Testing coil is easy.
1. remove '-' wire from coil's '-' terminal
2. turn key to RUN test that you have 12v on the '+' terminal
3. place a spark plug wire from the coil to a test spark plug on the end and ground the test plug. Do NOT go through the distributor, you want just one spark plug hung directly from the coil's hi-voltage output.
4. using a test wire, wire one end to the coils '-' terminal and then ground the other end for no more than 2 seconds, within 2 seconds remove he ground and the plug will fire.
Testing for DME coil pulses requires a simply LED test light. You can get one at Walmart for $5. It must be a a 12vdc LED test light. Then test DME for coil pulses like this:
1. Remove wire from '-' terminal on coil
2. Place test light's '-' to the wire you just disconnected.
3. Place test light's '+' to the coil's '+' post.
4. Crank engine and watch test light, it will flicker as the DME generates coil ground pulses.
Quote:
Originally Posted by rick-l
You did I missed it.
I missed that also.
Might not be time to tear into the DME. Can you think of a way to verify the DME signal at the coil and the coil itself?
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