No Spark at all

[majicwrench]

I would never ever recommend that someone start jumpering things like mentioned above. NO need, and potential for real problems resulting.

[76was124]

I would never ever recommend that someone start jumpering things like mentioned above. NO need, and potential for real problems resulting.

Okay, I 'lll take your word for it.

To me, low voltage is harder to diagnose, than 'No' voltage. So how do you determine if the problem is on the ignition switch side or the point side of the circuit?

What about using the procedure I outlined only instead of a wire, use the leads from a volt meter with one lead on the opposite battery terminal, the other moving through the connection points? Or are you concerned with trying to stick anything metal around the various connections?

[spider2081]

So how do you determine if the problem is on the ignition switch side or the point side of the circuit?

I think the tests I posted before your first post point to the area of problem. Fact is there could be more than one problem causing no spark.


Checking the + terminal of the coil for battery voltage with the ignition switch in the "start or run" position regardless of point position tells one if there is a problem before the coil. With the points open or closed the + terminal of the coil should be battery voltage. If it is less, that is a problem or problems between the battery and the coil.

With respect to the "D" terminal of the coil. With no wire on this connection you should measure battery voltage. This checks the coils continuity between the + terminal of the coil and the "D" terminal of the coil. With the brown wire connected and the points open you should read battery voltage. With the brown wire connected and the points closed you should measure zero volts. If the voltage is more than Zero there is a bad ground connection between the coil "D" contact and the distributor's mechanical ground to the engine.


I don't think there is any need to add jumpers.

[seabeelt]

Now here is a silly question for LMS... Are you trying to start the car with the relay in the photo missing ( relay between the black and silver one)?
R/