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DIY: Do It Yourself
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Old 04-29-2007, 07:59 PM   #1
Registered User
Join Date: Jul 2004
Location: Boston, MA
Posts: 1,015
My Ride: 88' BMW E30 SETA
Send a message via AIM to Ivegotissues666
DIY: OEM Autofolding Mirrors w/ Reverse Tilt!

I told everyone I would get around to it, and well I finally have, so here it is. OEM way of autofolding mirrors with Reverse Tilt. I am sure this retrofit is possible for 6 pin mirrors as well just probably a slightly different wiring configuration.

1 - A set of Autofolding mirrors (This DIY is for 12 pin mirrors)
1 - Autfolding switch (6 pin) - P/N # 61316901383
2 - Memory Modules - P/N # 61356916054 (You need 2 of these , and they run around $60-70 each)
12 - Pinouts for the 12 pin plugs - P/N # 61130006663
2 - 12 pin plugs - Consists of 2 - P/N# 61131383650, and 2 - P/N# 61131383736
6 - Door Harness male pinouts - P/N # 61130006664
1 - Fuse connector - P/N# 61138377731
3 - Ground and K-bus connectors - P/N # 61131387144
5 - t-taps
1 - 5 Amp fuse
Assortment of different colored 6 gauge wiring

Old Switch:

New Switch:

Tools need:

Wire crimpers/soldering iron
1/4" Drive Ratchet with 8mm socket
Philips Head Screwdriver
Assortment of Torx Bits

Step 1:

Disconnect the battery

Step 2:

Remove Front the door panels, instrument clustor, knee bolster, and hood release lever trim panel.

Remove these 2 top torx bolts to remove clustor:

Step 3:

Working at the drivers side start but disconnecting the door harness, this is accomplished by removing the one 8mm bolt securing the rubber gasket for the harness. Once removed, tilt back and remove just enough to lift p the locking mchanism that secures the 2 connectors together (Similar to the seat connectors)

Step 4:

Next what I did was installed 3 male pins P/N # 61130006664 into vacant slots Pins 23, 24, and 25 (Behind the hood release panel)

Pin 23 <---> Run wire Fuse positon 57
Pin 24 <---> Run wire to Pinout 14 at the Instrument Clustor and tap pinout 14 (Red/White/Yellow wire this is the K-bus signal)
Pin 25 <---> Ground

and installed on the female side 3 pins (The harness that comes from the door) P/N # 61130006663 to pins 23, 24, and 25 at the door harness itelf

Pin 23 <---> Pin 1 @ White Plug
Pin 24 <---> Pin 2 @ White Plug
Pin 25 <---> Pns 7 and 8 @ White Plug

Before I go any further here's a breif schematic of how the memory module is setup:

To the White plug on the module:

Switch <---> White Module

Pin 2 <---> Pin 4
Pin 3 <---> Pin 11
Pin 4 <---> Pin 10
Pin 1 <---> Pin 5

Ground Pins 7, and 8 on the white plug (What I did was spliced them together and connected them to Pin 25 on the door harness connector, then I grounded the interior door harness connector at Pin 25

Door Harness Connector <---> White Module (Drivers Side Memory Module)

Pin 23 <---> Pin 1 (12V from Fuse 57 (5 amp fuse)
Pin 24 <---> Pin 2 (K-bus signal)

To Black plug on the module:

Just connect the 12 pin harness from the mirror to the black plug on the module.

Step 5:

In order for the car to distinguish what signals what, I decided to it was best to disconnect all 6 pins at the switch that went to the door harness. Now since the new autofolding switch only uses 4 pins I simply tapped 4 of the wires at the switch and ran my new wires like I mentioned above.

Switch <---> White Module

Pin 2 <---> Pin 4
Pin 3 <---> Pin 11
Pin 4 <---> Pin 10
Pin 1 <---> Pin 5

I taped off the ones I disconnected and tucked them away.

K-Bus Signal @ Clustor:
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