Quote:
Originally Posted by rmwilson
Its a 2000 ENVOY - build on blazer/jimmy platform: (not sure if it has any special systems as a result)
I replaced (spliced) a section of brake line that had rotted out left rear wheel. (symptom was brake light came on, brakes would feel soft and ABS would kick in at the very last few feet of a stop - started to bleed brakes and saw fluid pouring out rear line) -
The pedal is very soft, no pressure and it won't bleed no fluid coming out of left rear caliper where i worked. Wondering if I have air in the abs system - Brake pressure modulator valve? (Bleed EHCU/BPMV module) - do I absolutely need a scanner to open any closed valves? Are there any hand held personal scanners from automotive stores I can buy that will cycle abs unit (solenoids) any manual way of doing it - i.e disconnect battery, pull fuses, turn key on and off and do a dance????? ?
Any tips or advice on how to get air out of system?
Ryan
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Make sure you have all lines fixed good.
First step on bleeding is to beed the lines out of master cylinder.
Always wait 30 seconds when you let up on brake pedal.
Start at right rear wheel.
If fluid fails to come out either rear wheel.
Go to combination valve and make sure it is not tripped.
If tripped some times you can open the wheel on front or other line on other side and get the valve to center.
They make holders for combination valve to keep them from tripping and shutting off a wheel.
When bleeding calipers tap side some to help traped ait get out.
The good book says you need a abs capable scanner to bleed the abs part of brakes.
But.
Some times on ABS brakes you can turn key on to help bleed abs unit.
Good ABS scanners with the built in brake bleed are not cheap.
Some are from 3 - 5 grand $$$$$$$$.