1996 850R intermittent brake pulsation over bumps

wackenhut · Post by **wackenhut** » 13 Jun 2019, 07:48

I have noticed in the last few days that at least one time per driving, the brake pulsates (seems like abs is kicking in) when going over bumps. This has never occurred before. Does anyone have any idea what could be causing this. There are no codes coming up. Any help is much appreciated.

Thank you.

Post by **bmdubya1198** » 13 Jun 2019, 08:33

My '98 has done that too. How do your brakes perform otherwise? I always associated it with pads that are too hard, and don't seem to grab very well.
Otherwise, it would be a good idea to check your brake fluid to make sure it's at the proper level.

Post by **abscate** » 13 Jun 2019, 08:55

If the wheels are losing traction on a bump, the traction controls (TRACS or STC) uses ABS to control wheel spin - that might be it.

wackenhut · Post by **wackenhut** » 13 Jun 2019, 09:07

Just strange that all the sudden this started happening

WhatAmIDoing · Post by **WhatAmIDoing** » 13 Jun 2019, 20:28

It is more likely for your wheels to lock up when braking on a rough surface, because there is more rolling resistance. I know on my last trip through PA, every braking event set off ABS because the roads are nothing but potholes.

tardcart · Post by **tardcart** » 13 Jun 2019, 20:35

start by turning tracks off, also may be the insulation is gone on the pump wires and they are arcing.

wackenhut · Post by **wackenhut** » 14 Jun 2019, 17:37

I just noticed now, that the TRACS OFF Light is permanently illuminated. Does this help any in the diagnosis of the issue?

Thank you

Post by **bmdubya1198** » 14 Jun 2019, 20:47

Nothing changes when you hit the TRACS button? That could be indicative of a failing ABS module, or other ABS/TRACS issues. You can't get flash codes on a '96, right? You probably need Vol-FCR or 850-OBD2 on Android to read ABS codes.