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View Full Version : E46 center console wiring... need help with switched power


mquetel
01-05-2004, 01:41 AM
I spent a good chunk of today attempting to complete an XM install. The idea is to hard wire an XM Roady at the center console tray by running the OEM aux input down then tapping into the switched 12v that is (supposed) to be there in the phone harness using this adapter. Well, I got the aux input done, no problem. I then mounted the XM antenna on the rear deck and ran the wiring under the child seat hook into the trunk. Followed the existing wiring harness into the car, then ran the antenna feed under the rear seat and carpet into the center console. Finally I tapped into the existing phone harness as suggested by these two nice write-ups: first (http://www.pbase.com/jeffwong/centerconsole) and second (http://forum.e46fanatics.com/showthread.php?threadid=119418).

Now starts my problem. I tapped into the violet and white wire assuming that is switched power (numerous online sources indicate it is). I find two brown wires (again, numerous sources indicate brown is ground). The first is a larger guage wire that is in the phone bundle, but instead of terminating at the connector, it loops back under the carpet where the wires originate. The second is the same guage as the power and terminates at the connector. I decided to tap into the larger guage wire assuming that is the ground (later I read in the 2nd writeup that the larger guage wire is not ground, but something else :( ). I plug everything in, turn the key and no power to the XM reciever. I took the connections apart, re-read everything, then connected back to the violet/white for power and changed to the smaller brown for ground. Again, nothing happens.

At this point, I temporarily abort the project and go buy a volt meter. :paranoid:

Later, checking those two wires (with the key in and the car powered up) it indicates that I'm getting no power at the location.

So... thanks for sticking with this so long... I have questions:

- Should I expect that harness to be powered?
- Did I perhaps screw the pooch tapping into the larger guage brown wire assuming it was ground?
- If I need to check a fuse, how and where would I do that?
- Anyone have any suggestions? I'm stumped at this point.

Oh, and yes, the reciever works when I plug it into the cigarette lighter.

Thanks in advance for any helpful insights and suggestions.

mquetel
01-05-2004, 09:29 AM
FYI, I cross-posted this HERE (http://www.bimmerfest.com/forums/showthread.php?t=49401) with some interesting responses.