OEM Remote locking install in a MK4
Initially my car had no remote locking, nor power windows. The car came with a 1C0 962 258 J central locking module, which I replaced by a 1C0 962 258 G + some wiring to get OEM remote locking functionality.
Replacement module
If your car currently has a 1C0 962 258 J central locking module, you can replace it by one of the following modules:
Tested:
- 1C0 962 258 G
Possibly work too:
- 1C0 962 258 P
- 1C0 962 258 AB
- 1C0 962 258 N
Remote
I am currently unsure which remote belongs with the replacement modules. I went to my local locksmith which had a bunch of different remotes, and I tried which one would pair with my module. Unforunately this key does not have any description on it to tell me which type it is.
So my recommendation is either: Get the keyfob from the car that the replacement module came from, or try a bunch of keys at your local locksmith or junkyard.
Wiring
The existing green and gray connector plug into the new module directly, and everything will work as it used to. The new modules has one additional 15-pin connector which fits the beige plug pictured on the left below.
The functions of the pins on this connector (T15) are:
| Module Pin | Wire color | Wire size | Function |
|---|---|---|---|
| T15/1 | Brown/Red | 0.5mm^2 | Hood contact switch |
| T15/7 | - | - | Antenna shield |
| T15/10 | - | - | Antenna |
| T15/11 | Black/Yellow | 1.5mm2 | Alarm Horn |
| T15/12 | Red/Yellow | 1.5mm2 | 15A Fuse, 12 V (Alarm horn) |
| T15/13 | Black/Green | 1.0mm2 | Right turn signal |
| T15/14 | Black/White | 1.0mm2 | Left turn signal |
| T15/15 | Red/Black | 1.5mm2 | 15A Fuse, 12 V (Turn signals) |
Wiring diagram for remote locking and alarm.
Antenna specifications
Use a coaxial wire, like RG174 for the antenna wire. The shield of the wire needs to be removed for the last 17.3cm of the wire. Attach the shield to T15/7, and the core to T15/10.
Help improve this page
Please contact me with information to improve this page, for example:
- If you have more information about the required keyfob. For example a link to one that works, a part number, the frequency, etc.
- What central locking module you used as a replacement, and if it worked correctly or not.
Then I will add this information to the page to help others.