Lubrication & Maintenance/Daily 6. 4.5 L Suffix Earlier Engines Only: Turn key switch to position and check lamps. “WATER” lamp should be off, while and lamps should be lit. Replace lamps as needed. If this does not solve any problems, see your John Deere dealer or distributor. RG6578 –UN–29JAN93 Key Switch in "ON" Position (4.5 L Engines) OURGP11,000018F –19–12FEB04–5/5 25-5 021604 PN=137