User: how to change headlight direction
Assistant: To change or adjust the headlight direction (aim) on a fourth-generation Toyota Celica (ST160, ST162, ST165), follow the steps below derived from the official service manual and user discussions:
1. Preparations:
– Make sure the headlights are raised or lowered by using the light control switch.
– Important: Before adjusting, remove the RTR fuse (30A) to avoid electrical issues during adjustment.
2. Adjust Headlight Cover Position (Forward/Rearward, Left/Right):
– Loosen the headlight cover set screws.
– Move the headlight cover in the desired direction (forward, backward, left, or right) to align properly.
– Tighten the cover screws after adjustment.
3. Adjust Headlight Slant (Vertical Tilt):
– Loosen the stopper lock nut.
– Lower the headlight.
– Turn the manual operation knob (this knob allows aligning the rod and crank arm under the headlight assembly).
– Adjust the rod length to set the headlight slant (tilt angle).
– Tighten the stopper lock nut after slant adjustment.
4. Adjust Headlight Stopper Position:
– Raise the headlight.
– Turn the stopper counterclockwise until it contacts the headlight bracket.
– Then turn it an additional half turn counterclockwise.
– Tighten the stopper lock nut.
Additional Tip for Pop-up Headlights that don’t align or retract properly:
– There is a plastic manual adjustment knob on the bottom of the headlight motor assembly (located behind the headlight under the front bumper).
– Removing the rubber cover from the motor reveals this adjustment shaft.
– Turning this knob clockwise or counterclockwise manually raises or lowers the headlight. This can be used to manually set the position if the motor or mechanism is out of sync.
– If the headlights are not synchronizing or one headlight doesn’t stay in position, checking and adjusting this rod and knob is recommended.
– Lubricate threads and linkage as needed and use appropriate size wrenches (e.g., 10 mm) to make adjustments.
In case the motor doesn’t function or the linkage seems damaged (e.g., missing teeth on a track), the headlight motor may need replacement. The headlight motor bolts on and can be relatively easily replaced.
Summary: Adjustment involves loosening screws and lock nuts around the headlight assembly to move the cover and change slant and stopper positions, plus manual adjustment of the linkage via the knob on the headlight motor to align pop-up lights properly.
This is the official adjustment procedure with community tips on manual adjustments to correct directional issues and motor syncing problems【4:0†ToyotaCelicaBGB1989_21_Body_BO.txt】【4:3†ToyotaCelicaBGB1989_21_Body_BO.txt】 .
If you want, I can provide more detailed steps on locating and turning the manual adjustment knob for the headlight motor or on diagnosing motor function issues.