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Rodney, You just got too many things goin on lol so lets get back to the basics. First of all if you have a correctrly wired and working light switch field current control system going on, the lights switch MUST HAVE A GOOD GROUND or it wont ever charge. The gennys field post must have a good wire to the switch and then it dead grounds the field for high charge but via a small switch mounted resistor for low charge. HOWEVER if you simply dead ground the gennys field if the genny is good???? it will still charge (even that 8 volt battery) and then ifffff ff the cutout relay is good???? it will latch closed so the gennys output is then connected to and can charge the battery. Buttttt t at shutdown the relay MUST open so the battery dont reverse discharge via the genny. TRY THIS Dead ground the gennys field n see if the cutout relay (it must have a good ground) pulls in and she charges then??? If not, leave the field dead grounded n jump by pass around the relay by temporarily jump connecting its BAT and GEN together n see if she charges then?? Once the field is dead grounded and the relay is by passed around if still no charge the genny is bad assuming the battery is okay n all else is wired correct. Sooooo if you had a new switch (not expensive or hard to wire) and a working n grounded cutout relay, that would solve your charging problem ifffff the genny is good (and it should still charge an 8 volt battery although NOT at any super high charge rate, butttt depends on the genny and battery conditions) !!!! Next, you obviously need a working Cutout Relay. It also must have a good case ground (usually to the gennys case) and the way it latches in is cuz it has a higher resistance small wire shunt winding and when the gennys voltage rises the relay closes afterwhich its other bigger wire series winding holds it closed..... YOU NEXT GOTTA DECIDE HOW YOURE GONNA PROCEED If the genny is good and the cutout relay is also good, it can still charge an 8 volt battery with no other mods. Also you need to either dead ground the gennys field (always high charge) or Id get a new correct light switch is best. ALSO if its an adjustable 3 brush genny Id set it to max charge if youre gonna use an 8 volt battery. NEXT its possible to convert to a full fledged Voltage Regulator (it also must be grounded and Id set a 3 brush genny to max charge) buttttt ttt if you wanna charge an 8 volt battery, the VR may or may not need adjusting. If it ONLY has a current control relay it may still work buttttt tttt if it has its own Voltage Control relay (a 3 coil VR) orrrrr r a combination Voltage/Current (a 2 coil VR) it needs adjusting. BOTTOM LINE RECOMMENDATIONS Id trash that odd ball weird troublesome 8 volt system !!!!! !!! Id buy a correct light switch (not expensive or hard to wire),,,,, ,buy a good working 6 volt cutout relay,,,,, ,,,,,but a good heavy duty highest rated 6 volt batetry you can get that still fits in the battery space,,,,, ,,,use 00 gauge Battery n Starter n Ground cables,,,,, ,,,hook er up n polarize the genny and assuming the genny is okay youre good to go and it will be original n correct n not jury rigged If you insist on a voltage conversion go ahead n make it the standard 12 volts NOT AN ODDBALL 8 VOLT Again it possible to convert to a full fledged VR, 6 or 12 volts, no combination charge n light switch needed, set the third brush (if it has that) to max charge. Nuff said, its your move John T
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