Few questions with the 240sx

[b.arry]

Ok a few questions. Sometimes when i turn the key to ACC the windsheild wiper will go one time then when it goes back down it wont go agian unless i turn the lever down like its suppose to.

My clock in the dash always resets when the clock gets turned off. Fuse problem?

And also my trunk wont open with key or the engage.

and last i was installing a jvc radio into it but everytime it turns on it turns right off. It will take the cd in then shut off and spit the cd out and turn off but besides that it wont turn on. Is it a bad head unit or something with my wiring.