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Old 04-15-2003, 07:22 PM
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Shiner, look closely at your proportioning valve. Some of the early ones had a little button that needed to be manually depressed to center up the valve in the valve body. As previously mentioned, if the pressure differential function of the prop. valve sees zero pressure on one side and pressure on the other it will shift, closing the zero pressure side to stop any inadvertant fluid loss. If this is the case, it will need to be manually centered back up with the button (if you have one.) If possible, have someone depress the button while you bleed the rear brakes. If you dont see one, you will need to crack open the front again to try and center the valve back up.

Once you get them bled, if the brake lite stays on, you'll need to center up the valve by bleading off pressure to either the front or the rear, depending on which side the valve has shifted to. Usually the diff. valve centers itself once all the air has been purged from the system but sometimes not.

Have fun...
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