ABS engaging at inappropriate times

[White93z34]

recently my ABS has been picking the worst of times to work, generally when i am pulling into my driveway at slow speeds with the wheels turned it will engage when there is absolutely no reason for it to, and the system will completely die if say i hit a bigger bump with the wheels tuned. as of right now i just have the fuse pulled, but i would love to know why it is doing this, i'm sorta thinking a wheel speed sensor. does anyone know how to properly diagnose this?

[slick]

My Z34 was doing close to exactly the same thing. Most likely the WSS. Have you tried uplugging the sensors, cleaning out the contacts, and putting them back together?

[White93z34]

not yet, it has just hapiened in the past few days, i have a broken wheel stud to replace on the front so i'll check the one out when i am down there.

[slick]

Definately do it. It'll take a matter of 5 minutes, if that. I know when I pulled one of mine off, it was filled with sand and water from years of driving. I never did fix the ABS problem(most likely was the WSS with mine).

[Crazy K]

thats gotta be it Chrises!

[RJansen658]

Well, first I'd clean all the wheel speed tone rings, if it persists, the only real way to diagnose it is with a scan tool. The snap on scanners are capable of it. Monitor and graph all the wheel speed sensors while driving under the conditions that cause the problem, then one the problem is encountered, stop the graphing, and look at you graphs together. One of the sensors should drop off or spike, thats your bad sensor/tone ring/wiring. The front ABS harnesses on the W's go bad. The harness connects at the wheel speed sensor then goes thru the fenderwell and connects into the main harness just inside. The connector is behind the firewall insulator on each side.

[White93z34]

thanks alot! i'll have to find someone with a scantool that i can make use of!