1998 Chevrolet Astro Owner's Manual - Page 117

Windshield Washer At the top of the multifunction lever, there's a paddle marked with the windshield washer symbol and PUSH.To spray washer fluid on the windshield, press the paddle. Rear Window WasherNViper(Option) You control your rear window washedwiper from a switch on your instrument panel, next to the audio system. I /\ CAUTION: In freezing weather, don't use your washer until the windshieldis warmed. Otherwise the washer fluid can form ice the windshield, blocking on your vision. To turn the wiper on, slide the switch all the way up. The wipers will clear the window and then either stop or return to your preset speed. For delay wiping, slide the switcheven with the word DELAY in the center position of the rear wiper control. The wiper will cycle every nine seconds. 2-33