Product review (5 stars): a good unit will have around 200 +or- ohms
installation is very simple. you can test your questionable igniter with a multimeter. a good unit will have around 200 +or- ohms. a bad one should show infinite resistance due to being open or blown. if your new unit doesn't come with the factory supplied connector you can connect the unit using wire nuts. polarity isn't an issue as the unit is powered by a/c voltage. I keep a spare on hand as these igniters aren't known for an extensive lifetime. happy baking!!