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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-19-2014, 02:52 PM   #1
SuperSleeper
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Join Date: Jul 2006
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My Ride: 2003 330CIC
DIY keyless entry

My key stopped working and I'm not going to pay BMW one more red cent. Looking for a wire schematic for the GM5 module. Need pinout and/or wire color schematic and voltage requirements/closed loop/open loop/ground/+12v, etc. Anyone know where I can find this? Everything I've found on google doesn't show me how I can short any of the wires to ground or power to activate lock/unlock.

I basically want to tap into the mechanism that locks/unlocks via the drivers manual key, but prefer to access the module wires directly vs. ripping the door apart to find the wires.
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Old 04-02-2015, 02:17 PM   #2
891CARLOS
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Did you figure this out?
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Paddle Shift Retrofit
Eonon GM5150/reverse camera
PKE + Keyless Push button start DIY coming soon
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Old 04-02-2015, 06:43 PM   #3
SuperSleeper
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I did. They are all ground based and can touch any of the wires direct to ground to activate which makes it easy. If you hold unlock open, it will fully drop the top or roll down your windows, etc, and vice versa, just as if you used the key in the door.

I used http://bmwgm5.com/ to find all the pins. MAKE SURE yours is this model so that you don't inadvertently ground out a wire you're not supposed to. You can EASILY purchase a $20 keyless entry system and wire it to this schematic. If you're worried about security, buy a better unit, or just don't leave anything valuable in the car. I carry insurance to cover this.
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Old 04-03-2015, 08:48 AM   #4
891CARLOS
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pm sent, hopefully you can help me out. Thanks
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Paddle Shift Retrofit
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PKE + Keyless Push button start DIY coming soon
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Old 04-03-2015, 07:13 PM   #5
SuperSleeper
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Standard disclaimer applies here, I cannot and will not be held responsible for any damage to your car by any instruction. If you perform any actions based on these instructions, you do so at your own risk.

For reference to others looking to bypass your key remote, you want to use the GM5 Key position pins for lock/unlock, if your GM5 is in good operation. If your GM5 is shot, you need to completely sever the power and common wires to each door and wire them directly to your aftermarket keyless entry system. I would only bypass GM5 as a last resort as you will lose basic features, such as auto-open and auto-close all windows, lock doors over 5mph, etc.
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