Battery and Brake light on, fans stop

Brake light bulbs are illuminated within the rear combination light assemblies whenever the brake pedal is pressed. This happens because of the brake light switch (also known as the stop lamp switch) located above the brake pedal. Pressing the the brake pedal closes the internal contacts of the brake light switch which transfers power from the battery to the combination light assembly. For example, in a '94 Geo Tracker the STOP/HORN fuse (15A) supplies power to the brake switch via a green wire and then to the combination light assemblies via a green/white white wire whenever the brake switch contacts close. These are the only two wires for the brake switch. The combination light assemblies on the other hand have four wires; brake light input (green/white wire), tail light input (red/blue wire), turn signal input (green wire) and ground (black wire). If all of the brake lights are inoperative, chances are the brake switch has failed or the power-supply fuse has blown. This is because it is highly unlikely for all brake light bulbs to fail simultaneously (although not impossible). You can read more here: https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-light-switch

Go to auto zone and test alternator and battery

If all your fuses are good, start looking at your ignition switch. It's the one thing all those circuits have in common.

old post
left key to on, while doing service
turn the key off
battery installed backwards

You have a brake light switch attached to your brake pedal,may be loose or bad.Read what it says,if bad light will stay on,easy to replace,just disconnect electrical connector,then unscrew nut,then remove,the end piece clicks on and off,I have a 85 Nissan 720 truck,have replaced mine before years ago. Duralast Stoplight Switch JA413 Read 1 Reviews on Duralast JA413

Have peak above the brake peddle. You will find the brake light switch. The switch has popped up too far. Adjust the switch.

Yes, it could be. Or you can check your battery. And try adding brake fluid to your master cylinder. That sometimes will cause the brake light to come on. Or check your emergency brake. Hope this helps, James Booth.

The brake light fuse is one up from the bottom right side. I doubt it's the fuse, because the computer also needs that fuse to run the engine.

Other possible causes are the switch above the pedal and the wiring.

sounds like the alternator went. try to charge the battery any autopart store offers it free. the with a volt meter check the volts at the battery with the car running it should be at least 13.5

Check your starter.

Cheers.