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post #3 of (permalink) Old 07-14-2014
f150tr186's Avatar
Joined: Jul 2011
Location: Staten Island
Posts: 39
Mach 460 2003 requires Metra harness 70-5519.
The black plug provides high level signal for the tweeters and to the amps for the mids. The white plug (smaller) has 2 rca male ends that go to the sub out low level on the radio. The blue/white wires will go the a 5 volt remote turn on signal from the radio. You can build your own voltage divider using 2 resistors. One resistor about 500 ohms, and the other about 600 ohms. You want to grab your power from the 500 ohm resistor (5v).
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