Discovery II
WIPERS AND WASHERS
84-10
DESCRIPTION AND OPERATION
Variable delay switch
A rotary type variable delay switch, integral with the front wash/ wipe switch, controls the interval between windscreen
wipes for intermittent wipe variable delay operation.
The variable delay switch is integral with the front wash/ wipe switch.
The input from the front variable delay switch to the BCU ranges from battery voltage to zero Volts.
The resistance values and associated time intervals of the variable delay switch are shown in the following table:
TestBook has the ability to monitor the timer function within the BCU from which it can determine the position of the
variable delay switch.
Resistance, ohms
Time interval, seconds
Front
Rear
0
3.5
6.5
1500
5.5
10.5
3000
7.5
14.5
4500
9.5
18.5
6000
11.5
22.5