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<blockquote data-quote="Carbon Summit" data-source="post: 5207354" data-attributes="member: 603964">I&#039;m not using the factory harness at all. The problem occurs if the key is turned on or off. Tried to eliminated that whole harness problem by pulling the lighter/radio fuse. I check for voltage with the fuse pulled and its zero (obviously, but figured I&#039;d better check in case) then I put the fuse back in and the lighter and the radio hot wire only read 11.86 volts. The battery reads 12.37 volts. Remember the car has not been started in a few days and I&#039;ve been messing with this so the battery is probaby down a little.A few questions for thougth:If the fuse is pulled from the radio harness wouldn&#039;t that eliminate the problem if it is there?Why did the amp work but not the head unit when hooked to the battery, with the battery hooked to the car?When I have the head unit hooked to an external battery and all works (I don&#039;t have the antenna hooked up or it wont work) why if I touch a ground wire from the car to the chassis of the head unit does it stop playing music?</blockquote>

[QUOTE="Carbon Summit, post: 5207354, member: 603964"] I'm not using the factory harness at all. The problem occurs if the key is turned on or off. Tried to eliminated that whole harness problem by pulling the lighter/radio fuse. I check for voltage with the fuse pulled and its zero (obviously, but figured I'd better check in case) then I put the fuse back in and the lighter and the radio hot wire only read 11.86 volts. The battery reads 12.37 volts. Remember the car has not been started in a few days and I've been messing with this so the battery is probaby down a little. A few questions for thougth: If the fuse is pulled from the radio harness wouldn't that eliminate the problem if it is there? Why did the amp work but not the head unit when hooked to the battery, with the battery hooked to the car? When I have the head unit hooked to an external battery and all works (I don't have the antenna hooked up or it wont work) why if I touch a ground wire from the car to the chassis of the head unit does it stop playing music? [/QUOTE]

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