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Re: Where does the wires go on the ignition coil Positive...
It makes no difference really but with the spark plug wire towers facing the engine, most of the time the hot wire is on the right side and the wire from the points goes to the left side of the coil.
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For the 1972 VW Beetle, the ignition coil is typically connected to the positive terminal of the ignition switch, and the negative side of the coil is connected to the distributor. The distributor then sends the spark to each spark plug to ignite the fuel in the cylinders.
The wires going to the ignition coil should be two different colors: one for the positive side and one for the negative side. The positive wire should be connected to the ignition switch, and the negative wire should be connected to the distributor.
Regarding the voltage regulator, if you are not getting any current on one side of the prongs, it could be a sign of a faulty voltage regulator. However, it's also possible that there could be a wiring issue or a bad connection.
One way to test the voltage regulator is to use a multimeter to check the voltage output from the regulator. You can also check the wiring and connections to make sure everything is secure and not damaged.
It's worth noting that the generator and voltage regulator system in the VW Beetle is a bit different from modern alternator systems. If you are not familiar with working on vintage VWs, it may be helpful to consult with a mechanic or VW specialist who has experience with these types of systems.
Double check your wiring---On a dual fire coil, the Orange and Black wires will connect together to the negative side of the coil... using a single fire coil, the Orange wire will be used for the front cylinder negative terminal and the Black for the rear cylinder negative terminal ...hope this helps.
You have the wrong coil for your bike. This coil is designed to be used with a "single fire" ignition system. If you have the stock ignition system on your bike, it is the original "dual fire" ignition. Harley has used a dual fire ignition system on all their bikes except a very few years ago. Try to exchange the coil for the correct one where you bought it.
The original wires, one blue and one white, were with the points ignition. The white wire should be the "Hot" wire. Now, look at your wiring diagram. The two white wires should go together to one side of the coil and the blue to the other. There is no positive or negative side of the coil, just two small primary winding terminals. Make sure the white wire from the ignition system is the "hot" or power wire for 12 volts. If you connect the ignition unit up backwards, it will damage it. To make sure the white wire on the bike is the hot wire, simply turn the ignition switch on and check this wire with a test light or volt meter. It should show battery voltage on it. That should be your setup, two white wires on one end of the coil and a blue wire on the other.
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