the radio was working before i wired the last speaker to earth having a silly moment. it just when i started the truck i had no sound come out the speakers. if i took the speaker out the equation it all worked fine truck has well (SO I WAS THINKING IT MUST BE BECAUSE THE 4TH SPEAKER WASNT WIRED ON THE ONE END KNOCKING SOUND OUT STARTUP) so i connected it up to the radios earth stupidly and it blew the whole trucks electric no nothing i will get out there later and look. its a 1990 90 so its old . nah im **** with car electrics