HID Auto Check Fix

HID Auto Check Fix - Phase 3: Lobotomize the autocheck lamp...

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Phase 3: Lobotomize the autocheck lamp warning module For the auto enthusiast who can't discern that a headlight has burned out, Audi has thoughtfully equipped the car with a warning system that beeps and displays a yellow X-ed out bulb in the autocheck display. The lamp warning module on the UrS4 is a complex piece of kit located in the main relay box in the plenum under the hood. It also warns for burnt out taillights and brake lights, which is a useful feature. The headlight warning circuit consists of two precision resistors and an IC which compares microcurrents across the headlight bulb filaments. Since the ballasts have a different resistance than H1 bulb filaments, the autocheck will drive you to distraction unless you make like a neurosurgeon and lobotomize the thing. The procedure I used is based on Igor Kessel's excellent post in the Headlights section of urs4.com, here. Don your scrubbies, wash up, and let's begin. 1. Remove the lamp warning module and gurney it to the operating table. It looks like a double-wide relay and is
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This note was uploaded on 04/15/2009 for the course MECH Mech 220 taught by Professor Ikovic during the Spring '09 term at NJIT.

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HID Auto Check Fix - Phase 3: Lobotomize the autocheck lamp...

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