Uhm...on ABS equipped vehicles, activating the brake monitor light bypassing
the emergency brake switch will disable the ABS system. Bad idea!!!
| > > > Is there any way to install a switch so the headlights can be turned
| > > on
| > > > a 2001 Chevy Tracker?
| > > > thanks, Tim fm CT
| > >
| > > This may sound stupid, but with my '91 Bonnie, my Grandparent's '97
| > > Lumina, and (IIRC) my Sister's '04 Grand Am, applying the emergency
| > > turns off all auto-light / DRL's...At least while the car is in
| > > a thought.
| > >
| > > --
| > > 80Knight
| > > --1991 Pontiac Bonneville SSE Sedan
| > > --3800 V6
| > > --190,000 KM's
| > > Bonnie's Website's:
| > > http://www.geocities.com/brandon_80_knight /
Cool! I just looked at this group for the first time and had two
questions, one of them was "how do I disable the ABS?" My ABS not only
sucks on a rough road, but down a little hill with some loose gravel.
The SOB brakes pulse away and the &*#@^$ G3500 van keeps going. I can't
wait for rain so I can really test it out.
same here, stopping on a straight level dry road and hit a little crack and
one wheel bounces a tiny bit and the ABS kicks in and the whole truck jumps
forward as if it didn't have any brakes. I can't believe this James guy
thinks disabeling ABS is a bad idea, he must be one of those that thinks
ABS helps people stop! (you would be surprised at how many people think
that and don't understand how ABS works and what it is intended for)
Not that I am recommending it.... But "normally" if there isn't
feedback from one of the ABS sensors the ABS portion of your braking
system shuts off & reverts to traditional braking. Your ABS light
will come on if it isn't working, "say, if a sensor was unplugged."
again, not that I'm recommending it.
Just what is ABS intended for anyway? I tried (in a large empty parking
lot in the rain) locking up the brakes while turning. I would think the
*wonderful invention* called ABS would allow my front wheels to rotate
enough to make the vehicle turn instead of skidding straight. No, it
didn't turn. The ABS pulsed away like mad and I still skidded straight
Because as another fellow pointed out, there is such a thing as rear
wheel only ABS. That coupled with the fact that you lost steering
ability. Like him, I thought maybe you had the goofy set up.
ABS help people stop quicker (or in shorter distance). There are
exceptions to this. Like gravel as stated. Over all though, ABS will
yield superior results with average drivers. Drivers who keep their
cool under extreme stress and are adept at avoiding lock-up, are
better served by non ABS brakes.
Only you know if you are Mr. Mario or not, but don't over estimate
Ahh, heres the mtyh. ABS wasn't designed to help stop quicker and the laws
of physics don't allow it to help people stop quicker.
ABS simply releases the pressure on the lines when a wheel locks up, this is
to allow controlled steering because a locked up wheel will slide in the
direction it was going, it has to be rotating to turn directions. This
releasing of the brake is what extends the stopping distance. True
threashold braking is the fastest way to stop but you have to have a feel
for it, too much pressure you lock the wheels and too little pressure you
don't stop as effectively ABS pulses the brakes so it bounces above and
below the threashold line a few times a second but since its slightly above
or below the threashold line most of the time it doesn't give the
best/shortest stopping distance. If you have ever studied and
electronic/mechanical engineering you would understand how a control system
like this works but plotting on a graph the change in brake pressure you
get a damped sine wave
I certainly understand. What makes it worse yet is that in my test
skids in a wet parking lot, the abs didn't even help me turn! I still
skidded straight! (same in snow also BTW) I didn't do any test skids
on a dry surface.
Reminds me of being 18 and running from the cops. I was on a stone road
and around a corner they just added a lot of new stone that was very
loose. I knew the road and wasn't expecting the new loose stone. I
locked up the brakes, skidding straight for a tree... with a dog tied to
it... skidding closer and closer. At the last second I let off the
brakes just in time to make the turn.
ABS is an attempt to help people drive... without having the slightest
knowledge in basic 5th grade science.
I think that myth started because people would buy newer cars with better
brakes and ABS so the better stopping ability they attributed to ABS. I've
even heard car salesman make the claim that "ABS stops better", but the
average car salesman can't tell a 4cly from a 6cyl engine. I always have
fun opening the hood and asking questions.
Are you sure your van has 4 wheel ABS? Sounds like it has rear-wheel
ABS, which is the most illogical way to do it. You want the front
wheels spinning at the least in order to make the turn, but keeping
the rears going helps A LOT also...
No. Did I give that impression? I don't think it has ABS in the rear
wheels. Hold on, I actually checked the manual, it _says_ it has 4
wheel anti lock brakes... but I don't believe it. Hold on again...
(brushing the dirt off my back) looking at the front brakes I see the
hydraulic line and the sensor wire. Looking at the rear I see the
hydraulic line and the emergency/parking brake cable... no sensor wires.
I believe the manual is wrong. Only front wheel anti-lock, which is
what I always thought by the *feel* of the braking.
Sounds like it has rear-wheel
I fully understand how ABS *should* help me turn instead of a fully
locked up wheel, but in real life, it doesn't do what is intended to do.
Maybe it would on a dry road? Like I said, I never did a test skid on
a dry road, only in rain or snow.
If it's got front wheel sensors it's a 4 wheel ABS vehicle. I think
the rear is sensed through the VSS, since the driveshaft stops turning
when the rear wheels do. My 94 Jimmy was, and my 2000 S-10 is, 4
wheel ABS, neither has sensors in the rear.
I never heard the rear brakes pulsing in any emergency braking
situation. Yes, this is a cargo van and the noise of the ABS is very
loud and unmistakable. I can feel (and hear) the front ABS switching
from left to right wheel by the pull in the steering.
Back to the parking brake disabling the ABS, I have locked up the rear
wheels using a combo of normal braking and the emergency brake. The ABS
does not kick in. So the question goes back to "does the parking brake
disable (the rear) ABS? Or doesn't my van have rear ABS?
Maybe the rear brakes simply never get enough braking action to lock
them up? At 50K miles they look hardly used, 3rd set on the front
(although I may have helped/fixed that problem). On my long gone 1987?
GMC Safari (chevy astro van), the rear brakes lasted over 100,000 miles
and where only replaced after a leak in the axle bearing seal. On that
van if stuck in the snow, it would sometimes spin one of the rear wheels
at idle, with the brakes engaged. On a lift, in drive, at idle, I had
to fully depress the brake peddle to stop the rear wheels. Chevy said
this is OK. So with the pedal half way depressed, the rear wheels where
still pushing the van instead of stoping it. That sounds like the rear
is getting maybe 1% of the braking instead of 20%.
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