Hi guys,I wonder if any of you can help with a ignition switch wiring problem I have? I'm rebuilding a BSA A65,and sometime ago during the early days of the rebuild I bought a new aftermarket ignition switch(there was no wiring diagram with the switch as I remember and the A65 is not in original spec anyway).The switch is a standard off/on type and has 4 wires coming from it,a black/white,a green one ,a red one and a plain black one,can anyone identify these wires so I know which ones to hook up to what! I.E which is live and earth etc.Cheers,Paul.
Power goes in power comes out, that and a meter should get you working. Now a clever bloke will come on with the terminal #'s and the color codes as per original but does the re-pop have terminal #'s on the back? So that that will help? You still need a meter. The electrons don't care and you need the knowledge.
norbsa 1960 TR6 1963 Super Rocket 1965 650 Star 1966 441 1968 Thunderbolt 1969 Twinkle 250 1972 Fastback 1974 Roadster 1970 S.S Way too many BSA's not named http://decentcycles.com
Hi norbsa,thanks for replying,there are no terminals on the switch just the coloured wires.Unfortunately I don't possess a meter,I'm hoping (albeit naively) that the wires would have a known particular colour for in/out etc.I think the red wire maybe the live in and the plain black wire maybe the earth wire,that being the case what are the green and black/white wires for!
You need a charged battery, a marker light bulb(one filament), a pencil or pen and a piece of paper. Turn the switch on, connect one wire to the positive battery terminal. Hold the bulb shell on the negative terminal, and touch each remaining wire, in turn, to the center terminal of the bulb. When the bulb lights, those two wires are connected in that switch position. Make a note of every wire connection in every switch position. Then the wiring can be figured. I'd expect something like red to battery, black to ignition, green to pilot, black/white to headlight. Since this is a "universal" switch, all the wires may not be needed. Whatever, this is the first step.
Hugh: Proof the Dodo is not extinct 1964 Bonneville A couple others
Re: IGNITION SWITCH QUESTION#57923 11/11/0712:41 am11/11/0712:41 am
Internally, the switch has only two terminals, and it makes no difference to the switch which is which. Some of the wires coming out of the switch are undoubtedly connected to each other, either two and two or three and one. This can be determined with a continuity tester or an ohmmeter. Just see which wires have continuity to each other when the switch is in the off position.
My wiring diagram for (pre-1971) A65 shows one wire going to the power side of the switch, a brown/white wire that goes to the zener diode.
The diagram shows two or three wires coming off the other side of the switch, depending on whether or not you have an oil pressure warning light. The three wires would be: White for the oil pressure warning light, white to one of the coils, and brown/white to the lighting switch.
This would tend to imply that one of the four wires on the switch is intended for the "in", or power side, and the other three are intended for the "out" side, but check this first with your continuity tester.
you can get a meter for about 10 dollars at harbor freight it does come with instructions as i recall. I just ordered a universal ingnitiond switch from JC whitney for about 10 doallars also that has the wiring diagram with it. along with the univeras coil that got my t100 c going.
Kevy,The ignition switch you bought that has the wiring diagram,is it the type with spade ends or wires like mine.My switch has 4 wires coming from it,a black/white wire,a red wire,a green wire and a plain black wire,if yours is like this maybe you would be kind enough to post the wiring lay-out for me.Cheers,Paul.
You can buy a continuity tester with a battery and a light bulbfor about $3-5 at any auto parts shop.Just figure out which is the input or common lead, and then you can do whatever you care to with the 3 output leads. Try to do this sober, makes it much easier
Tom D. 1967 T120R Bonneville Anyone know of a place that sells Loctite by the quart?