just the two inside lights the out sidelights are low beam
start by checking your fuses.
The horn is located on the drivers side between the grill and radiator, next to the headlights.
To adjust the headlights on a 1989 Acura Integra, first park the vehicle on a level surface about 25 feet from a wall. Turn on the headlights and use masking tape to mark the center of the light beams on the wall. Locate the vertical and horizontal adjustment screws, typically found on the headlight assembly, and turn them to align the beams with the tape markings. Make small adjustments and check the alignment until the headlights provide optimal visibility without blinding oncoming drivers.
To adjust the headlights on a 1989 Plymouth Acclaim, first park the car on a level surface about 25 feet from a wall. Turn on the headlights and mark the horizontal and vertical centerlines of the beams on the wall. Then, locate the adjustment screws near the headlight assembly; typically, one adjusts the vertical aim and the other adjusts the horizontal aim. Turn the screws as needed until the beams align with the marks on the wall.
A 1989 Chevy truck typically uses two leadlights for high beams. Leadlights, or headlights, are usually configured in pairs on vehicles for high beams and low beams. Therefore, it is unlikely that a 1989 Chevy truck would use four leadlights for high beams. It is important to consult the vehicle's manual or a qualified mechanic for accurate information on the specific headlight configuration for that model.
I'm not a mechanic / technician but if your battery is overcharging or the headlights are too bright so people are flashing their headlights at you when you are just using low beams ( it sounds like a voltage regulator problem )
Suburban Base was created in 1989.
Bad bulbs or multifunction switch
is a switch to change to low beam is located under the emergency brake
Bad bulbs? Bad dimmer switch?
Yes it is.
On my 89 Probe it overcharged because I needed a new alternator. Sometimes a bad computer causes "spikes" in the voltage. In this case, turn the headlights on at night, if they flicker like high beams, then the computer is NG. -CE