Nothing works on dash board no lights or rpm speed odometer

transmission control selonoid

check fuses and wiring harness from ignition switch

so the only thing not working is the fuel gauge? the odometer , speedometer , and rpm gauge work, but dont light up? if so, does the radio or any other lights illuminate? check your dimmer switch for these issues. please let me know a little more information

YES the speed sensor is first to check, but dont just go buy one and put it in. does the odometer work? if so, its getting a signal. The insrument clusters are common to fail, ususally a cracked solder joint in the circuit board. it will need to be removed and resoldered. if the odometer does not work, then check and verify that the spped sensor is indeed not putting any signal to the dash.

My gas guage, speed odometer and tempiture does not work
The speed odometre is reading 9999999 what should i do

Have the computer checked

it sounds like your reistate that controls the brightness of the dash lights. try moving the knob back and forth .

I had the same problem some time ago, lights would go on and off, odometer appeared to stop counting at times rpm gauge would work and then not... power steering would off and on work and head lights would blink on and off when in driving light mode (off position).. The fix for me was I had to have the dash computer replaced (about $500). After doing this around 50k miles ago all the gremlins seem to have remained gone.. Hope this helps

if the engine is running fine and no limp mode no engine lights. abs is working then the only other thing could be the dash may need replacing as putting the battery on wrong can blow the electronics in the dash as they are both linked. i ask is there any other problems as the rev counter work to ecu in line with speedo and the abs unit to determine timing etc. speedo works of the abs system the connection between them both is the board in the dash board. you can replace the boards in the dash but you will need replacement dash parts to do this but remember if you change the dash you need to log the miles as new dash will have different miles and uk mot log your miles to dvla. USA i dont know you would need to look into this.

i own a 1991 chevy blazer myself but my problem is opposet of yours my back lights stay on well i went underneath the dash board an i look up underneath my steering column an i saw to components one was to my cruise control an the one in back of it was to my back lights an i moved this around an to my surprise my light swork good now but now my speed odometer doesnt not work an my gas gauge am my oil aa water gauge my power windows dont work an niether my a/c or heater defroster im jus wondering if i need to move this component alittke more to the left or right yesterday everything worked hmmmm