first look at your fuse box in the engine, it is located on the drivers side. there are 2 covers on a 2004 GMC Envoy take them both off to reveal the fuses. underneath the cap of the fuse box you will find the fuse diagram. look for the fuse number (location) on the diagram. take out the fuse and check if the metal on the inside of the fuse is melted or broken. replace the fuse if it is. check lights if they work you have solved your problem if not it is something needing more attention.
It sounds like the low beam/high beam switch is bad. Fuses are not the problem since they are built into the headlight switch and would cause headlights to blink or not come on for both high and low beam headlights.
there are two diff types of bulbs. High beam and low beam bulbs. If your low beam doesn't work then you need to replace those lights because they are probably blown.
In most cases the high and low are separate elements in the same bulb and cannot work at the same time. Headlights pull a lot of power and to have them run together would be too much for your charging system to handle at once, not to mention the heat they would produce. Fog Lamps and Low beams and Fog Lamps and HI beams. Fog Lamps and HI beams, in many states, you are not permitted to run HI Beams and Fog / Driving lamps simultaneously. There is an SAE directive on this. There is either a relay or DRL module that prevents the Fog/Driving lamps to be energized when the HI beams are activated.
Possibly two bulbs, possibly the switch. Get it diagnosed. check your fuses for your headlights. i have a '97 accord and installed aftermarket headlights and one day one of my lowbeams wouldn't work but my high beams would be on with my low beams on, and when i switched for the highbeams, my low beams would both go out. you can get a thing at shucks, or even walmart, to check the fuse to see if it's working, very simple to use. :) Did you try replacing the one headlight that only works on the high beam mode? First check to see if you have a relay. If it dont have one, the problem lies on the dimmer switch. Locate the dimmer switch. On some vehicles the dimmer switch is part of your headlight switch. If only one of your headlights is affected then it probably isn't a fuse or relay. A light that is both a low beam and a high beam has two filaments. One of the filaments is probably broken. Replace the headlight and it should fix the problem. i did replace the lamp on a 96 sunfire and the low beam still does not function. highbeams work fine, but no low beams on both headlights now. I have a similar problem. Both headlights low beam filaments on my WRX STi had blown and the replacement low beam filaments blew too??? So I've still only got high beam which is fine but other drivers are getting a wee bit annoyed (and rightly so)All fuses are good and correct factory ampage. The new bulbs are H4's which is the factory correct bulbs yet low beam filaments gone on both bulbs. I'm bewildered...
Could be that your low beam bulbs are out in your lights. Or a bad ground. These cars are very sensitive to bad grounds, and it happens all the time. First place to check is buy new headlights. Second is too check ground on fender under hood. Yes it is possible for the ground to be bad and you only get hi beams not low. Dont ask me why. Just is. Seen it a few times at the shop. Have you tried your horn lately?
Most headlights point straight ahead so dont over drive them
Do ensure the beams are clean and free from any debris for accurate measurements. Don't overload the balance with weights that exceed its maximum capacity, as this can damage the balance and affect the results.
i dont know why do you need to have this answer anyway
For finding reactions for simply supported beam with uniformly distributed load, first we have to convert the u.d.l into a single point load. And then we have to consider it to be a simply supported beam with a point load and solve it. I think you know how to calculate the reactions for beam with point load.
I would start with the easy answer. Check both of your headlamps to be sure that the low beam filament is still intact. If all is well there, I would start leaning towards the multi-function switch (which is the headlamp / turn signal lever.
Why all of a sudden the low beams dont work but everything else does.
dont