1999 Mazda protege factory unit

MJD

Member
I'M installing a new cd deck and i got a wire harness that has 4 pin and 8 pin attachment. But what is that black connetor behind the factory deck?
Is that the ground?
Thanks for any info
I got a american international wire harness MWH-856 CLF
 
it's not the antenna
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Hey i have a question about the factory radio. My car got broken onto so i put the factory radio back in. then i had my dashboard replaced so now the radio backlight is on when my headlights are off. then when i turn my headlights on my radio backlight cuts off. So at night my dash is pitch black anyone know what could be wrong. The radio is hooked up the only way it can be
 
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