Aiming hid lows and fogs
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Team Owner
Joined: Jul 2002
Posts: 25,238
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From: Oswego NY
Cruise-In IV Veteran
Cruise-In V Veteran
Aiming hid lows and fogs
Can anyone give me an idea of how high the cut off should be for each with only a short distance between the car and a wall? I can't get my car out of the garage right now and i want to aim both before i put the bumper back on. TIA 
Tech Contributor
Joined: Dec 2003
Posts: 19,384
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From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Fog Lamp Aiming
There is no horizontal aiming for the C5 foglamps
Preparation:
Prepare the aiming area. You can use the garage wall providing its at least 25’ from the car and the ground is level. Make sure the tire pressures are correct and the tank is full or the calibration may be out. Park the vehicle square with the aiming surface. Close the doors and rock the car to stabilise the suspension.
Mark some calibration lines using chalk or masking tape:
Find the center of the headlight and measure the distance to the ground. Mark a horizontal line on the surface (garage door or wall) using masking tape at the same distance from the ground.
Stick a piece of tape in the center of the windscreen and another on the rear glass to use as reference marks.
Line these up from behind the car and use them to mark the centerline of the car on the wall.
Measure the distance between the center of both headlight lenses and use this to measure from the center point you just marked on the surface.
Adjustment
Raise the hood.
Raise the headlamps.
Turn ON the low beam lamps. Block the light from both headlamps to allow you to adjust the fog lights. Don’t cover the headlights or they may get too hot.
Turn on the fog lamps
Insert a torx driver through the front fascia deflector access hole to reach the fog lamp vertical adjustment screw
Adjust the fog lamp up or down until the top edge of the high intensity zone is 4” below the horizontal centre line.
Turn off all the lights
Thanks to Junkman for his pics
There is no horizontal aiming for the C5 foglamps
Preparation:
Prepare the aiming area. You can use the garage wall providing its at least 25’ from the car and the ground is level. Make sure the tire pressures are correct and the tank is full or the calibration may be out. Park the vehicle square with the aiming surface. Close the doors and rock the car to stabilise the suspension.
Mark some calibration lines using chalk or masking tape:
Find the center of the headlight and measure the distance to the ground. Mark a horizontal line on the surface (garage door or wall) using masking tape at the same distance from the ground.
Stick a piece of tape in the center of the windscreen and another on the rear glass to use as reference marks.
Line these up from behind the car and use them to mark the centerline of the car on the wall.
Measure the distance between the center of both headlight lenses and use this to measure from the center point you just marked on the surface.
Adjustment
Raise the hood.
Raise the headlamps.
Turn ON the low beam lamps. Block the light from both headlamps to allow you to adjust the fog lights. Don’t cover the headlights or they may get too hot.
Turn on the fog lamps
Insert a torx driver through the front fascia deflector access hole to reach the fog lamp vertical adjustment screw
Adjust the fog lamp up or down until the top edge of the high intensity zone is 4” below the horizontal centre line.
Turn off all the lights
Thanks to Junkman for his pics
The problem is i don't have the 25' that the manual is asking for 
