Usual disclaimer - if you attempt this mod you do so at your own risk, make sure the keys are not in the ignition. Pictures from a VX220 that is right-hand drive. Speedster/LHD will be different.
I will not go into too much detail here as there are better guides available that also detail how to install the switch inside the cabin area for easier access. Use the fabulous search function to find the guides
Locate the ABS control module above the front right wheel arch and unplug the wiring bundle. Pull the securing part of the plug to release it. It looks like an oversized scart lead/socket.
Separate the wrapping around the wiring loom and locate the 2 ABS feeds (they should be *yellow/white and *pink/white wrapped around each other) *=going from memory and the photo is not clear enough to tell for certain.
Cut one of the ABS wires (yellow in this case) and connect your switch. Bullet connectors were used here for speed. This switch is from Maplin and includes the On/Off plate.
Once connected, plug the ABS back in and test everything works.
1. ABS switch in ON position, turn ignition on, ABS should be fine - no lights on dash, turn ignition off
2. ABS switch in OFF position, turn ignition on, ABS should be disabled - ABS light on dash, turn ignition off
I moved the towing eye including the rubber grommet to the other side - there should be a hole already. I could have run longer wires to the switch and put the switch elsewhere but the the switch fits neatly into the hole left by the towing eye and the wires are kept short. However, access to the rear of the switch is tight with the brake servo in the way.
Tidy everything up and wrap the wires again. I used plenty of tape and cable ties to keep everything secure.
Edited by Ouchie, 03 April 2010 - 09:45 PM.