Re: Attaching an after market coil

Posted by HH56 On 2017/11/8 11:36:28

That would be correct. With a positive ground car the wire coming from the ignition switch would be on the negative coil terminal and the positive terminal would go to the distributor.

With ignition key on you should read 6v between the negative coil terminal and block. On the positive terminal, it will vary. If the points are open you should have the 6v and if the points are closed it should read in the range of 0 to around .3v. A reading closer to 0v is better.

If it never goes to the low 0v side either the points are not closing or has oxidation on the contact surfaces. It could also be that somewhere the wire to dist and points is disconnected. If it never rises above the 0v side look for a short in the distributor. If the dist uses the short flexible wire to connect points to an outside terminal check that wire or possibly there is a shorted condenser. If the points are closed but the voltage is higher than about .3v then check for a poor ground at the distributor or oxidized points.