I have a 97 Tahoe and the brake lights were not working and the problem was in the emergency flasher switch. I just jiggled it and the brake lights worked so am thinking you might have the same problem. It could also be the brake pedal switch located right on the pedal arm.
If your furnace control board has no lights, first check the power supply and circuit breaker. If those are fine, it may indicate a faulty control board that needs to be replaced by a professional technician.
Determine which circuit is involved and then troubleshoot that circuit You should take your truck to Autozone and have them check the charge on your alternator, they do this for free.
Panel lights and parking/tail lights should be on 1 circuit Brake lights should be on a separate circuit If you are sure fuses are good- Check bulbs Check headlight switch Check stoplight switch
Check the fuses. Parking lights/tailights/dash lights should be a common circuit Check the fuses. Parking lights/tailights/dash lights should be a common circuit I had the same problum last year and had to replace the wires.
If some lights are not working in your house, first check if the light bulbs need to be replaced. If the bulbs are fine, then check the circuit breaker to see if a switch has been tripped. If the issue persists, it may be a wiring problem and you should contact a qualified electrician for assistance.
If a car's lights are not working properly, the fuses should be replaced. The light bulbs should also be replaced if needed.
Should be the same circuit for parking/tail/dash lights
To troubleshoot electrical outlets in your home, start by checking if the outlet is receiving power by testing it with a voltage tester. If there is no power, check the circuit breaker or fuse box to see if a switch needs to be reset or a fuse replaced. If the outlet still doesn't work, it may be a wiring issue and you should consider calling a licensed electrician for further inspection and repairs.
Should be parking/tail/dash lights on a common circuit
If the night running lights have failed the bulbs should be checked. Find the bulb housings and remove the parts. After the bulbs are replaced check the lights.
The oxygen sensor is "done". It should be replaced.
If you have replaced the brake light bulbs lately check that you used the correct bulb. Some rear bulbs should be the 2 filament type and if a 1 filament bulb is used the lighting circuit shorts causing odd behavior.