Information on how to reinstall the wiper arm for the C3 or C6p comes from https://docs.turnerdesigns.com/t2/doc/instructions/998-2308.pdf
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How to reinstall C3/C6p Wiper Hub
Normally the set screw in the home position is hidden by the temperature rod.
βConnect unit to C-SOFT
Go to the Log Setup Tab
Press test wiper
As soon as the screw moves clear of the temperature rod, disconnect power supply from C3 cable.
βUninstall titanium screw with small flat head screwdriver.
Reinstall the new motor hub.
Replug C3 back to Csoft and power supply.
Press test wiper in log setup to ensure the set titanium screw reorients itself and returns to home position behind temperature rod.