Quoted from jid:Here is a weird one: I have my TZ which had LEDs in it before I bought it.
I had a camera mod on it that never lit up (it was there when I bought the machine). So I figured I’d just replace it. New camera mod won’t light up. The bulb in the regular socket does but the camera won’t. Vendor ships me a replacement presuming the bulb in the mod is bad… same thing. So I’m on 3 cameras that don’t light up.
Any good way to bench test a 12VAC bulb?
I believe that is a DC circuit. It sounds like whatever that mod is attached to has a bad drive transistor or the alligator clips have fallen off the source flasher. Doesn't that mod just piggyback off another circuit? If so, move it to a known good circuit for testing.