Headlight.... - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 15 (permalink) Old 11-15-2016, 08:29 PM Thread Starter
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Headlight....

so I ran into another problem arghhh. Only one side of my headlights work. I have aftermarket lights fyi. fuses are good or the only fuse for it is. I checked with a volt meter thing and I'm not getting any power. what do I check next? I'm lost
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post #2 of 15 (permalink) Old 11-16-2016, 04:44 AM
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Try turning your high beam on?
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post #3 of 15 (permalink) Old 11-16-2016, 06:41 AM Thread Starter
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Try turning your high beam on?
nothing also. no power
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post #4 of 15 (permalink) Old 11-16-2016, 07:40 AM
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Of course check your plugged connections, is your switch bad? Open it up and look for corrosion or obvious damage.

With the wiring problems you've had with that bike sounds like you may just have a F'd up harness man. If you're not concerned with high/lo beam you just want both on at the same time I guess you could just run a jumper wire over from the side that is getting power to the side that's not but that a half assed job lol.

If it were mine, and you haven't fixed the blinker issue you were having I'd go ahead and pull the harness out and have a good look over it for cuts slices and hacks and either repair or replace it. I had a brake light issue I just coulnd't find were the problem was I spent hours and hours trying to find it. Spent 40 bucks on a uncut Ebay harness and Viola fixed! Wish I could be more help I'm not that great with electrical stuff.

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post #5 of 15 (permalink) Old 11-16-2016, 07:50 AM Thread Starter
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blinker problem has been fixed . it was just missing a relay. got one from cycle gear and plugged it in and boom. I don't think its the switch as the second headlight outlet doesn't have power. I checked using a volt meter. I would like a high beam and also just in case its needed for inspection when I get this bike inspected
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post #6 of 15 (permalink) Old 11-16-2016, 08:08 AM
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Cool, if the switch isn't functioning it wouldn't put power to the hi beam...

The RC's only use one light on lo beam.
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post #7 of 15 (permalink) Old 11-16-2016, 09:30 AM
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you may also be missing the high beam relay. given you were missing the signal relay
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post #8 of 15 (permalink) Old 11-16-2016, 09:57 AM
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you may also be missing the high beam relay. given you were missing the signal relay
That's the first thing that popped into my mind too: the high beam relay.

Sanee, the high beam relay should be located tucked inside the front and inner panels near the top and the turn signal. So just under your left clip-on. There should be a socket that you plug the relay into, and it's the same type of relay that the fuel-pump, bank angle uses, (and on SP2, the fan control). So you can swap in one of these (known good) relays to see if that will power your high-beam.
Hopefully that relay socket wasn't cut out of your harness...

John, 2000 RC51 #000100

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post #9 of 15 (permalink) Old 11-16-2016, 03:48 PM Thread Starter
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That's the first thing that popped into my mind too: the high beam relay.

Sanee, the high beam relay should be located tucked inside the front and inner panels near the top and the turn signal. So just under your left clip-on. There should be a socket that you plug the relay into, and it's the same type of relay that the fuel-pump, bank angle uses, (and on SP2, the fan control). So you can swap in one of these (known good) relays to see if that will power your high-beam.
Hopefully that relay socket wasn't cut out of your harness...
hah damn. just went to take a look and any chance is it a 4 prong socket? theres an empty slot like you mentioned under the left clip on together where I would plug in the headlights. if so can I get this relay from cycle gear also or wheres the best place?
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post #10 of 15 (permalink) Old 11-16-2016, 06:37 PM
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Yes, that has to be it.
I couldn't find relays anywhere besides a Honda dealer. They're about $45 each as I recall. I would recommend buying at least one extra if budget allows since the same type is used in 4 places on the bike. Nice to have a spare as they do fail on occasion. My fuel pump relay and bank angle relay gave up within a couple weeks of each other.

John, 2000 RC51 #000100

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