2008 SRX Sport Pkg
The rear wiper starts then stops at perhaps a 20% sweep, continues and stops at 50%, sits then continues and stops full at the far end. Eventually it will come sweep back after making more random stops. The wiper arm looks to be secure on the motor. What is this likely caused by? Is the wiper motor going out or could it be something else? This started happening after a dramatic warm up from 0F to 50F in a few days.