Headlight Amps? - Kawasaki Versys Forum
 
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post #1 of 6 (permalink) Old 03-22-2012, 07:49 AM Thread Starter
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Headlight Amps?

Does anyone know how many amps the stock Headlamp draws? Hi-beam and low bean separate and combined?

I had the 10amp fuse blow last night and I can't figure out why...I have two 24W LED lights drawn off the same circuit but I been running it that way for years without an issue......I was wondering if I was pushing close to 10 amps with the LEDS and the HI and low beam on...

" I don't care about shinny chrome or loud exhaust, I don't ride to be seen, I ride because I want to disappear"

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post #2 of 6 (permalink) Old 03-22-2012, 08:01 AM
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Originally Posted by offcamber View Post
...I have two 24W LED lights drawn off the same circuit...
Hi, I don't have a response to your question, but, for safety's sake, add an automotive relay and have the LEDs powered from the battery and able to work independently of the headlight. I have mine wired up to come on with a separate handlebar switch or with my highbeams (diagram on my website).

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post #3 of 6 (permalink) Old 03-22-2012, 08:35 AM Thread Starter
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Quote:
Originally Posted by hdatontodo View Post
Hi, I don't have a response to your question, but, for safety's sake, add an automotive relay and have the LEDs powered from the battery and able to work independently of the headlight. I have mine wired up to come on with a separate handlebar switch or with my highbeams (diagram on my website).
That's what the inline fuses are for.....4Amps should not require a relay.

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post #4 of 6 (permalink) Old 03-22-2012, 02:04 PM
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The h7 is 55w, so at ~14v you should be somewhere near 4amps. At 12.4v, you'd be closer to 4.4amps.

I don't think load would be your problem in this case unless you're running both h7 bulbs together.
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post #5 of 6 (permalink) Old 03-22-2012, 04:43 PM
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Originally Posted by Psalm11_6 View Post
The h7 is 55w, so at ~14v you should be somewhere near 4amps. At 12.4v, you'd be closer to 4.4amps.

I don't think load would be your problem in this case unless you're running both h7 bulbs together.
Most H7 bulbs are about 55watts but it varies from brand to brand slightly. With the engine running you should get slightly more than 14v from your bikes electrical system.

Low beam = 55w / 14v = 3.9 amps

High beam = 3.9 amps

POWER (in watts) = VOLTAGE (in volts) * CURRENT (in amps)

VOLTAGE (voltage drop across a resistance) = CURRENT * RESISTANCE (in ohms)


I've replaced my low beam bulb with a XEXON kit (xexon bulb and transformer/power supply) for $30. It is slightly brighter and uses about 30w vs 55w for an incandescent bulb. Unfortunately because they take 30 seconds or so to reach full brightness after being turned on, they do not work well in the high beam application.

Last edited by Sprocket; 03-22-2012 at 04:47 PM.
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post #6 of 6 (permalink) Old 03-23-2012, 07:29 AM Thread Starter
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Thanks guys that helps...I think I have it figure out.

" I don't care about shinny chrome or loud exhaust, I don't ride to be seen, I ride because I want to disappear"

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