Why doesn't my tail light work? It just quit. So I replaced the bulb. Still nothing. Tried another new bulb. Nothing. Checked bulbs on a six volt battery, and they're fine. Checked power with a test light at tail light, and it's good, but as soon as I install a bulb, no power to it.
If I connect my test light to the neg and pos terminal of the actual tail light socket I have power, but if I install a bulb I do not. If I check for power with a bulb installed, test light will not light up. I don't know actual voltage, as my cheapo Amazon multi meter decided to take a shit. The separate brake light works fine. I have checked ground connections at wiring block and frame.
What's the dealio?