Blowing fuse

[tomo]

Been having a few issues with the fuse on my 79 GS750. A couple of months back I went out for a run, bike ran fine. Stopped for gas, when I came to start her up all electrics cut out, no ignition light, Checked the fuse and it had blown, but fortunately had a few assorted fuses in with the toolkit. Put in a 20amp fuse, bike started ok so finished the ride ok, Been out a few more times since with no issues until yesterday. Bike started ok, turned on the lights but when I flicked on the left indicator everything cut out again. Checked the fuse and seemed ok, so cleaned up the holder and this seemed to do the trick, bike started up and ran ok. This morning though, again started ok but after a few miles had to use the indicator and again everything cut out. This time fuse had blown, so replaced and she fired up ok. But headed home and am reluctant to take her out again. According to my manual, the fuse should be a 15amp, the one that blew was a 20amp. Electricery is not my strong point. Any of the electrical wizards out there able to advise ?.

[Brendan W]

Was it the left indicator both times?
Breaking my own rule here but have a look at the main harness bundle at the steering stem. Over time wires rub here and develop breaks that short the supply to ground.