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New regulator blows fuse instantly

  • Thread starter Thread starter andyman54
  • Start date Start date
A

andyman54

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Hey all I have been having charging problems that i have been trying to fix i get about 12.5 when its at about 4k or so rpms. So i said what the heck lets replace the stator and regulator. I havent replaced the stator yet but i bought a cheapy regulator for 20 bucks from ebay and decided it was worth the risk. My old regulator wasnt bolted to the frame and was sitting under the seat so i suspected it was dead due to heat and not a good ground spot( previous owner). So today I plugged in my new regulator and now everytime i finish plugging it in the 15amp main fuse blows, If i plug in the old regulator no fuse pops. Am i doing something wrong or did I just get a bad regulator?

Thanks
Andy
 
Last edited:
How many wires on this cheapy r/r? If 5, then the red wire goes into harness near fuse box (just like old unit) and another wire grounds the r/r to battery/frame. Seems your cheapy is shorting out.

Hopefully you have read the endless posts on series vs. shunt r/r's . If you must have a shunt unit ,get a genuine Shindengen off a 35 year old honda like a SH-232 : typically about $20 used.Avoid ebay chinese knockoffs .

test your current stator- you might not need a new one. Put the saved money towards a series SH-775 r/r.
 
tom203 said:
How many wires on this cheapy r/r? If 5, then the red wire goes into harness near fuse box (just like old unit) and another wire grounds the r/r to battery/frame. Seems your cheapy is shorting out.

Hopefully you have read the endless posts on series vs. shunt r/r's . If you must have a shunt unit ,get a genuine Shindengen off a 35 year old honda like a SH-232 : typically about $20 used.Avoid ebay chinese knockoffs .

test your current stator- you might not need a new one. Put the saved money towards a series SH-775 r/r.
Click to expand...

Its a 5 wire reg. I hope to call up a few bike junk yards near me and see if they have anything. Can I use any late model honda regulator or does it have to be the sh232. For example if I find one that has 6 wires instead of 5 thats still useable right?
Thanks
Andy
 
I believe the sense wire plugs into a circuit in the wiring harness and tells the regulator/rectifier how much voltage is on that circuit and the reg/rec adjusts the voltage accordingly so that a positive potential exists and the battery charges. Most are set to minimum 12VDC and maximum 14.5VDC. When the voltage on a circuit goes higher, the reg/rec adjusts so that the battery will charge at the proper voltage. The sense wire isn't connected to the battery; typically a red wire is.
 
Okay just wanted to send you guys an update. I took off the side cover. And i found the the stator wires were all burnt up and I definetly needed another one. I replaced that and now my battery is charging. The regulator ended up working still which was good news.

Thanks for all the help

Andy
 
Okay just wanted to send you guys an update. I took off the side cover. And i found the the stator wires were all burnt up and I definetly needed another one. I replaced that and now my battery is charging. The regulator ended up working still which was good news.

Thanks for all the help

Andy
 
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