Short circuit


Information and questions on GL1200 Goldwings (1984-1987)
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Saintjude33
Posts: 35
Joined: Wed Jun 10, 2015 7:47 pm
Location: Central CT
Motorcycle: 1986 GL1200 Aspencade with sidecar
1989 Yamaha XV250 Virago, Route 66 model

Short circuit

Postby Saintjude33 » Thu Jul 28, 2016 11:47 am



I took my Aspy for a rip yesterday, but the horn and turn signals were inop. Once I got to my first destination I checked the fuses- the 25AMP fuse to the horn/turn signals was smoked. I replaced it, and that blew within minutes. I swapped out the 25 AMP for a 30, and the dogbone cooked on me.

I got the DB swapped out and yanked the horn/turn fuse and rode it home that way. Any thoughts on where to start? I was going to pull the switch module off of the left handlebar and see, but would a bad flasher relay cause the same thing?



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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: Short circuit

Postby twocams » Thu Jul 28, 2016 12:47 pm

Gee a 30 amp fuse, wonder why it blew? :o 25 amp fuse if way to big also im thinkin. My 85 biggest fuse is 15 AMP. Before you burn your whole wire system up I would check that too. I would try to figure out which system is the problem. Un hook the horn see if it blows. Then start pulling bulbs, see if it blows the fuse.

twocams

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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: Short circuit

Postby twocams » Thu Jul 28, 2016 5:54 pm

Just noticed you have a hack. If its hooked up you want to unplug it too. To figure out if it maybe the problem. Process of elimination without constipation/ Or preparation. :lol:


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Rusty Bike
Posts: 265
Joined: Sun Feb 28, 2016 1:55 pm
Location: New castle, PA
Motorcycle: 86 GL1200 SEi, 78 Yamaha XS750SE, 86 Honda XL125, 4.5 HP belt drive Minibike my dad built, foot clutch!

Re: Short circuit

Postby Rusty Bike » Thu Jul 28, 2016 7:22 pm

Agree, those type of circuits would not pull 25A. This is an indication that the problem has appeared before. Consult manual for proper fuse rateing. Installing a larger fuse is an invitation to disaster as TC said. I would be looking for a bare wire somewhere that the wireing harness moves, at the steering head for instance. Pull the bad fuse and rig up a 12 volt lamp across the fuse holder. Lamp will burn bright when the short is present, lamp will dim or go out when short is cleared. With lamp bright, wiggle the wireing harness around to see if you locate the short. Bad flasher relay may cause the short but who knows. Pull it and see.

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julimike54
Posts: 225
Joined: Sun Feb 01, 2015 12:21 pm
Location: Euless, Texas
Motorcycle: 1986 GL1200A original owner
2016 HD FLTRU

Re: Short circuit

Postby julimike54 » Mon Aug 01, 2016 5:38 pm

Dang good idea Rusty, I wished I'd been that smart in the past!


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