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<blockquote data-quote="DCR" data-source="post: 8166533" data-attributes="member: 569446">I have just purchased, haven&#039;t received it yet&#039;, a Sony CDX-A30 it is an old cd changer with a separate a box for the changer that goes in the trunk, a slim control module, and two other boxes one of which is the FM tuner. Here is my problem that I desperately need help with, it does not have the power harness that supplies the unit with power and one does not seem to be available. Here is what I have figured out so far the module where the power harness plugs in has rca outs for front and rear speakers, so I believe it&#039;s preamp only, so I think the power harness should only require a switched +, an always on + for memory, ground, a + out to power up the amps, but I am not sure what else. The socket where the connector goes has 9 pins, so I am not sure why so many.How can I determine what pin is what. I figure I can find the ground with an Ohm meter, but what about the rest? Thanks for your help.</blockquote>

[QUOTE="DCR, post: 8166533, member: 569446"] I have just purchased, haven't received it yet', a Sony CDX-A30 it is an old cd changer with a separate a box for the changer that goes in the trunk, a slim control module, and two other boxes one of which is the FM tuner. Here is my problem that I desperately need help with, it does not have the power harness that supplies the unit with power and one does not seem to be available. Here is what I have figured out so far the module where the power harness plugs in has rca outs for front and rear speakers, so I believe it's preamp only, so I think the power harness should only require a switched +, an always on + for memory, ground, a + out to power up the amps, but I am not sure what else. The socket where the connector goes has 9 pins, so I am not sure why so many. How can I determine what pin is what. I figure I can find the ground with an Ohm meter, but what about the rest? Thanks for your help. [/QUOTE]

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