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Under the hood, at the front of a 1990 Buick Reatta, the horn is located on the driver's side, behind the fog light and mounted to the frame. If you lay down at the front of the car and look up under the fog light, you will see the horn.
I have found the easiest way to replace the sidemarker lights is actually from underneath the vehicle. I you can get the bulb out from underneath, with a squeeze and a twist, the bulb can be replaced without removing the whole assembly.
front driver's side of car about even with the front of the door. it's difficult to deal with even on a lift.
Put a socket and ratchet on the tensioner belt pulley. Pull to the side, releasing the belt tension. Remove the belt and put the new one on, a helper will make this easier. Take the ratchet off to re-tension the belt.
under dash on passenger side of vehicle
Just drive it until it falls off, since it's its 1990 Buick. jk, i really dont know.
The turn signal Flasher Relay is located… Front seating area, center, under dash, mounted in front driver side of console.
The 1990 Buick LeSabre oxygen sensor is located on the outside of the air cleaner housing. The oxygen sensor will be on the back side of the housing.
try the glove box.or under the dash on your left side.
Hey Arlene==Look under the dash on the drivers side of the steering column. GoodluckJoe
The fuel filter is on the drivers side fuel line by the gas tank under the car.
The fuse box panel for a 1990 Buick Century is located on the driver's side of the car interior. It is just below the headlight switch. There is also a fuse box panel for this vehicle located in the engine compartment near the battery.