78 troubleshooting...


Information and questions on GL1000 Goldwings (1975-1979)
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yaont2
Posts: 16
Joined: Wed May 18, 2011 12:25 am
Location: Rock Hill, South Carolina
Motorcycle: 1978 GL1000

78 troubleshooting...

Postby yaont2 » Mon Aug 29, 2011 2:14 pm



Hey guys, I have a new problem for you. I was dealing with a misfire on cylinder 1, found the wire and plug boot was corroded. Also removed the coils to check them too. Found everything in working order on the coils, was able to trim the plug wires a little and bought new plug boots to go on them. Everything is back together and bolted down. When I tried to crank the bike it turned over wonderfully and cranked right up, however when I released the starter button it died immediately. I tried a few more times even put a little throttle to it and it revs up but once again, let off the starter button and it quits running. Any thoughts????

Thanks for your help!
Travis



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virgilmobile
Posts: 7659
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: 78 troubleshooting...

Postby virgilmobile » Mon Aug 29, 2011 2:41 pm

Yea..Sounds like you pulled the black wire off the ballast resistor.It's the 12 volt power to the coils.the other wire goes to the start button to give it a boost while cranking.

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thrasherg
Posts: 1837
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Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: 78 troubleshooting...

Postby thrasherg » Mon Aug 29, 2011 2:43 pm

I don't know the electrics on a 78, but I suspect bikes of that age had a Ballast resistor to feed 12 volts to the coil. The ballast resistor is bypassed when the start button is pushed (To allow for the volts drop caused by the starter motor). If your engine runs with the start button pushed but dies after you let it out, I suspect you have a problem with the ballast resistor or the wiring to it and the coil.. Did you accidentally leave a wire disconnected when you checked the coils? Need someone to confirm if a 78 has ballast resistors to the coils.

Gary

yaont2
Posts: 16
Joined: Wed May 18, 2011 12:25 am
Location: Rock Hill, South Carolina
Motorcycle: 1978 GL1000

Re: 78 troubleshooting...

Postby yaont2 » Mon Aug 29, 2011 2:54 pm

Where exactly is the ballast resistor located??? I can see it on the wiring diagrams but where is it physically on the bike?

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virgilmobile
Posts: 7659
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: 78 troubleshooting...

Postby virgilmobile » Mon Aug 29, 2011 3:17 pm

OK..Lets think...It may be in 2 places as I recall.
The ballast resistor is about 3 1/2" long and 1/2" square.It has a lug at each end and is sandy brown color.It is strap mounted to either the coil pack or within a foot of it.Maybe on the left side under the false tank side cover.

yaont2
Posts: 16
Joined: Wed May 18, 2011 12:25 am
Location: Rock Hill, South Carolina
Motorcycle: 1978 GL1000

Re: 78 troubleshooting...

Postby yaont2 » Mon Aug 29, 2011 4:18 pm

Thanks a lot guys, I did find it, on a 78 it's apparantly mounted to the coils. I looked again and found that the lower connector had come loose. After reattatching it and reinstalling the coils, the bike fired up and ran like a dream!

Thanks again!!!!!!

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thrasherg
Posts: 1837
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: 78 troubleshooting...

Postby thrasherg » Mon Aug 29, 2011 5:03 pm

Glad we could help.

Gary




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