Points circuit to ground isnt complete

Posted by John T on May 22, 2012 at 11:33:30 from (216.249.82.117):

In Reply to: SH not sparking. posted by GordoSD on May 22, 2012 at 08:53:40:

I agree with Bob M.....Since the engine dont tend to stop on the TDC of a piston under compression, the points are usually closed, they open at TDC of a piston to fire that pistons plug THEREFORE with the ignition on and her just sittin there Id expect 6 volts on the coils LV primary input BUT ZERO VOLTS (with respect to ground) on the output where the coils LV primary output wires to the distributor.

If not, the points arent closing or arent wired right or the wires bad from coil to distributor or the distributor or points arent getting a good ground. Check the wire inside the distributor from the points terminal to the pass through stud where the coil wires !!!!!!!!!!!!!!

The coil cant ever conduct current until the points are closed and the to ground circuit (via points) is complete,,,,,,,,,,that means a test lamp on the coils LV primary output should go OUT when poinst are closed as that becomes ground

Run my Troubleshooting Procedure for more detail..

John T

• John T's Ignition Troubleshooting

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