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voltage drop - blown 'lights' fuse

  • Thread starter Thread starter crookedspoon
  • Start date Start date
It is standard procedure to take the back cover off of the fuse box and chemically clean out those crimps. Then using flux heat each crimp and flow a small amount of solder to block further corrosion.
 
There're no crimps -> cables are soldered directly to the contacts (see second pic)

IMG_4447.jpg

It is standard procedure to take the back cover off of the fuse box and chemically clean out those crimps. Then using flux heat each crimp and flow a small amount of solder to block further corrosion.
 
There're no crimps -> cables are soldered directly to the contacts (see second pic)

View attachment 50390
It is very common for the GS1000 fur boxes to get hot. The fuses literally will melt together. This is the first time I have actually see the inside of one, but most of the SSPB I sold were to GS1000 owners.

That fuse box looks filthy; it could be worse but there is little suprise if it would have high resistance between those plates secured with the pressed rivets. You need to chemically strip the oxidation between the plates, and shoot it with some contact cleaner(no WD40!), then try and flow some solder into the seam (using flux) between the clip and the bar that the wire is soldered to.

Simply follow the physical flow of where the current has to go to get through the fuse box. If there is anything that is press fit, it has probably corroded over the years and that is the problem.
 
replaced the fusebox with an aftermarket one (flat fuses).
Voltage loss went from 2V (battery to light fuse dead side) to 1V.
Definitely better, still some searching to do.

thanks for all the feedback so far!

How much of a voltage drop could be considered 'normal'?

side question: what's the recommended way to join 4 wires together? wire nut with tape to keep it in place?
 
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side question: what's the recommended way to join 4 wires together? wire nut with tape to keep it in place?
"Recommended"? the answer is no wirenuts. Crimps only. Some like to work some solder in too. i don't. It's another metal added= corrosion. Plus it needs doing at the proper heat without corrosive flux (rosin core only) on clean clean wire. But you decide. I am leery because it fails around salt.
IMO, If you look at what Suzuki did, and duplicate it, you can't be far wrong.
But there are funkier ways that can last a long time. Wire nuts would be way down that list.
Add_It's not that I have never used "wirenuts" but in the end, if for no other reason, consider the ugliness of trying to seal them such that they don't come apart or corrode...it gets to be pretty ugly and they don't tuck away very well.

How much of a voltage drop could be considered 'normal'?
If you change that to "SHOULD be considered normal it'd be "none to 0.5 volts." but that's ideal. "could be considered normal" is whatever you can't fix but doesn't seem to hurt anything long term. If you consider the wiring diagram you will see that some electrical paths are longer and go through more switches and contacts than others and these, with higher currents flowing through, will have more vd. (Ignition,head light)
 
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