Originally posted by Silversurfer
please as I understand you dont wire ground to the negative of the battery. Thanks in advance
dude in dc supplys ground is negative so to speak! if u mean on the boat u should have a negative rail or bus bar maybe... if not find a suitable local earth(make sure it aint a switched one) and it has sufficient wire capabilitles to handle extra juice of ur stereo or run a new one!
If you mean on the stereo it should be the black wire but if its missing/damaged you can just use the stereos metal chassis or outside case as the pwba inside will be earthed through it!
Ur old stereo should have had one! get a multimeter and beep test the wires to -ve on battery one should turn up! unless its earthed through speakers but thats serously old stuff and wen mounted to a metal car so i doubt it very much!!
If you want tell me what stereo came out and want one you want to put in and what colour wires, i may be able to help!
The car stereos follow a convention nowadays on wire colours!