INSTRUMENT PANEL LAMPS Water in Fuel (WIF) Lamp is listed in Table 4. Table 4 Water in Fuel Instrument Panel Lamp 68 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION Lamp Indicator Description Results Water in Fuel (WIF) Lamp Flashes for 5 seconds at the start of every ignition cycle (a bulb check). Indicates the fuel filter has a high level of water and must be drained. Light stays lit indicating water must be drained from filter.