carlsmith Posted May 3, 2013 Report Share Posted May 3, 2013 (edited) desperate for help. i have a trial sunday, i've fitted a new fan but i cant find 12 volts to connect it to and there's no existing wiring. i've found the rectifier and the part with a single yellow wire (regulator?). it's an iskra regulator if that helps. if any one can guide me how to connect it i will be eternally grateful. Carl Edited May 10, 2013 by carlsmith Quote Link to comment Share on other sites More sharing options...
nelly1 Posted May 3, 2013 Report Share Posted May 3, 2013 i would get on to beta uk (lampkins ) first thing in the morning im sure they would help they sent me the wiring diagram for my zero Quote Link to comment Share on other sites More sharing options...
0007 Posted May 4, 2013 Report Share Posted May 4, 2013 It will be turned on by the thermal switch which is probably in the rad, but may be on the head My guess is that you run 12v to the fan and the other wire goes to the switch that would ground the circuit when it closes Quote Link to comment Share on other sites More sharing options...
carlsmith Posted May 10, 2013 Author Report Share Posted May 10, 2013 Ok, I thought I had found 12volts but not constant so the fan would only work when the engine was revved up, consequently it overheated after section 12. So I still need to know exactly where to get a feed from. I understand how the circuit works with the thermo switch but just need to know which two wires to get a feed from. It's an iskra rectifier with a brown and a red for the coil, a thicker yellow , 2 for the kill switch and another brown I think. The diagram on here doesn't correspond to my system. Carl Quote Link to comment Share on other sites More sharing options...
0007 Posted May 10, 2013 Report Share Posted May 10, 2013 I will try and look at mine after work tonight, you probably only need one wire to the fan and then to the sender but there would need to be a ground on the sender to complete the circle Quote Link to comment Share on other sites More sharing options...
carlsmith Posted May 10, 2013 Author Report Share Posted May 10, 2013 (edited) Many thanks. Mines a 99 lampkin replica. Hopefully yours has the same ignition rectifier. I see on the wiring diagram a capacitor, mine doesn't have one, can you see if yours does please Waiting in anticipation Carl Edited May 10, 2013 by carlsmith Quote Link to comment Share on other sites More sharing options...
0007 Posted May 11, 2013 Report Share Posted May 11, 2013 Hey, mine is a 96 Two wires to the thermal switch on the head, both wires are green I would assume this switches 12v and not ground The fan has black and black with blue tracer Would assume that black with blue is 12v and black is to ground Quote Link to comment Share on other sites More sharing options...
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