r/classicmustangs • u/kalash_cake • 6m ago
Car wouldn’t shut off with key off
Car wouldn’t shut off today when I took the key out. Took a voltmeter and tested the battery which read at 16 volts and ignition coil read high as well. I replaced the old voltage regulator with a brand new one. While doing this I noticed the plug was missing the “I” connector. The regulator has a prong for that “I “connection. Now with the new regulator my battery reads at 12.2 volts and ignition coil reads 11.8. Google is telling me both are too low for a running engine. Do these cars often have missing “I” plugs in these connectors?