Both turnsignal lights on dash come on when braking

I am just guessing at this one but you might want to check the headlight switch that turns on the headlights. Sounds like you changed just about everything else. The turn signals I believe are on a separate circuit from the brake lights. In addition you might want to check for a broken wire to turn signal harness

replace brake light switch @ BRAKE PEDAL, next, replace turnsignal flasher under dash, check for blown fuse, if turn sig. still doesn't work, check turnsig., switch, & or for loose connection.

With the exception of the dash light, everything else runs thru the turnsignal switch. I would start there.

if your fuse is good. and you have power at the brake light switch and when you hit the brakes you have power coming out the otherside of brake light switch/which would be the white wire/ check that the white wire is sending power up the turn signal switch. if theres power there and your turnsignals work? im afraid that your turnsignal switch is bad rare but it has been known to happen.

Can't promise anything but check the earth connections on the rear light clusters.

flasher relay is bad
or bad bulb

do an electrical check of all wiring to all the lights, you are describing the symptoms of a bad ground , bu i don,t have enough info to gues if its front or rear,

Remove the dash.Behind it you will see the the bulbs check them.And allso check and clean the electrical plugs behind the dash.

brake light switch is connected to brake pedel under dash

all my gauges quit working and my turnsignals checked all my fuses under the hood and dash whats my problem?