Chevrolet 1979 Light Duty Truck Owner's Manual page 54

Push the control lever to the right to start the electric windshield wiper.
The two-speed electric wiper has both a "low" and a "high" speed
position.
Pressing the control will send a measured amount of water or other
cleaning agent onto the windshield and will also cause the wiper lever
to move thus starting the wiper motor. The wiper will continue to
operate until manually turned otT at the wiper control lever.
Fill the washer jar only 3/4 full during the winter to allow for
expansion if the temperature should fall low enough to freeze the
solution.
•
Check the washer fluid level regularly--do it often when the
weather is bad.
•
Use a fluid such as GM Optikleen to help prevent freezing
damage, and for better cleaning.
•
Do not use radiator antifreeze in the windshield washer; it could
cause paint damage.
•
hi
cold weather, warm the windshield with the
defrosters before using the washer-to help prevent
icing that may block the driver ' s vision .
Delay Wiper System
If equipped with this optional feature the wipers may be operated in
any one of four positions; DELAY, LO, HIGH or MIST. The Delay
position provides intermittent wiper operation during periods of light
rain, mist or fog when continuous wiping is unnecessary. The
High speed positions have been described under Standard Wiper
Operation. The Mist feature provides momentary low speed wiper
operation when needed.
The Delay feature is actuated by sliding the wiper control knob to
the first position to the right of "OFF". The amount of delay between
wipes is controlled by rotating the control knob.
•
Maximum delay (slowest wiper speed) is obtained by rotating the
control knob counterclockwise.
•
The delay interval decreases (increased wiper speed) as the control
knob is rotated clockwise. Fully clockwise rotation will allow. the
wipers to operate as if in Low speed.
•
The delay feature may be actuated and adjusted for delay cycling
at any time. However, the delay feature will be canceled, if the
control knob is placed in Low or High speed positions.
M I ST
O F F D E LAY
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H I G H
LOW
Lo
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