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Re: Bleeding brakes Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Mon, 11 Jun 2001 12:04:26 In Reply to: Bleeding brakes, Mike Haskell, Sun, 10 Jun 2001 07:43:18 Members do not see ads below this line. - Help Keep This Site Online - Signup |
You get BOTH the Brake Fluid and Anti-Lock lights if the ABS pressure is low. ABS pressure drives both the ABS AND provides Brake Boost.
You state that the ABS pump doesn't run at startup. This explains why the lights stay on AND you get no brake boost. There is a process for bleeding the system, but you need the ABS pump to do it. System Bled or not, the ABS pump should be running when you turn the car on and the pressure is low.
Since the pump runs when you jumper the relay, the pump is OK. When you say jumper the relay, do you mean jumper across the contacts, or provide 12 volts to the coil? If you jumper across the contacts and the pump runs, the problem could be the relay OR the system driving the relay on. If you apply power to the coil and the pump runs, then the relay is OK, and the problem lies in what's driving it.
First off, determine if the ABS pump relay is being energized. If not, find out why not. That relay gets its signal from a pressure switch on the accumulator - if the accumulator pressure is too low, the pump runs to pressurize the system. Work backwards through the system, from the relay back to what's driving it. You'll need a schematic for this. Once you get the ABS pump to run, Then and only then can you bleed the system. Get yourself the 9000 Haynes manual, or check back through past posts.
But once you get find out why the ABS pump relay isn't driving the pump, you'll probably be in very good shape.
Of course, one question would be why you replaced the ABS module. What was wrong before you replaced it? Is it hooked up correctly, and that's why you're not getting signal to the relay?
You are correct - one of the lines from the brake fluid reservoir provides fluid for the clutch cylinder.
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