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Afternoon...

This question is for my 99 GT 35th Anniversary Mustang, not the 69 Mach1. I just don’t have anywhere else to ask, sorry.

Over the weekend tried to replace my brakes, and of course something has gone wrong! I took the calipers off and disconnected the brake line on both sides of the car, turned the rotors, installed the new brakes, and hooked the calipers back up.

However, I cannot re-pressurize the brake system no matter how much I bleed the system. When I took the calipers off I used a c-clamp to push back the pistons just as I have on other cars.

I have tried bleeding all four brakes, and yet nothing. The rear brakes are still functioning correctly, but I am at wits end.

Can anyone help?
 

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I don't expect you've done any damage to the calipers, but the ABS may be another story. I don't know this brake system, but I do know that there are ABS units that can be damaged by pushing the fluid backwards.

I'd suggest that you get a manual and see what the right way is to do this procedure on the '99.

Good luck,
 
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