sparx 3 phase help

hello, yesterday i fitted my 73 850 (positive ground) with a sparx 3 phase charging system. i have a battery tender plug wired directly to my battery, the newest wires on the bike, so i tied the black and red wire from the regulator into those. i disconnected all the wires from the rectifier, including the ground and also the zenor diode wire. the positive wire from the battery tender plug has a 7.5 fuse, which blew durring install. i replaced it with an 8 amp, fired it up. was charging plenty. my assimulator warning light now stays on (which worked fine) Also the 8 amp fuse blew after awhile. i stuck a 15 amp in and rode back to my shop. the battery was totally recharged in a short ride. is it a mistake to go through the fusable link from the battery tender plug? can i just use a 15 amp fuse? do i need to tie some of the wires from the rectifier together to complete the warning light circuit? obviously i am electrically challenged and any help is appreciated. thanks, jerome

jerome said:

is it a mistake to go through the fusable link from the battery tender plug? can i just use a 15 amp fuse?

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I'm not sure that it's a mistake as such, but obviously the wiring really ought to be securely connected?

The Sparx three-phase alternator kit has a maximum output of 215 Watts @14V, which is just over 15 Amps (215W/14V = 15.3A) I don't know if the Amp output is regulated or not with the Sparx system, so that could be why the lower rated fuses blew?

jerome said:

do i need to tie some of the wires from the rectifier together to complete the warning light circuit?

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I think you have to connect the Green/Yellow wire from the assimilator to (any) one of the stator output (AC) wires?

The Spax alternator box is a regulator and rectifier.