2000 blazer. when hazards are on but not flashing, there are no brake lights (except center). when stalk is set for right turn but not blinking only left brake light works and vice versa

Or new hazzard switch dealer will tell you they dont exist well they do
simple diy
pair of needle nose pliers
pull old hazzard switch straight up it pulls straight out with little force
if plastic breaks dif in pull up the part is 15 at dealer
no need to buy anything else and dealer will try to sell you the whole steering component you dont need the whole component

lol sounds like my old truck most likely crossed wires

Hazards work only when lights are off. Left signal light stays lit on the dash and does not blink and is stuck on (lit up) when lights are lit. If I place hazards on while lights are on only right side flashes and whole dash lights flash too... I replaced the flasher relay and it still does not work. Suggestions anyone? Thanks!

you are describing a typical turn signal switch problem, all those systems run through this switch, its about a 110 dollar part

Try pushing the Hazard switch on the Column several times and see if it restores the connection. From what I understand about the Multifunction Turn switch is that some of the contacts share connections with the Hazard Button.

The contacts work on a type of derailer setup and when the contacts get dirty or wear, things stop working. Moving the Hazard switch resets the points and springs each time you go in and out of the Hazard setting.

If your brake light is working you know the wires to the light socket from the brake switch are okay. Probably would not hurt to check brake light switch as it shares the common wire. The split between the left turn and right turn signal wire has to occur, yet the opposite brake light will stay on steady while the other side blinks.

either the hazard switch needs changing or the indicator stalk switch is broke or you have a disconnected wire to the indicator switch

the right rear is burnt out so a new bulb will fix it

We bought a 2000 Blazer in '02 and one day I noticed there were no brake lights, but the 3rd light on top worked fine. I did some research online and found out there was a recall on this problem due to the hazard switch on the column. I also found out if I wiggled the hazard switch a certain way, the brake lights worked. I was able to get by for awhile by wedging a 'widget' beside the hazard switch button and the hole in the column cover. This worked fine until someone would knock the widget out of place.
I finally got around to having the switch replaced at a local dealer. All was fine until last week when I was told the brake lights were out again and I found out my hazard lights didn't work either. I changed out the switch assembly myself this time, and once I had it out I saw what happened. The brake light voltage comes in to the assembly on a white wire, and the first contact this goes through is on the hazard switch. In my case the contact had obviously overheated from the brake light current and melted the plastic holding the contact in place, thus breaking the circuit to the brakes. Either a poor design or too much current for the circuit to handle.
Soooooo now I am in the process of replacing the four bulbs in the tail/brake light assembly with 3 watt Luxeon LED plug-in replacements. The current draw of the original bulbs was measured at 2.2 amps at 13.8 volts, times 4 bulbs makes about 8.8 amps that goes through the contact in the hazard switch whenever the brakes are stomped. The LED replacements draw .2 amp each, so times 4 will be .8 amp or less than 1/10th of the original equipment bulbs. These LED bulbs in my opinion are as bright or brighter than the original equipment and hopefully will help from burning out another switch assembly.. David

The hazard light switch contacts burnt up on my blazer. Try wiggling the hazard switch around as you have your foot on the brake to see it tahat's your problem.