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<blockquote data-quote="Slody4Futbol" data-source="post: 1044911" data-attributes="member: 551839"><p>well a relay won&#039;t help you if you&#039;re not running a new power wire up to the unit... just figure out which one is constant... and which one is ground... and use those... there is not a true switched wire that comes on with the ignition... there is a wire that will either be positive switched or negative switched when a door is opened to turn the domelight on... so use your DMM and figure out the 2 wires... you will have to put ignition and constant together... you could also use the fusebox if you didn&#039;t want to try to find the wires behind the headunit... but the metra harness is a 5520 if you have it in your shop or have access to it...&nbsp; but the constant wire is gonna be a big thick wire in one of the corners of the harness... the switched ignition... is diagonal from that wire... in the middle set of wires... it&#039;s in 1 of the 1st 2 rows...</p></blockquote><p></p>

[QUOTE="Slody4Futbol, post: 1044911, member: 551839"] well a relay won't help you if you're not running a new power wire up to the unit... just figure out which one is constant... and which one is ground... and use those... there is not a true switched wire that comes on with the ignition... there is a wire that will either be positive switched or negative switched when a door is opened to turn the domelight on... so use your DMM and figure out the 2 wires... you will have to put ignition and constant together... you could also use the fusebox if you didn't want to try to find the wires behind the headunit... but the metra harness is a 5520 if you have it in your shop or have access to it... but the constant wire is gonna be a big thick wire in one of the corners of the harness... the switched ignition... is diagonal from that wire... in the middle set of wires... it's in 1 of the 1st 2 rows... [/QUOTE]

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