ok yesterday i went to my local car audio shop to have them install my new radio and when i went to start my car this morning i found that 1. inorder to turn on the leds on my radio i have to turn on my headlights.... 2. we just got snow and i tried to use my windshield wipers and they dont turn on now... and 3. only my rpm gauge works, no other guages are working, im taking my car in to have them look at it and fix it because this is a huge problem but i was wondering if anyone would know whats wrong, i dont believe its the fuses
thanks

They could have blown a fuse or 2. or left something unplugged or hacked a wire and caused a short. either way take it back it sounds like something that they did.