1994 volvo 940 turbo buld failure relay

bulb failure warning relay has failed.behind your front ashtray last relay on the left .round one change it try on ebay.

check the fuse .and all of the bulbs are working.if ok then change the brake switch.

change your bulb failure warning relay the round one behind your front ashtray last one on the left.

the BOO switch, (Brake On Off) located on or near the brake pedal

hi fisrt check youer brake light blubes
if ok check the brake switch

most likely your brake light. Also if no brake lights are out, volvo is notorious for putting the wrong bulbs in from the factory. If they work take them out, if they have an orange bottom inside the buld replace the bulbs. I used to be a volvo tech. I would replace both so you dont run into this problem again

my bulb light stays on i have replaced all the bulbs and fuses have replaced the brake switch now my top light come on when you switch the fog light switch on what else can be the problem

Sometimes the fuse looks good,but replace it anyway,that sensor in under your dash,its red and round.

brake fluid low, or brake pads need replacing.

u might have a wiring problem like a short in a harness,.hope this works