download Volkswagen has identi?ed that a problem with the ignition switch may result in the ABS warning lamp being illuminated on Passat, Corrado and EuroVan mod- els from 1993. VW Bulletin No. 93.01 identi?es that an ABS warning light which does not go out after vehicle start-up may be caused by the ignition switch/lock not fully returning from the “start” position (terminal 50) to the “run” position (terminal 15). If the switch/lock does not return to the run position, circuits controlled or powered by terminal X (for example headlights, evapo- rator fan and ABS hydraulic pump) will not function. A non-functioning ABS hydraulic pump will cause the ABS warning lamp to stay on. If the ignition switch binds or does not return smoothly from the start to run position, check for misadjustment of the shift/lock cable, an ignition switch sticking or binding, or a burr on an improperly cut and deburred ignition key.