Well this has turned into a saga...Re; previous posts.
I'm up to I think a fourth new battery-good thing they are the cheapest I can find, maybe that's the problem, but shouldn't think four.
I think the story stopped after the second one- the story so far;
.... I think the guy at the battery shop prepped the first new one to replace the dead flat one.
That one didn't last, he swapped it gratis ..but when I found the field wire shorting I fessed up, but he'd already done a warranty claim so no probs there, but there's something crazy going on because as soon as I add a new battery, it blows a cell or two (6V)...!
The dynamo/generator is charging fine, and I re-checked the regulator, cuts in/out at the right places, and holds a steady regulated ~7.6V, and runs all the lights ok at fast idle upwards, but I noticed today the rear brake light switching sends the amps to '+' insted of '-', maybe 'cos of where it takes off in the circuit...˚~˚
Today I may have discovered something though... as far as I can tell there's no shorts or power leakage, but found a blown fuse in the U-beaut fuse holder from Jaycar, that connects to the battery...
http://www.jaycar.com.au/productView.asp?ID=SZ2043 I was playing with the fuse holder the other week to see what the LED was supposed to do, and it ( LED= blown fuse indicator) only works on 12V, but with a blown or no fuse the disconnected stand alone item has ~1.35* (2kΩ scale) across the fuse terminals (though the LED, I guess), so am wondering if that resistance could be causing a problem, because it's the wire that takes the charge to the battery, and any load out, - but it was fine for 18months...??
I reckon I'll change the fuse holder and see what happens. I bought another smaller 6ah battery to test with, it's a bit cheaper, and they don't have any 13ah ones left anyway...
I hope some of that makes sense to anyone...I'm open to suggestions, but can't expect a lot of glory..
, and I'm otherwise stuck for words!!
~a few hours later *edited
(2kΩ scale from 'kΩ')
@ 09:30 my time 24/02/15 ~23:30 GMT/UTC