Be careful about which websites you accept as gospel. That one has some serious mistakes that the author refuses to correct.

If you really want to take a giant leap backwards by refusing to use the brake light discriminator circuit, just isolate the wire that would normally be connected to the brake light switch and wire the dedicated turn signals at each corner of the vehicle individually. It would be a much simpler (and more professional) option to wire the auxiliary lights as designed, which uses the turn signal on one side as a brake light and flashes the one indicating which way you intend to turn. The 7-wire system also has an emergency flash option which I believe the 4-wire system might not have.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!