Thread: No spark
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Old July 15th, 2017, 01:40 AM
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Default Re: No spark

Hook a wire (jumper) from battery positive post to coil positive terminal and see if it starts or fires using starter switch. Don't disconnect or change anything. Be prepared to disconnect the jumper in order to stop motor. Do that before checking switch. Do that next thing and report.

Make sure you have put everything back together before you do this test. If it does not fire, do the same test again looking at one spark plug gap. Don't have the plug near it's hole and do it in darkness. Again be prepared to pull off the jumper. See if you have spark.

I see James has commented while I was typing. That second wire, as he says, is probably the wire that goes to the Ignition switch. If you know how, you can disconnect it at coil, take ignition switch out of dash and let it hang, find the "on" or "run" terminal, take wire off that terminal. You do not want to take a chance that this wire has voltage. Both ends loose, do a continuity check (ohms). After setting meter to ohms, touch one lead to the detached coil wire and the other lead to the detached run wire and see if there is a reading. Most digital meters read zero when there IS continuity and read 1 or OL when there is no continuity. Does not matter what color meter lead is on what end of wire. Some meters will buzz/beep if there is a connection, so set to buzz if you have it. Do this after the above start test is done.

Last edited by AZKen; July 15th, 2017 at 02:22 AM.
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