#1
About three weeks ago I purchased a 1983 Fender Strat. It's been working amazingly since then but tonight I attempted to practice with my bassist and all I could hear out of the amp was buzzing everytime I touched the strings. I know its not the amp or chord because I used my other electric.

Could the wiring have gotten loose? How much does that usually cost to fix?
#2
quite possibly its the wiring gone loose but i'd also check ur switch.
Sincerely,
Shitstirrer
#3
its a vintage so i dont even wanna bother trying to troubleshoot with you...cant say for sure but i do worry since you just got it

it does sound like a d/c ground though...as for a quote it depends, make sure you tell them its a vintage though...might cost you a bit more but they might also take special care of it
#4
1983 isn't vintage. No doubt, a very nice guitar, and that the wiring has just gone a miss. If you know what you're doing, take the scratch plate off and have a look, if not, take it to someone who does.