1998 Oldsmobile Aurora Owner's Manual - Page 288

Headlamp Aiming Your vehicle has the composite headlamp system. These headlamps have horizontal and vertical aim indicators. The aim has been pre-set at the factory and should need no further adjustment. If your vehicle is damaged in an accident and the headlamp aim seems to be affected, see your retailer. Headlamps on damaged vehicles may require recalibration of the horizontal aim by your retailer. ~ 0 Tires should be properly inflated. Rock the vehicle to stabilize the suspension. NOTICE: To make sure your headlamps are aimed properly, read all the instructions before beginning. Failure to follow these instructions could cause damage to headlamp parts. For the vertical adjustment, state inspection stations generally will allow a reading of plus 0.76 degrees or minus 0.76 degrees from the center of the bubble. It is recommended that the upper limit not exceed plus 0.4 degrees from the center of the bubble. Other drivers may flash their high beams at you if your adjustment is much above plus 0.4 degrees. To check the aim, the vehicle should be properly prepared as follows: 0 The vehicle must have all four tires on a perfectly level surface. If necessary, pads may be used on an uneven surface. The vehicle should not have any snow, ice or mud attached to it. The vehicle should be fully assembled and all other work stopped while headlamp aiming is being done. There should not be any cargo or loading the of vehicle, except it should have a full tank of gas and one person or 160 lbs. (75 kg) on the driver's seat. 0 0 0 6-36