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Electrical installation
ELECTRICAL INSTALLATION
2-147
39. WIPE-WASH SYSTEM
WINDSCREEN WIPERS
If the vehicle is switched to contact (G015
activated), a supply voltage will be applied to
connection pin 4/411 of switch C776 through
fuse E025.
The driver now has three choices, i.e. interval,
speed I and speed II.
Speed
I:
If switch C776 is set to position I, a voltage is
applied to pin 21 of the CTE-2 unit through fuse
E025 and contacts 1 and 2 of switch C776
(through wire 4500). Using a transistor switch,
the CTE-2 unit then internally connects pin 23 to
earth, activating relay G237. A supply voltage is
now applied to pin 5 of the windscreen-wiper
motor (B000) through relays G236 and G237.
This voltage runs through fuse E025, relay
G237 (contacts 5 and 3), wire 4506, relay 236
(contacts 3 and 4) and wire 4507.
Speed
II:
If switch C776 is put into position II, a voltage is
applied to pin 46 of the CTE-2 unit through fuse
E025 and contacts 1 and 3 of switch C776
(through wire 4501). Using its transistor switch,
the CTE-2 unit now not only connects pin 23 but
also pin 52 to earth. Both relays G237 and G236
are now activated. A supply voltage is now
applied to pin 6 of the windscreen-wiper motor
(B000) through relays G236 and G237, causing
the windscreen-wiper motor to operate faster.
If the windscreen wiper is halfway through its
stroke and the windscreen-wiper control switch
is set to position 0, the windscreen wiper
finishes its stroke and then stops. This is
possible because the switch in the
windscreen-wiper motor (B000) reverses when
the motor is at an angle in relation to its neutral
position.
If the windscreen-wiper control switch is set to
position 0, switch B000 provides the required
supply voltage to enable the motor to finish its
stroke. If the stroke is finished, switch B000 will
return to its neutral position.
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