Hello, I have a motorized bicycle that has a magneto on it to run the spark. the magneto has three wires coming out of the engine. it does not have a battery. two of the wires go to the ignition module/coil witch goes to the spark plug. the third wire does not go anywhere but is there to supply an optional 6v incandesant bulb. you do have to ground the bulb to the engine though.
i checked the output and it is 6 to seven volts on the third wire. i tried to hook up a 6v 55w halogen bulb to the wire but it killed to engine. i then bought two 6v 4.5ah batteries and hooked them to the bulb and grounded the whole thing to the bike frame. the bulb lights up bright and pulls 8.5 amps. i also hooked to 6v wire in line with that hoping it would run off of the battery and charge the battery i put two switches in line, one to the posative on the bulb and the other to the ground on the battery so that i could charge the battery when the light was not on. when i switch on either with the engine will not run because i am grounding out the coil.
i am an automotive mechanic and not an electrian but my friend told me i need an isolator to cut the load on the coil. but i dont know what kind or where to put it. any thoughts. is it possible to charge the battery during the day and run the bulb at night? thanks
i checked the output and it is 6 to seven volts on the third wire. i tried to hook up a 6v 55w halogen bulb to the wire but it killed to engine. i then bought two 6v 4.5ah batteries and hooked them to the bulb and grounded the whole thing to the bike frame. the bulb lights up bright and pulls 8.5 amps. i also hooked to 6v wire in line with that hoping it would run off of the battery and charge the battery i put two switches in line, one to the posative on the bulb and the other to the ground on the battery so that i could charge the battery when the light was not on. when i switch on either with the engine will not run because i am grounding out the coil.
i am an automotive mechanic and not an electrian but my friend told me i need an isolator to cut the load on the coil. but i dont know what kind or where to put it. any thoughts. is it possible to charge the battery during the day and run the bulb at night? thanks