Question about 1998 Mercury Sable

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My brake controle module stop working and think my master cylinde

My brake controle module stop working .so i replased it with one from the juck yard but still did not work so i got another one and it also did not work . so i got anotherone and no luck. im thinking something is causing my abs not to work properly. please help me i really dont have the mony to take it to a shop

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  • yadayada
    yadayada May 11, 2010

    I am sorry but the shop is in your future, and only a Ford or Merc shop will do, they are the only ones that have the electronic test equipment to get to the bottom of your issue, have you tested the system for codes?

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Actually depending on the OBD, you might get lucky and they will loan you a diagnostics tool at Advanced or Autozone, but then again you may have no choice but to go to the dealer, or someone who has the tool, brakes are nothing to fool around with if you have any doubt get it checked before you get into a serious accident!

Hope this helps

Posted on Dec 06, 2008

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2 Answers

What is a abs modular on a Escalade Cadillac?


Jesse, The module will not stop fluid to rear brakes, a bad master cylinder will,leaking lines, air in brake system, faulty metering block if equipped, collapsed flex lines or pinched brake line faulty caliper or brake cylinders,etc. will cause the possible feeling of no rear brakes.
(ABS Module components) the ABS speed sensors and the ABS control module . When the brake is applied, the ABS control module reads the speed data from the speed sensor and sends the correct pressure to each wheel to prevent any wheel lock up, eg. sliding/skidding Links below have more info.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Service Stability System AND abs Pump issue

ABS Control Module Replacement Service Cost YourMechanic

https://www.rockauto.com/en/catalog/cadillac,2002,escalade,5.3l+v8,1431695,brake/wheel+hub,abs+control+module,1844

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1 Answer

97 siverado brake pedal goes to floor and theres no air in line no leak new master went motor its not running brakes feel ok as soon as i start engine pedal goes down


Does your truck have ABS? If so you may have a bad brake
pressure modulator for the abs. Its the big box by the Master that says Kelsey-Hayes on it. You can pick up the complete unit from a salvage yard at a pretty reasonable price.

I also found this on another site. I know you said that you blead the Master but check this information out. The bleeding of a new Master Cylinder is very important to get it exactly right.
http://www.ehow.com/how_4508156_bench-bleed-master-cylinder-chevy.html

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I replaced the brake master cylinder on my 91 Lincoln Mark 7 with a non high pressure master cylinder and the rear brakes do not hold. Do I need to change the cal. on the rear also?


ANTI-LOCK BRAKE SYSTEM (and HCU-Hydraulic Control Unit)
General Information The 4-Wheel Anti-lock Brake System (ABS) is an electronically operated, all wheel brake control system. Major components include the power brake booster, master cylinder, the wheel speed sensors, and the Hydraulic Control Unit (HCU) which contains the control module, a relay, and the pressure control valves. The system is designed to ****** wheel lockup during periods of high wheel slip when braking. Retarding wheel lockup is accomplished by modulating fluid pressure to the wheel brake units. When the control module detects a variation in voltage across the wheel speed sensors, the ABS is activated. The control module opens and closes various valves located inside the HCU. These valves, called dump and isolation valves, modulate the hydraulic pressure to the wheels by applying and venting the pressure to the brake fluid circuits. Some models are equipped with a Traction Assist (TA) system. The TA system senses wheel spin upon acceleration, turns on the Hydraulic Control Unit (HCU) pump and applies fluid pressure to the appropriate rear wheel. Two additional isolation valves in the HCU will also close to permit fluid to flow only to the rear wheels. The TA system monitors TA usage to avoid overheating the rear brakes. If the system does sense brake overheating, the ABS module will inhibit TA operation until the rear brakes are permitted to cool down.
---
SYSTEM COMPONENTS The anti-lock brake system consists of the following components:
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On 1992-1994 and 1995-00 a scanner is used to perform the brake bleed. But on yours, I think it's different according to the manual.
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What do you mean change the cal. on the rear also? Do you mean Caliper?

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My windshield wipers will stop working and when you turn them on, there will be a buzzing noise somewhere under the dash or in front of the firewall


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1 Answer

2004 Chevy Surburban. The driver side mirror will not work using the switch on the door. Also the auto lock has stopped working. I think I have to remove the inside door panel to check the wiring.


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