no headlight on 76 GL1000


Information and questions on GL1000 Goldwings (1975-1979)
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ntintruder
Posts: 39
Joined: Tue Jun 28, 2011 9:07 pm
Location: Willoughby,OH
Motorcycle: 1976 GL1000
1972 CB750K2
1977 CB750f

no headlight on 76 GL1000

Postby ntintruder » Mon Jul 16, 2012 5:32 pm



I have a 1976 GL1000, The PO had done some creative wiring and I thought I had finally dialed it in but I now find I don't have a headlight and measuring the voltage to the light shows 6 volts. Could this have something to do with the wiring circuit that kills the headlight when the starter button is pressed? Everything else works. The reserve lighting system has been bypassed according to a diagram in the manual.



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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Re: no headlight on 76 GL1000

Postby virgilmobile » Mon Jul 16, 2012 6:49 pm

As I remember 12 volts from the ignition switch is routed to 1/2 of the start button/switch.from there it goes to a rats nest at the triple tree and up to the high low beam switch then it's off to the headlight.you can download the schematic for the color codes. Post again if you get lost.were happy to stick our nose in your wiring problems. :)

ntintruder
Posts: 39
Joined: Tue Jun 28, 2011 9:07 pm
Location: Willoughby,OH
Motorcycle: 1976 GL1000
1972 CB750K2
1977 CB750f

Re: no headlight on 76 GL1000

Postby ntintruder » Tue Jul 17, 2012 9:29 am

I was told that the starter/run/off switch has two black wires and one of them has a resistor in the circuit to reduce voltage to the headlight on starting, and that I might have the connections on these wires reversed.
Where is this resistor? I made a recomended change to the ballast resistor because I am using dyna coils. I did not think that this resistor would have anything to do with circuits controlling the turning off of the headlight during starting. Any information would be most appreciated. Thanks.

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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: no headlight on 76 GL1000

Postby virgilmobile » Tue Jul 17, 2012 9:34 am

The resistor has nothing to do with the headlight.the start button cuts power to it.the resister is to reduce run current to the coils and is bypassed during cranking.I'll pull the schematic as soon as I vet to my computer and post it for you

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WingAdmin
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Re: no headlight on 76 GL1000

Postby WingAdmin » Tue Jul 17, 2012 9:50 am

virgilmobile wrote:The resistor has nothing to do with the headlight.the start button cuts power to it.the resister is to reduce run current to the coils and is bypassed during cranking.I'll pull the schematic as soon as I vet to my computer and post it for you


Right - that's why some bikes with compromised igntion/electrical systems will start when the starter button is pressed, but die as soon as it's released. The increased current to the coils during the start sequence sparks the cylinders up, but when the starter is released, there isn't sufficient spark to keep it going.

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virgilmobile
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Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: no headlight on 76 GL1000

Postby virgilmobile » Tue Jul 17, 2012 11:07 am

here's 2 schematics.The original ignition and the trimmed down wiring for the headlight.

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Fred Camper
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Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: no headlight on 76 GL1000

Postby Fred Camper » Tue Jul 17, 2012 3:55 pm

The starter switch is the most frequent failure. This is why some folks add headlight relays to reduce the current in that start switch.

ntintruder
Posts: 39
Joined: Tue Jun 28, 2011 9:07 pm
Location: Willoughby,OH
Motorcycle: 1976 GL1000
1972 CB750K2
1977 CB750f

Re: no headlight on 76 GL1000

Postby ntintruder » Tue Jul 17, 2012 5:10 pm

I just got the headlight to come on, high beam, low beam etc, went off when I hit the starter then came back when I released the starter button so I thought everything was o.k. but no headlight when I tried it again so I checked the 10 amp fuse and no power to the fuse. All other fuses have power. I seem to be getting only intermittent power to the 10 amp fuse so if all the other fuses show power could the problem be the fuse block itself? If so I might just change it to modern automotive type fuses.

ntintruder
Posts: 39
Joined: Tue Jun 28, 2011 9:07 pm
Location: Willoughby,OH
Motorcycle: 1976 GL1000
1972 CB750K2
1977 CB750f

Re: no headlight on 76 GL1000

Postby ntintruder » Wed Jul 18, 2012 6:59 pm

Finally figured out that the starter switch is malfunctioning. Starter function is fine but the headlight cut-out only works intermittently. It turns the headlight off, just won't let it come back on unless you jiggle the button. Never had that happen before, the starter switch would always just quit completely.




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