High Voltages

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Jun 1, 2017 | 09:39 PM

#16

Gary Lewis

FTE Legend

Joined: Jul 2010

Posts: 32,875

Likes: 48

From: Northeast, OK

Quote:

Originally Posted by dnkensinger

I will test the voltage with the engine off/key on, but I had only tested coil voltage with the engine running so far, and it is slightly above 10 volts. I'm just not used to seeing that high of a voltage at the coil.

Good. Then we will know.

There probably isn't a meter made that can properly read that signal on AC, and certainly none on DC. But, when you turn the key on the ignition module goes low and current is conducted through the coil. So if a resistor is in the wiring the voltage at the coil will be less than battery voltage, and usually about 7 volts.

Jun 1, 2017 | 10:36 PM

#17

Tedster9

Post Fiend

Joined: Apr 2002

Posts: 19,311

Likes: 97

From: Waterloo, Iowa

Gary, you have an ignition scope? *drools*

Jun 2, 2017 | 06:51 AM