Auto lock feature – 1998-2002 Honda Accord

HI have been wanting to add an auto lock feature on my 2001 Honda Accord for quite some time now. The idea is to have it lock when I shift out of Park. Since I do not have an aftermarket alarm, I had to improvise. I have found this module that is cheap and will do the job. It is 452T Pulse Generator and bought it from Amazon.  The way it works is that it monitors voltage from a source and it sends a pulse of voltage to the output wiring when it detects a change. I just had to locate the Park wiring. In this case, I located Park and Neutral wiring.

Here’s the link.

and this is the manual it came with


Items and tools used

Soldering Iron/Solder (Optional)

Electrical Tape

OEM connectors (I pulled it from the junkyard) (Optional)

Tap Connectors from Harbor Freight or Autozone (18-22 gauge)

18-22 gauge wire about 6 ft (I used 12 gauge since it is the only wire I had.)

Heat shrink (Optional)


Before doing any electrical work on your car, it is recommended to unplug your battery. This will help prevent any short to any electronic parts in your car. I will not be responsible in any damage that will occur during this mod. This worked for me and it does not mean it will work perfectly for you.

I only used five out of the nine wires from the module. I will divide it into two groups. We will have to tap these wires into our existing car wiring using the tap connectors.

I recently pulled some connectors from the junkyard and so I soldered these connectors to the wires so I can easily detach it and looks cleaner. (Except the electrical tape. I didn’t have heat shrink at the moment) You can solder or just use tap connectors.

1st Group: this is located under the passenger left foot area. It will require you to pull the carpet a little bit to locate the Multiplex Control Unit. We will use the second connector from the left. It is called the B Connector.

Module Red Wire — Car Connector B – #21 (WHITE/YELLOW)

Module Black Wire — Car Connector B – #2  (BLACK)

Module Orange Wire — Car Connector B – #14 (BLUE/BLACK)


2nd Group: this will be located in the passenger fuse box. We will use the green connector on top right of the Multiplex Control Unit. I marked the wires with the corresponding color from the module.

Module Green Wire — Orange Wire

Module Blue Wire — Black/Orange Wire

After this, it should lock whenever you shift out of Park and Neutral and unlock when you put it back to Park and Neutral. Enjoy!


Please let me know if you have any questions or comments.