the blinker switch shorted out the brake lights... really really common problem,
need to replace the switch
I don't know why exactly, but I do know is that by pulling just slightly on the high beam/cruise control/turning signal lever and you press on the breaks, the lights kick in.
I have the same problem- press on the brake, no brake lights. Press on the brake and pull back on turn signal/high beams lever, brake lights turn on! Jiggle the lever, brake lights turn on, but left turn signal does not work. I have replaced the switch that is down near the brake pedal and that is not the problem. I think you may need to replace the whole turn signal/high beams/cruise control switch....or at least that's what I'm going to try.
Most likely it is either the brake light switch, under the dashboard, connected to the brake pedal or the turn signal switch inside the steering column.
Check all fuses. Wait until dark. Park where you could see the glow of the brake lights from inside the truck, were they to illuminate. Press and hold the brake pedal. Wiggle the turn signal switch about for a few seconds. If this causes the brake lights to work or to flicker, replace turn signal switch. Move tilt steering up and down. If this causes the brake lights to work or to flicker, replace turn signal switch. Switch 4-way flash hazard lights on and off a few times. See if that does anything interesting. Check for Body codes.
My mechanic had to change a switch inside the steering column. Brake lights worked when turn signal was on. Have a mechanic check that.
mabie they could be burning out.
usually faulty brake lights are either the brake light switch that senses when you press on the brake pedal, a connector somewhere between the brake light switch and the brake lights or the turn signal switch.
you probally need to replace the bulbs
Kind of vague on the question. If all other rear lights work....tail and turn signals, I'd say it's the brake light switch. You'll find it mounted under the dash, just behind the brake pedal. As you press the brake the switch "opens" to send the signal to the brake lights. These replacement switches are really inexpensive and available at any parts store.
press to release. says so right on the pedal.
just as the name it makes the brake lights come on when u press on the brake pedal
Check for a loose fuse, check your wiring, check the connections, sounds like something is loose. Also make note as to when it turn off, are pressing the brake? using the turn signal? I had a firebird that every time I press the brake the signal lights would turn on and the radio would turned off, that turned out to be I used the wrong bulb in my brake lights