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Old 09-26-2012, 07:23 AM   #28
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Join Date: Jul 2012
Location: Portland, OR
Posts: 3,414
My Ride: 2003 330CI Silver
Originally Posted by benzovs View Post
Yes you have to run the cables up into the headliner through the rubber boot that your rear view mirror cables are in. Once you are in the headliner, you have to go the driver side or passenger side A pillar. Look at the picture where I show the passenger side a pillar. That is where you can run the cables through. It is very easily done with the long zip tie. You can buy it at home depot/ lowes for about $5. If you don't have an aftermarket alarm, then you will have to use a SPDT (single pole double throw) relay to wire up the LED. You will have to use the N.C (normally closed) portion of the relay. You will wire it up to your ignition 12v +. So basically what will happen is when your car is off your led will light up, and when the car is on, it will turn off. If you have trouble wiring up the relay, let me know and I will post a few pics of how to wire it up.
Hey wait a minute. You're telling me they have this SPDT relay where I can connect a +12v switched power to it, and instead of providing power when the car is at least in position 1 of ignition, it'll provide power when the car is off? now would this idea of mine work then? I don't have a ugdo or plan on having one. the power wire for that is a switched source right? couldn't I (yeah, I'm so lazy I don't want to run a single wire) tap my power source from that wire in the headliner somewhere close to the rear view mirror? where would I put that spdt relay at? is there a specific spot it should be at or anywhere along that line? oh and as for the switched ground wire I think you were saying, would that still be required as part of this installation if I chose to go the spdt route? if I still need a switched ground, I'm pretty sure I can't use the clown nose ground, or can I? Please help. I have the led just sitting inside that rearview cover, waiting for power to let it shine. I'll take pics of my setup when I get it lit up.
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