This is extremely strange and may not have anything to do with the rain. There could be a short in the wiring system that is triggered by the atmospheric pressure in the air.
you need a new ignition tumbler.
If a 1987 Chevy Suburban has lights and horn, but no ignition, gauges, radio, or interior lights it could be a ground wire problem. It is possible that there is a short somewhere. Also check the dome light for a possible water leak in the headliner.
This is the electrical wiring that is used for lights, ignition, radio etc that is in a car
the baterry
I asked that question when my 208 went in for its first service. The answer was that you can't. I have never known a car that has a radio you can't listen to without having the ignition on. Has it not occurred to them that you may want to listen to the radio whilst waiting anywhere?
Ignition off draw fuse/circuit It is used for dome lights, radio memory, etc.
IGNITION SWITCH, UR RADIO'S SECONDARY POWER COMES FROM THE IGNITION SWITCH SO WHEN U TURN YOUR CAR OFF THE RADIO AND OTHER ACCESSORIES TURN OFF AS WELL.
Check all the fuses.. My power locks, radio, dome lights werent working. I looked at the "Radio-CLock" fuse it was good. I checked the others and and "Aux" fuse or seomthing was bad.
Check the ignition switch itself, sounds like it may be the problem.
Retained Accessory Power. When the Ignition is turned off, power will stay on for a short period of time for things like the radio, and interior lights.
If auto, it can be the neutras switch and if standard, it can be the clutch switch. Otherwise, take it to a garage as it can be the starter, solonoid, ignition switch or ????
it may not be you ignition relay, but your alternator.