my truck doesn't start after it rains, what should i do?

Sounds like wires or more likely distributor cap. I would get new cap and rotor. Try that first. Be careful when replacing cap to get wire correctly positiined, do one at a time.

Use AC Delco plugs, factory supplied and recommended,and check the seal between the hood and wiper cowl, water may be entering there, or just corroded cap terminals, recommend to get brass terminal version and new rotor and even wires.

also check your coil if u have a bad coil and it senses dampness it will run very rough and if it detects to much damnness it wont run at all until it drys off

since i have no dist cap,my husband told me to open the hood and beat on the box on the top on the drivers side.starts every time.can anyone tell me what is in this box that causes it to start?

I believe its the fuse box.

I am having this same issue. I changed my battery out and it will turn over. Something is getting wet under the hood causing it not to crank. I am thinking moisture is getting under the distributor cap or the coil is getting wet.