Upon coming to a complete stop in my 2003 Disco II a few days ago, all four brake warning lights came on:





I made my stop, restarted the Disco, and the lights did not come back on again....phew. Drive for a few more miles, come to a stop, all four lights came on again.....and they've stayed on.

What does this mean?

 

you'll need a code reader that can read Land Rover ABS codes to know specifically why the lights are all on.

but if I had to guess you may have worn brake pads, or a ABS sensor that is loose, or a caliper that is loose and moving while braking that is triggering the codes, or maybe even a piece of gravel or debris caught up in the caliper and/or brake pads that is causing an issue when you brake to a stop.

that being said, best bet is to have the codes read, find out which wheel is causing the issue, pull the wheel off and examine the brake caliper, disc, pads, and ABS sensor.

 

The above is correct, it sounds electical to me. I would pull the plugs out of the abs unit, clean them and see where you are. My bet would be the wiring is causing the three amigo, the fourth is probably a worn brake or senosr connection. I have an ABS Amgio if youil like to borrow it. just PM your address and I willl send it out.

 

The red BRAKE light indicates that the parking brake is applied or the brake fluid is low. If the fluid is low it's best to top it up before any air gets in the system. It's either low because of a leak or worn pads combined with worn rotors. The further the calipers have to push the pads due to worn components, the lower the fluid will be in the reservoir. If the pads / rotors are worn, pay attention to the master cylinder when you replace them because any extra fluid you add will want to come back out. If you don't add any extra fluid before changing all the brakes, the fluid should return to the normal level, but it's still good to check afterwards.

The other lights are the three amigos. I recommend researching them.

 

The brake light can also light as part of the four amigos; it's not solely related to parking brake or low fluid.

As said above, reading the codes is the only way to track down what is causing the situation.

 

According to the table in the RAVE, the BRAKE warning light illuminates in all conditions where the Three Amigos appear. It appearing with the Three Amigos provides no additional information.

Get the ABS codes read and proceed from there. Otherwise you are just guessing and throwing money and time at it. And BTW, if there's a code indicating an ABS sensor fault don't jump right into replacing the sensor or the hub. ABS sensor faults are often caused by problems with the electrical connectors, either where the sensor plugs into the harness or even where the connector plugs into the SLABS.

Get the codes read and let us know what you find.