Wiper Stalk Switch Input
The wiping stage inputs are coded signals through a two wire link with a combination of high/low inputs.
Scheme 346
The wiping stages include
- Single (S) - Momentarily holding the wiper switch down in the single position provides a momentary ground signal to activate a single sweep in slow speed.
- Slow (I) and Fast (II) - The stage I and stage II wiping speeds are road speed dependent. Stage I switches to intermittent when the vehicle is stopped and stage II switches to stage I when stopped.
- Windshield Washing - The wash request provides a switched ground input to the GM by pulling the stalk rearward. The GM activates the windshield washer pump directly.
- Intermittent (Int) - The intermittent wiping time inputs are provided by a potentiometer mounted in the wiper stalk switch (1 through 4). The intermittent wiping intervals are also dependent on the road speed. As road speed increases, the wiping interval is shortened.
| Thumbwheel Position | Vehicle speed in MPH | |||||
|---|---|---|---|---|---|---|
| < 4 | 5-22 | 23-45 | 46-60 | 61-87 | >87 | |
| Wiper time delay in seconds | ||||||
| 1 | 26 | 19 | 17 | 15 | 15 | 13 |
| 2 | 17 | 12 | 11 | 10 | 9 | 7 |
| 3 | 10 | 6 | 6 | 5 | 4 | 3 |
| 4 | 5 | 3 | 3 | 2 | 2 | 2 |
WIPER INTERMITTENT INTERVALS