Switched power rear of bike - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 22 Old 01-11-2020, 02:09 PM Thread Starter
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Switched power rear of bike

I want to put an sae plug in my top box to charge doodads and such. But I don't want to run it from the battery, I would prefer it to turn off when I have the key off. Is there any wiring in the rear of the bike I can tap into to do this? thanks!
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post #2 of 22 Old 01-11-2020, 02:20 PM
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rear tail light running light wiring
not the brake light
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post #3 of 22 Old 01-11-2020, 06:18 PM
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Brown wire, usually, provides switched + 12 VDC.

“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
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post #4 of 22 Old 01-11-2020, 10:17 PM Thread Starter
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thanks guys. I have a yellow/black wire, a red wire and a blue wire going into the brake light housing.
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post #5 of 22 Old 01-12-2020, 09:26 AM
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From, "Generation 2 Handy Spec Sheet" on this forum:

https://storage.googleapis.com/wzuku...0Sheet%201.pdf

Any help?
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“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
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post #6 of 22 Old 01-12-2020, 09:39 AM
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Run a hot wire from the battery to a relay. Your power port is then hooked up to the relay. Then run a small wire from the rear tail light or another circuit that is turned on and off by the key. This wire turns the relay on and off. By doing it this way, you are not putting any draw on the bike circuit. The draw is coming from the battery.
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post #7 of 22 Old 01-12-2020, 04:20 PM Thread Starter
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Quote:
Originally Posted by Snowmoer View Post
Run a hot wire from the battery to a relay. Your power port is then hooked up to the relay. Then run a small wire from the rear tail light or another circuit that is turned on and off by the key. This wire turns the relay on and off. By doing it this way, you are not putting any draw on the bike circuit. The draw is coming from the battery.
Thanks man but that's all Greek to me. Can you give me an example of what relay to use?
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post #8 of 22 Old 01-12-2020, 05:41 PM
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Quote:
Originally Posted by JTCrow View Post
Thanks man but that's all Greek to me. Can you give me an example of what relay to use?
A relay isn't hard to understand and is a must for a DIY rider. Start here: https://www.youtube.com/results?sear...+12+volt+relay

“Take the risk of thinking for yourself , much more happiness , truth, beauty, and wisdom will come to you that way.” Hitchens
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post #9 of 22 Old 01-12-2020, 06:17 PM Thread Starter
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Originally Posted by Toney View Post
A relay isn't hard to understand and is a must for a DIY rider. Start here: https://www.youtube.com/results?sear...+12+volt+relay
That makes sense thanks. But I'm still not sure which tail light wire can be used as the on/off circuit and what I can use as a ground. Thanks for the help guys
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post #10 of 22 Old 01-12-2020, 06:50 PM
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Originally Posted by JTCrow View Post
That makes sense thanks. But I'm still not sure which tail light wire can be used as the on/off circuit and what I can use as a ground. Thanks for the help guys
You want to control the relay with the bikes taillight wiring. Anytime the taillight is on, the relay gets a hot to the relay coil and connects the battery positive (through pin 30) to your device hot side (through pin 87). A "simple" relay is just a electrically controlled switch. Therefore a small current can switch a larger one. That "sort of" isolates your new wiring from the bikes factory wiring. NOTE: Use a inline fuse at the battery.


Once you master simple relays, we'll move you on to ESP8266's so you can turn on your bikes lights over the internet while you're in China.

“Take the risk of thinking for yourself , much more happiness , truth, beauty, and wisdom will come to you that way.” Hitchens

Last edited by Toney; 01-12-2020 at 06:54 PM.
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