Car moves when handbrake applied,rear disc brakes.

Most Proton Gen2 cars have disc brakes on their rear wheels. These disc brake pads are shared with the handbrake. The handbrake, as with the "regular" brake on these rear wheels, are self-adjusting.

may have a seized hand brake cable

I familiar with this setup, but the car should start with the parking brake on. I could see it warning you if you try to move it with brake set, or maybe even shutting off engine then, but I would never think it would prevent engine from starting. Is this a stick shift or automatic. Make sure transmission is in neutral or park, clutch depressed.

• Adjustments

1. Apply service brake pedal three times with a force of approximately 175 lbs.



2. Fully apply and release parking brake three times. Full application may require two pedal strokes.



3. Raise and support vehicle, then mark relationship between wheel and axle flange.



4. Check parking brake pedal assembly for full release as follows:

1. Turn ignition switch to On position.



2. If ``Brake\'\' lamp is illuminated, operate manual brake release and pull downward on front parking brake cable to remove slack from pedal assembly.

1. Remove rear wheel and tire assemblies, then install two lug nuts to retain each rotor assembly.



2. If two parking brake levers on both calipers are not against lever stops on caliper housings, check for binding in rear cables and/or loosen cables at adjuster until both left and right levers are against their stops.



3. Tighten parking brake cable at adjuster until either the left or right lever begins to move off the stop, then loosen adjustment until lever moves back barely touching stop.



4. Operate parking brake several times to check adjustments. A firm pedal feel should be obtained by pumping pedal two full strokes and rear wheels should not rotate forward when parking brake is fully applied.



5. Install wheel and tire assemblies, aligning marks made in step 3.

handbrake wont hold due to incorrect adjustment method .
Under handbrake lever cover there is a thread rod with a 10mm nut on it undo it until the nut is level the top of the rod.
2.remove rear wheels
3.remove brake capliers and brackets
4.remove rear disc rotors.
5.get some sand paper and clean handbrake shoes and inside of disc rotors.
6.use a and adjusting tool and adjust the handbrake mechanism until you can feel drag on the rortor.
7.refit brake brackets and capliers
8.refit wheels
9.lower vehicle
10.now the vehicle is on the ground at the hbrake lever use a 10mm socket to adjust rod.
11.adjust the lever so its 7clicks .
12.on lever ground place the vehicle in drive apply hbrake 7clicks and it should hold vehicle..

Have you tried applying foot brake before releasing park brake. You will need a good battery to release the brake with ignition on. Also you need to depress footbrake to move shift lever from PARK

What is happening is that your handbrake shoes are rusting onto the inside of of your brake drum ( inside the rear disks)
As the park brake is separate from your rear disks it doesn't get used ( cleaned ) during normal driving.
You could try gently applying your handbrake whilst moving to see if it will polish the brake linings and stop them siezing

This condition indicates warped rotors. You will need to remove the rotors and have them turned on a brake laythe. Since you will have the calipers off, go ahead and replace the pads...its an inexpensive maintennance item. Good Luck, Hope this is helpful.

There are no handbrake shoes on the rear. There's one set that operates when you apply the brake pedal and when you apply the handbrake. One set of shoes to handle two functions.

i recently had 4 tyres fittede and tyre company had crossed threaded one stud so forcing brake disc to be loose, hence when handbrake applied got thump from brake area.