With it unplugged and the ignition switch on, you must find 5.0 volts on the feed wire, and you'll have 0.2 volts on the ground wire.
If you don't have 5.0 volts, there has to be a break in that wire. There's no splice in that one because that wire is specific to that sensor. When you find a little voltage there, it's getting there through some corrosion. A digital voltmeter needs almost no current to read the voltage, and that's what corrosion does. It prevents current from flowing. If you'd use a test light, which would light up dimly on 5.0 volts, you'll see it doesn't light up at all on your wire. Test lights need current to operate, and current can't get through the corrosion.
That is different than a total break in the wire. The voltmeter would not see any voltage then. You didn't say what you are getting for voltage. Is it 0 volts or something higher?
Friday, January 3rd, 2014 AT 8:34 PM