just got hands on a 79xs650 special know nothing about it really but it ran when parked last year. i bought brand new sealed battery hooked it up and nothing. looked around for a little and noticed maine fuse was blown. replaced it and as soon as i put it in it blows again . Any ideas i really wanna hear my first bike run !
-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
main fuse blows instanly without key in
- Thread starter newby79
- Start date
-
- Tags
- electrical
MN_Bobber
79 XS650 Newb
You've got a short to ground somewhere. Unless you have an meter, it's going to be difficult finding the problem (unless you can clearly see a bare wire contacting metail). I just went through this and needed a buddys help that had a meter to resolve. Mine turned out to be a bad bridge rectifier on my radio shack rectifier.
Good luck!
Sean
Good luck!
Sean
Trouble shooting electrical is just a slow step by step process. You first need a wiring diagram................manuals are good................the "Tech" section here has wiring diagrams. A VOM is a basic tool for these bikes.
With the key turned off, the main fuse only goes to 2 places, the rectifier and the ignition switch. Try unplugging the rectifier that lives under the battery. Otherwise look around the ignition switch.
With the key turned off, the main fuse only goes to 2 places, the rectifier and the ignition switch. Try unplugging the rectifier that lives under the battery. Otherwise look around the ignition switch.
jayel
#9 Guru 74 TX650A
no the plug for the rectifier is under the battery box, 1 red wire 3 whites and a black
The connector on the left side is the regulator; the rectifier connector is on the right side.
If thats the original rectifier, its old and worn out............time to replace even if its still working.
http://xs650temp.proboards.com/index.cgi?board=Charging&action=display&thread=3473
If thats the original rectifier, its old and worn out............time to replace even if its still working.
http://xs650temp.proboards.com/index.cgi?board=Charging&action=display&thread=3473
wurkenman
XS650 Enthusiast
Might be a dumb question, but is the battery hooked up right. Check to make sure the terminals are the same as the old batt.
Here is a little trick to use when trying to find shorts.
Solder a couple of wires, with clips on the ends, to a single filament turn signal bulb.
Clip this in place of the fuse.
It will light up bright when the short is there and dim down when you correct the short.
Saves all those fuses and gives you time to hunt.
Solder a couple of wires, with clips on the ends, to a single filament turn signal bulb.
Clip this in place of the fuse.
It will light up bright when the short is there and dim down when you correct the short.
Saves all those fuses and gives you time to hunt.
Yes, you need a new rectifier. Don't order one.................build your own and save money. The link is in post #9 above.
Really lol i am gonna try to make my own i guess haha if i cant guess then i"ll spend the money thank you all for your help. also the previous owner is now telling me he was having charging trouble could this to be the rectifier?
Yamakazi
XS650 Addict
Go to Harbor Freight and buy one of their cheap multimeters (a few dollars). Research this site for info on "zeroing" it out, etc. Lots of info here...just gotta look. Sounds like you should do a thorough testing of your entire charging system.
Also, if you go the combo rectifier/regulator route (from Mike's XS, for example), pay close attention to the wiring diagram you get with the part. Your 79 is a little different from most earlier and later year XS's.
Building your own rectifier is a whole lot cheaper than Mike's rec/reg combo.
Also, if you go the combo rectifier/regulator route (from Mike's XS, for example), pay close attention to the wiring diagram you get with the part. Your 79 is a little different from most earlier and later year XS's.
Building your own rectifier is a whole lot cheaper than Mike's rec/reg combo.
Similar threads
