MoTeC Installation 7
The wiper unit can be wired using an OEM wiper controller with the PDM
supplying the power only.
The OEM controller performs the intermittent and motor braking functions.
2. Two Switch Method
The wiper unit can be wired in a simple two switch arrangement; one switch
for power and the other to select fast or slow. The PDM supplies power only.
Wiper motor braking is performed by the combination of the park switch and
the on/off switch.
This arrangement cannot perform intermittent operation since the wiper will
not park if the PDM simply removes power.
The switches must be able to handle the wiper motor current (typically
4 ampere).
3. Relay Method
The two switch method can be modified for intermittent operation by replacing
the on/off switch with a relay. The PDM controls the relay to perform the
intermittent function. This requires two PDM outputs; one to supply power and
the other to control the relay.
Motor braking is performed by the combination of the park switch and the
relay switch.
The PDM must be configured with the appropriate logic to perform on/off and
intermittent operation based on the state of the control switches.
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