Get a scan tool so you can read the DTCs associated with the ABS light. The Forscan Lite app works well (about $10). You will also need a cheap elm 327 adapter w/bluetooth ( about $30, many work for the simple scanner functions, more expensive ones needed for programming changes). Do a YouTube search for info.
Now you have a tool you can use for almost every repair on your TC. You will no longer have to buy a bunch of electrical parts to find out which one is bad. If you do all your own maintenance and troubleshooting you will use the scan tool many times.