Jordan 2000-2020 users, need advice
Been away for quite a while. Thanks in advance for your time. Having used my Jordan for over 10 years (and COMPLETELY satisfied with it), I'm starting to have an issue with it. I've just bought a n...
Forum Discussion
Oh, the why of the jerking when braking while towing a trailer
It has to do with the TV's braking leading the trailer's brakes
There is slop in any coupler and is supposed to be there in order to move the
ball away from the front dome portion of the coupler
Towing will have the ball move forward, into that dome and that dome has a lower
hemisphere to capture the ball when the ball unweights during a whop-do AND the
latch assembly moves in a metal pawl to form a rear lower hemisphere
When the latch is opened, that pawl is withdrawn and as the ball is moved BACK
out of the front dome, it no longer has any lower hemisphere to keep it
When the TV's braking leads the trailers, the ball moves back and against that latch
pawl
When the trailers brakes finally kick in, the ball is now slammed into the
front of the coupler dome to become that 'bang' and 'jerk'
Since my P3 is told to initiate the trailer brakes BEFORE the MC ever develops
PSI, the trailer brakes 'LEAD' my Suburban's brakes...so the ball never leaves
contact with the front portion of the coupler dome
A case can be made that if I pressed the brake pedal hard/fast enough,
the TV brakes 'may' lead the trailer brakes...yes, if the hysteresis
of the trailer braking system is longer than the TV's braking system
but to date, have not experienced that...even after too many 'have to
slam on the brake' sessions with the trailers I've towed
Folks who marvel at the MC PSI sensed miss that and that they also
have a bit sooner lead, but not as much as my GM brake switch sensed
or those with a plunger type brake switch (they are later in the game,
as they can NOT be adjusted as tight as the GM switch...or that I've
come across...any have the switch spec on the other OEM's?)
By the time my Suburban's MC develops PSI, the trailer has already been braking
to then sense the inertia sensor's input that 'hey, there is deceleration' and
goes into the preset braking metrics
This is a ditto with MC PSI sensed, but again not as much lead as
my P3.
Albeit milli seconds (dependent on how fast/hard the pedal is
pushed...I can dwell and NOT go into pushing the MC piston rod, so
all trailer brakes and no TV brakes), but never the less, mine leads any MC PSI
sensed, unless they also employ a brake pedal switch that initiates
as soon as the GM brake switch
It has to do with the TV's braking leading the trailer's brakes
There is slop in any coupler and is supposed to be there in order to move the
ball away from the front dome portion of the coupler
Towing will have the ball move forward, into that dome and that dome has a lower
hemisphere to capture the ball when the ball unweights during a whop-do AND the
latch assembly moves in a metal pawl to form a rear lower hemisphere
When the latch is opened, that pawl is withdrawn and as the ball is moved BACK
out of the front dome, it no longer has any lower hemisphere to keep it
When the TV's braking leads the trailers, the ball moves back and against that latch
pawl
When the trailers brakes finally kick in, the ball is now slammed into the
front of the coupler dome to become that 'bang' and 'jerk'
Since my P3 is told to initiate the trailer brakes BEFORE the MC ever develops
PSI, the trailer brakes 'LEAD' my Suburban's brakes...so the ball never leaves
contact with the front portion of the coupler dome
A case can be made that if I pressed the brake pedal hard/fast enough,
the TV brakes 'may' lead the trailer brakes...yes, if the hysteresis
of the trailer braking system is longer than the TV's braking system
but to date, have not experienced that...even after too many 'have to
slam on the brake' sessions with the trailers I've towed
Folks who marvel at the MC PSI sensed miss that and that they also
have a bit sooner lead, but not as much as my GM brake switch sensed
or those with a plunger type brake switch (they are later in the game,
as they can NOT be adjusted as tight as the GM switch...or that I've
come across...any have the switch spec on the other OEM's?)
By the time my Suburban's MC develops PSI, the trailer has already been braking
to then sense the inertia sensor's input that 'hey, there is deceleration' and
goes into the preset braking metrics
This is a ditto with MC PSI sensed, but again not as much lead as
my P3.
Albeit milli seconds (dependent on how fast/hard the pedal is
pushed...I can dwell and NOT go into pushing the MC piston rod, so
all trailer brakes and no TV brakes), but never the less, mine leads any MC PSI
sensed, unless they also employ a brake pedal switch that initiates
as soon as the GM brake switch
