I have a 1987 bmw 325 e... i just added my amp n subwoofer a while ago. i let someone did it for me and after a while i notice my left signal light is goin a lil crazy. when i use the left signal light , it goes flashin really quick liike every 2 times a sec and wen i press teh brake the left signal light goes off until i release the brake again. is it the wiring for the amp and sub??? also do you guyz know anything call uneo or unco a gray box under the dash of a bmw? ( theres a wire thats not plug on the other side , and i dunt knwo where it goes)
thanX for helpin | 
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