Most comonly this problem is caused by the lighing connector on the tailight assembly . check the last pin on each connector and you may find the ground wire pin burned and needs repair, also the connectors are known for developing poor contact. which you can repair by carefully melting solder on the male pins.
Rain
Sounds like water from the rain is completing the circuit. It's most likely the earth/ground that is missing (as the rain is completing the CCT - rather than creating sparks)
If you have tools etc you could try to locate or test with a wire patching in a new earth to the bulb. Or measure the voltage on the bulb connections. Test resistance from the earth connection to the chassis.
Failing that you can just take the hose to the car and find where the hose turns the lights on and have a deep look there.
Start with checking the fuses.
That is the correct spelling of the plural noun "taillights" (car lights).
In the fuse box, it controls the dash lights and taillights.
Back track on your connects and ground wires. I bet that does the trick. If not test your sockets and fuses. fasttony46@yahoo.com
sometimes the head lights and tail lights may be fused separately,check your fuses.you could have a bad ground.thats just two places to start.
Is it the taillights or the brake lights? If taillights it may be a wiring problem, If brake lights check the switch on the brake pedal
Your dashboard lights suddenly not working is almost always your indication that your taillights are out. If the fuse for your taillights is blown and you replace it, your dash lights should be fine.
check the bulbs?
This is an inconsistency of the English language.Headlights is spelled with one word, yet tail lights is divided into two words. The reason given is that taillights is awkward for reading.
The obvious would be the bulbs are burnt, then look at the fuses for the taillights, and then the wiring. The holders where the lights themselves plug in are bad sometimes; you can get them cheap at a pick-a-part yard.
There is a fuse box under the hood (passenger side). I know the the fuses for the head lights are there. The fuse for the taillights is there and is labeled. This fuse includes the running lights but is not labeled as such.
Added to that, and assuming that you're asking because your license plate light is out, and because the fuse is the same fuse for the tail lights, then the problem is not the fuse. It's the license plate light itself. === It should be the same fuse as the taillights.