Voltage fluctuation

[Yourpilotincommand]

My voltage fluctuates from 14.2 to 14.8 on my EDM730. I’m also seeing my old ammeter twitching.  Any advice? I’m suspecting voltage regulator or alternator. I almost want to install a capacitor to smooth it out. Unfortunately, I’m unable to upload video. Chris

[EricJ]

Check the field wire connection and other connections at the alternator, the firewall, circuit breaker and regulator (assuming you have an alternator), for security and corrosion.

[Ragsf15e]

100% what @EricJ said.  It’s likely that the vr and alternator are fine but you have a loose or corroded contact.  Check the connections at the alternator first.

[larryb]

In my Mooney it was the master switch. The terminals were loose in the body of the switch. But the problem can be anywhere in the field circuit.