It only whistle when i appied the brakes right to the end.It is not my brake pads or shoes.1999 dodge caravan.

Hi Alicia,how is your brake fluid?Usually just changing front brake shoes requires no bleeding since the brake line was not open,how were your brakes before you changed the pads,if fluid is low,maybe back wheel cylinders are leaking.Front calibers could be bad,or even master cylinder,need more info.

Warped front rotors. Replace rotors.

have you replaced the front and rear brake pads (for older vehicles, rear wheels use brake shoes instead of brake pads). if yes, check your calipers. completely remove it from your tire and have it cleaned.
if the problem still persists, then its time to replace your hydrovac

In this tutorial, we learn how to check the brake pads on a 2008 Dodge Caravan, check the thickness of the brake pads on the car to see if they are thick enough. The rear pad is surrounded by a gold piece called the "shoe" and the rotor. The front pad has to be inspected by laying on your back and looking for the pad to see how thick it is. If the thickness is not enough, you need to replace it as soon as possible. Make sure the brake pads are up to t

remove the road wheel and inspect your brake pads or shoes, possibly worn down to metal

Look through the rear wheel slots. If you can see a shinny round disk, you have disk brakes and pads. If you see a black metal drum, you have brake shoes,

hi 1st thing to check is the brake fluid level is topped up as the reservoir has a sensor fitted to cap so as brake pads/shoes wear the fluid is displaced from reservoir to compensate cylinders hence fluid level falls and puts light on as you brake ? also possibility is that your pads may be fitted with low brake pads warning indicators/wires which also puts same light on as you brake and goes off when you let off to accelerate ? check both of these possibilities if you req more help/advice by all means come back with info

Try this disconnect the brake booster vacume line plug it and drive. BE CAREFUL YOU HAVE NO POWER AST BRAKES!!!!! If the whistle goes away then you need a brake booster

sounds like brake wear indicator, time for brakes if so

For Disc Brakes...simply use a 7mm allen wrench to remove the 2 bolts from the inside of the caliper and use a large C-clamp to put pressure on the hydrolic piston. The two pads slide right off for replacement. Reverse directions to install new ones.

http://www.wonderhowto.com/how-to/video/how-to-change-the-rear-brake-shoes-on-a-dodge-caravan-162663/

Check the above link and get a video explanation for installation of installing rear brakes