Volvo V70 Window switch block modification
The Volvo
V70 window switch block can fail when the switch contacts become dirty or
pitted due to arcing. Eventually it will fail and the electrical resistance of the
contacts can become high enough to cause enough heat to melt the plastic
movement inside the switch.
The
following modification reduces the current flowing through the switch from 16
amps (when the window motor has stalled in the fully up or down position) to
about .001 amps (1ma) therefore the switch life is increased dramatically.
Images:
Circuit diagram of the relay module
Relay module mounted on
driver’s side door
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