These are both hall effect sensor right? It seems a lot of people (including me) just replace parts like these on suspicion.<p>I'd like a way to test these things. I hate throwing money at problems.<p>For each of these sensors, what is the hall effect exitation voltage? What is the expected voltage output? Are the sensors sensitive to oil, pollutants, etc?<p>I'm going to be pulling these apart on my car soon, so as soon as I do some testing I'll do a DIY to make it easy for people in the future.