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Message: <blockquote data-quote="Worlddre" data-source="post: 5750876" data-attributes="member: 556661">Well things to look at and think about while doing the install1. what doesnt work without that harness connected and the aftermarket radio connected. (i doubt it will throw any codes in an 03)2. If something isnt working such as am or fm reception or no sound or the like plug the factory radio back in and meter these wires with the radio plugged in to see what the radio does if anything for these wires while it is connected3. turn on the lights and check for dimmer4. if it has steering wheel controls meter for that too (wire status will change to some degree when a steering wheel button is pressed.9 out of 10 times these things will get you through the hardwire without needing any help. And these are common troubleshooting practices that a shop should know to do off the top.</blockquote>

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