Electrical issues: washer pump & stereo

[Big69C20 Toy]

the two problems arent related but here goes

Got my new washer pump from Paul and put it in, works fine and squirts very nicely, only problem is it squirts all he time, not just when i press the button. what's up with that?

2. when i got my interior all painted i was going back to set up my stereo. Well i had this all set up before and all of it was hunky dory and just fine. Well my batt was dead so i had it replaced. alright i install all my equipment and now i'm getting nasty line noise going on. with the motor running it sounds like i've the engine in my speakers, not so nice. I switched the amp from being powered from the fuse panel to being direct line to battery, all my grounds go to the battery. well i thought i'd switch back to fuse panel powered amp and it still makes all that horrid noise, even with the engine off i get buzzing something fierce.

dunno what to do. thanks for any help guys