This video outlines the basics of power tool and appliance electrical diagnosis. You can use a multimeter to test tool and appliance cords and switches, the two parts usually responsible for electri...
I have been using my DeWalt 7770 Radial Arm Saw for 32 years now. Over that period there have been occasions when the motor would not start and just sit there and hum when I switched it 'On'. I would then unplug it and open the control box on the top of the motor and clean the contact on the relay and it would be good for quite a while again. However, recently the relay has not been receptive to cleaning of it's contacts and I've been trying to purchase a replacement relay (PT#85288). The relay is shown on Page F, Item 39 in the parts listing for model 7770-10, but it is not a listed item for purchase.
If someone can steer me in the direction to purchase a replacement relay I'd certainly appreciate it.