Gotta stop trusting those cheap USB cable testers

Last Thursday I was chasing a no-comm issue on a CRJ-200 at KLAX. Used my cheap $12 tester from Amazon to check the USB charging ports in the cabin - said everything was fine. Turned out the shield ground was open on 3 of them after I finally broke out the megohmmeter. Anyone else find those little testers just give false confidence?

3 comments

3 Comments

matthewkim8d ago

Cheap tools just make you think you're good enough until you're not.

graygonzalez9d ago

Those cheap testers work fine for basic pass/fail checks, just don't expect lab-grade diagnostics.

barbaraw479d ago

Did you try a known good power bank next time to narrow it down faster?