I'm looking to do this mod... which is effectively putting in a switch to disconnect the ABS/TC/VSC harness by the master brake cylinder. Instead of splicing into that harness, it's possible to splice into the same wire under the dash, on the skid control unit... like the guy in the thread below did. Unfortunately the pictures are gone from his thread and I'm not sure how to find the correct wire on the skid control unit. Any help is much appreciated!
http://www.toyota-4runner.org/4th-gen-t4rs/147196-vsc-mod-awesome-even-2wd.html
http://www.toyota-4runner.org/4th-gen-t4rs/147196-vsc-mod-awesome-even-2wd.html