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Old 02-15-2012, 02:36 PM   #11
nickstewartroc
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See that's the point of the relay, it's a small current load (very small) and will just act a "switch" to split the always on 12v to the acc on the radio
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Old 02-15-2012, 02:44 PM   #12
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Oh ok. I understand what you're saying now. Use one side of the relay to the accessory on the HU, the other to the ignition and then the constant 12V+ on the HU to a seperate 12V+ source. That will work just fine then
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Old 02-15-2012, 02:45 PM   #13
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Sweet looks like I'll be ordering some Audio stuff now haha
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Old 02-16-2012, 09:54 PM   #14
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The accy wire at the ignition switch it is not necessary to run a relay for it. Aftermarket head units get all their power from the constant wire (yellow) and the accy wire acts just as a signal (similar to a remote wire for an amp) When I was an installer I would just fuse my splice with a 3 amp fuse and never had a single problem. would using a relay hurt? no but it would be easier and less to try and hide
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Old 02-17-2012, 12:58 PM   #15
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Awesome! I didn't know that, thanks! Would you happen to know what color wire it is off hand? Or where to locate it? Thanks!
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Old 02-17-2012, 01:04 PM   #16
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It should be brown/yellow and on the ignition switch on the black 7 pin plug it is pin number 1 on that. Hope this helps. Make sure to double check ALL connections and verify they are what you think they are before doing anything.
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Old 02-17-2012, 09:27 PM   #17
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actually its purple with a green stripe if i am correct unless they changed it
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Old 02-17-2012, 09:28 PM   #18
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just looked it up brown/yellow is ignition purple/green is accesory
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Old 02-20-2012, 09:20 AM   #19
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Well I attempted to pull the purple/green wire from the a/c control unit. Doesn't work :/ as soon as the controls are activated, the voltage drops to .5v Still looking to find where to pull from easily-
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Old 02-20-2012, 07:31 PM   #20
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you have to go to the ignition harness. take the black plastic shroud off the steering wheel (yes it will be a pain in the ass) on the left side of the steering wheel (if you are looking at it) there will be a black harness with 5 or so wires tied into it. there should be a purple wire with a green stripe there. to make sure you have the right harness unplug it and then try to start the car. if the car does not turn over you got the right harness
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