Had this problem on a 1995 JCL, it was the DRL (daytime running lights) module. If you're lucky yours will cost $100, mine was $350. It was located to the left of the steering column and over a metal plate (white box) completely hidden from view. Do not buy Jeep, they are electrical problem prone and nightmares.
Headlight blackout kits are illegal in some places because of safety concerns. An installed kit can cause headlights to function improperly leading to poor visibility.
There is no headlight motor. The entire headlight raising and lowering function is controlled by the cars vaccume system.If your headlights don't operate correctly,I suggest that you either check the vac. hoses or the vac diaphragm's located under the hood in front of the radiator.
check the fuses, bulbs, relays, headlight switch, and the multi function switch in steering column. also check to see if you have lost the ground to the bulb sockets.
Concave-shaped headlights are able to scatter and disperse the light rays produced by the bulb inside, making the light more noticeable from a distance as it can travel further, which is exactly the function of a headlight. Convex-shaped headlights, on the other hand, converge the light rays produced, causing it to travel only a very short distance and does not serve the purpose.
There are 2 controls for each headlight. The outer control hex shaft (4mm) controls the up and down function and the inter hex shaft controls the side to side function. It is hard to find the portion you turn on the back of the headlight assembly. The inner shaft is about in the middle and not hard to find. The outer shaft is hidden by the top of the brace and is hard to find.
Could possibly be a dimmer switch for the Hi Beam lights
The manual switch good for being able to park with the lights off and the engine running. The automatic function can help to keep you from forgetting to turn on the headlights in an area where street lighting is good.
Halo and projector headlight are pretty much the same thing. They function very similarly. However, Halo will give you the look that you seen on BMW headlights. Projector headlights will look the same as those other premium luxury brands. They're becoming pretty cheap nowadays, can be had between $50 - $200. I just bought one set for my car, it pretty much transformed how my car looks. The light output is much brighter. Making my car stand out from the crowd and I'm feeling safer at night too. Here's where I got mine, they're offering free shipping and 10% off right now. http://www.carpart4u.com/autopart/Projector-Headlights-p-1-c-6.html
product of all transfer function relating input and output when the feedback loop is disconnected from the comparator
I know that if you move the turn signal lever ( which is part of the multi function switch ) away from you it turns on the high beam headlights and if you move it towards you , you only have low beam headlights ( and if you pull the turn signal lever all the way towards you and then release it the high beam headlights will flash each time you do that )
Most vehicles produced in the last several years have an autmatic function that turns the headlights on for safety purposes. It has been proven that even in daylight, cars with headlight on are easier to see. Most have a feature that allows you to over ride it. If you don't have the manual just stop by the dealer and one of the sales reps can show you how to do it. Personally I like the extra safety it provides.
You can adjust the headlights on a Saab 9.3 using the switches inside of the car. There should be a function to turn the highlights on, off and bright.