Headlight socket has voltage, but no light


Information and questions on GL1000 Goldwings (1975-1979)
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sevesteen
Posts: 4
Joined: Sat Aug 17, 2013 7:18 pm
Location: Piqua, Ohio
Motorcycle: 1978 Honda GL1000
1982 Yamaha XJ750 Seca
1976 Honda CL360 (CL180 until I get it fixed)
1978 Kawasaki KZ750 Twin
1982 Honda C70 Passport (Wife's)
1987 Suzuki LS 650 Savage (Wife's)

Headlight socket has voltage, but no light

Postby sevesteen » Sat Aug 17, 2013 7:58 pm



Just bought a beautiful 78 GL1000 with a Vetter fairing and Bates bags, under 20,000 miles. PO told me that the low beams did not work, he didn't ride at night so just left high beams on.

I did some troubleshooting today. Low and high beam works on the bulb removed from the bike, with alligator clips to a battery. With a voltmeter at the socket and no bulb, everything looks normal--Low beam side shows just under 12 volts (engine off) when the switch is on low, goes off when I switch to the high beams--then high beam connection has the same voltage. Plugged in to a headlight, there's never voltage at the low beam terminal and the low beam won't light. Tried a different bulb, still no low beam. I plugged a bulb terminal into just the low beam part of the socket and had voltage to ground. Most testing was done engine off, but engine on doesn't turn the low beam.

Help?



User avatar
flash2002
Posts: 178
Joined: Mon Aug 30, 2010 6:38 pm
Location: Montreal, Canada
Motorcycle: gold wing 1800
2003

Re: Headlight socket has voltage, but no light

Postby flash2002 » Sun Aug 18, 2013 2:26 pm

If the high beam works and no low beam, it must be the high/low switch. Take it apart and clean and greese.

User avatar
sevesteen
Posts: 4
Joined: Sat Aug 17, 2013 7:18 pm
Location: Piqua, Ohio
Motorcycle: 1978 Honda GL1000
1982 Yamaha XJ750 Seca
1976 Honda CL360 (CL180 until I get it fixed)
1978 Kawasaki KZ750 Twin
1982 Honda C70 Passport (Wife's)
1987 Suzuki LS 650 Savage (Wife's)

Re: Headlight socket has voltage, but no light

Postby sevesteen » Sun Aug 18, 2013 5:18 pm

Problem turned out to be the wiring between the fairing and bike. Started using an old turn signal as a test light--it would duplicate the symptoms, working in the high beam connections, not working on low beam. I was able to plug the turn signal into the original fork-mounted headlight socket and that would light the bulb as it should on either low or high beam. Fairing wiring was done with crimp splices, I disconnected the low beam headlight wire and soldered it to the bike wiring. Low beam now works as it should.

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portugeezer
Posts: 424
Joined: Sun Feb 13, 2011 3:44 pm
Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Re: Headlight socket has voltage, but no light

Postby portugeezer » Tue Aug 20, 2013 3:29 pm

I met an older gent at a swap meet who owned a Honda dealership back in the 70's. He told me that Honda let them know the Gw's were coming out and that fairings would be available from Vetter with brackets etc. So he ordered a couple bikes and some fairings from Vetter. He said he had fairings for weeks before he saw the first bike! Anyway most of them were never even ridden naked this stuff was added at the dealer. They all used crimp splices. I had to replace them all with solder and shrink tubing. You should probably do the same! I had a 1983 Aspencade. I have to say the Vetter stuff is much better made than the flimsy Hondaline fairings and luggage! Better to splice a few wires and have the better stuff!

User avatar
portugeezer
Posts: 424
Joined: Sun Feb 13, 2011 3:44 pm
Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Re: Headlight socket has voltage, but no light

Postby portugeezer » Tue Aug 20, 2013 3:32 pm

BTW I had the entire headlight going out intermittently and it was always dim. My bike was a wiring nightmare!




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