Hi I'm back again!!! My fourth time here. Ive owned a 1500, 2500, and a Dakota. All second gen. I just purchased a new truck yesterday. A 2003 dodge ram 1500. After driving it all day the CEL came on!!! The guy I bought it from swears it wasn't on before. I knew and tried to cycle the key and it worked it read po344 cam shaft sensor.

So I pulled out the sensor and the connector. The two outsides wires are power one battery, one computer. Not sure which is which I haven't found any color codes. I checked them both with my multi meter and they're both putting out 5 amps. The middle ground is good. Now if I'm not mistaken. When you take your meter and put it from one outer wire to a ground it should zero out on one side right? Then the other side should be constant 12v? Well when I do this is always stays at 5v it never changes. So is the sensor bad? Or am I screwing something up????

The new truck

 

One wire should be a five volt feed, another wire will be signal return to the PCM, third wire should go to ground. None of them should be seeing 12 volts.......

 

So how would you test the sensor it self.?

 

Its a hall effect switch. (likely a tone generator.) Probably need an o-scope to properly test it.

 

You might get a obd2 reader that can see that output and graph it. I use an inexpensive bluetooth obd2 from Amazon and the torque app on my phone. I don't know if it has that output as one of the graph-able elements or not....