83 vf electrical issues?

Discussion in '1st & 2nd Generation 1983-1989' started by rebuiltrider, Jun 13, 2018.

  1. rebuiltrider

    rebuiltrider New Member

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    A few weeks ago I picked up a $100 83 interceptor listed on craigslist as a non running complete "parts bike". a day of working on it and I had it up and running and the bent fork tubes replaced. rides and runs great but the electrical issues are abundant. High beam doesn't work even though its putting power out for it(checked and replaced bulb still same issue). I have a brown hot wire just hanging under the cluster and no running tail light with the dash light for it on. Also the rear brake doesn't activate the brake light, there doesn't seem to be anything on the rear brake switch electrical related. Is the taillight activated by the rear brake? I have the wire diagram, I haven't been able to place this brown hot wire though. All my fuses are new and good same for tail bulb, still cant figure it out.

    Any help is greatly appreciated, waiting for the new title as I'm trying to get this all sorted out this riding season.
    IMG_20180506_133623.jpg IMG_20180506_173206.jpg 35162263_2024469417880552_6112570448912842752_o.jpg
     
  2. squirrelman

    squirrelman Member

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    headlight problem is most likely within the START pushbutton contacts as power goes through there.

    have you removed valve covers and inspected cams yet ??

    brown wire is for taillights.
     
  3. rebuiltrider

    rebuiltrider New Member

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    I'll check the contacts today as just started tearing apart everything in the rear. Havent checked the cams but there isnt any noise out of the ordinary and the engine sounds and runs good. as for the brown hot wire I know it goes to taillights off the wire diagram. the diagram does show a brown wire towards the front of the bike going to nothing, is that correct? if its not what does that wire attach to? ive got other wires up front that arent connected to anything as well which makes me think im missing part of a harness
     
  4. Captain 80s

    Captain 80s Member

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    The VFs have an extra brown and green in the front of the harness. Very handy for installing switched accessories, like USB chargers. Was really disappointed when I found they deleted that on the 86 VFRs.
     
  5. rebuiltrider

    rebuiltrider New Member

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    so thats just a extra hot wire that should be capped off? what about a rear brake switch? is there one? took apart the whole right side foot controls today and found nothing even remotely related to a switch or relay for it.
     
  6. Captain 80s

    Captain 80s Member

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    It usually has a clear protector over the female connector to prevent contact with anything.

    Yes, they have (had) a rear brake switch. There will be a lead around the top of the battery where it plugs in. I think it is bundled with the lead from the Fuel Sending Unit out of the tank.
     
  7. rebuiltrider

    rebuiltrider New Member

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    so after chasing wires finding frayed or damaged ones and replacing them i have nothing. bike has power barely turns over no headlight taillight or blinkers. battery also gets extremely hot at the connections trying to turn it over. would that be a bad CDI? battery seems like its dead when trying to start but if I check it its at the full voltage and works in other bikes i have.
     
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