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EarlyBay Forums
Technical
Wiper Wiring Diagram Help - Switch and Earth - Why?
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<blockquote data-quote="Trikky2" data-source="post: 564180" data-attributes="member: 240"><p>A normal add on unit won't work because when your intermittent circuit wants to power the wiper motor it will still be earthed - (hence it will short to earth). You need the intermittent cirquit built in such a way that it disconnects the earth before applying power to the motor, as per the original switch and relay setup.</p><p></p><p>Your alternative suggestion of using the interrupt on the existing power supply after the switch will work without causing a short to earth but then the motor will have no earth braking to make it park and will tend to sweep on.</p></blockquote><p></p>
[QUOTE="Trikky2, post: 564180, member: 240"] A normal add on unit won't work because when your intermittent circuit wants to power the wiper motor it will still be earthed - (hence it will short to earth). You need the intermittent cirquit built in such a way that it disconnects the earth before applying power to the motor, as per the original switch and relay setup. Your alternative suggestion of using the interrupt on the existing power supply after the switch will work without causing a short to earth but then the motor will have no earth braking to make it park and will tend to sweep on. [/QUOTE]
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EarlyBay Forums
Technical
Wiper Wiring Diagram Help - Switch and Earth - Why?
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