go straight to the lights? Out of the 3 wires which one is which? I cannot find a wiring diagram...

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post #2 of 8 Old 08-24-2019, 09:28 PM
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There is an oval plug under your seat about 4 inches from the tail light that gives you access to the brake light and tail light. I can't remember the colors. I just used a volt meter to find the brake by grounding one side of the meter and finding the wire that went to about 12v when the rear brake was applied.
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post #3 of 8 Old 08-26-2019, 11:12 AM Thread Starter
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Nope, the oval plug is some sort of a sensor, temperature or something else. There is a plug deeper, right at the taillight assembly. On the pipe side it has a tab that needs to be pressed to unplug it. Good luck with fitting there enough fingers to do that and pull the plug at the same time (never pull the cables!). Flat screwdriver makes the trick. Cables: Black with white strip - ground, brown - running lights, white with black strip - brakes.

The oval white thing is weird, it was giving me only 9.5V on the multi-meter, not sure why would there be any accessories/sensors running on lower voltage...

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post #4 of 8 Old 08-27-2019, 08:30 AM
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Yes, that's the plug I used to connect extra brake light on my topbox.

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post #5 of 8 Old 08-27-2019, 10:02 AM Thread Starter
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OK, I wasn't getting any reading on the multimeter on the leads there... I guess it can be done in more than one way.

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post #6 of 8 Old 08-27-2019, 02:15 PM
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Was your ignition on? Check if you have a good ground to frame or connect directly to the battery neg.
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post #7 of 8 Old 08-27-2019, 02:47 PM Thread Starter
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Quote:
Originally Posted by steve85248 View Post
Was your ignition on? Check if you have a good ground to frame or connect directly to the battery neg.
It was on and I know how to use multimeter. I had correct readings on the main cables. I ended up putting blade connectors which is no biggie, I'm just surprised to have that much of a voltage difference if that plug is actually meant to be used for aux brake lights. To drop it to 9V there would have to be a huge resistance somewhere in between.

Anyhow, these wouldn't work for the modulator regardless since I would still have to reroute the exit of the positive to the taillight assembly.

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Last edited by offwegoagain; 08-27-2019 at 02:52 PM.
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post #8 of 8 Old 08-28-2019, 01:52 PM
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All I did was put a $3 LED flasher on the brake light. After I pulled the oval connector from the light housing I was able to pull it out far enough to cut and splice it inline. Used solder and shrink wrap as I always do.
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