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Originally Posted by david_w2k
Thanks for the quick responses! I multimetered the fuses. It appears that maybe (i cant tell because i may be checking the wrong cables, i will check it properly shortly...), the constant supply has failed. Is it possible that the cd player requires both the supplies to work correctly?
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Yep - most head units need 2 suply's - one for retaining the memmory codes ect and one to power the unit. Some have a third that controls the backlights when the head unit is on......