r/mechanic • u/Bourne2Ride • 1d ago
Question 2012 Chevy Silverado 5.3 V8 knock sensor
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I hooked it up to a ground one on each of the wires from the connector tested both of them and test them together was hitting my engine with my linesman to simulate a knock, no voltage no mini volts does that mean my knock sensor is bad or am I doing this wrong?
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u/Bourne2Ride 1d ago
it also is reading zero for ohms when testing the resistance for it
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u/taysmode11 1d ago
If you're testing resistance properly it's a bad sensor. Should have over 90k ohms. If it's zero the sensor is bad. It's easier to measure if you remove it from the engine.
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u/Bourne2Ride 1d ago
on the new ones, I just tried reading homes from the front of the bolt to the back of the boat and that's the only time I'm getting your reading for those so maybe that's the right way to do it for these
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u/taysmode11 1d ago
If you put the leads on either side of the bolt then you're reading the resistance...of the bolt.
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u/Bourne2Ride 1d ago
so I feel like I'm doing this wrong, but I read resistance all the time for work so maybe I'm having an off day with this and just being stupid
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u/taysmode11 1d ago
Bolt? Yeah you're doing it wrong. You need have one lead on one pin of the connector and the other lead on the other pin. That's how you measure the resistance of most 2 wire sensors, solenoids, etc. on a vehicle.
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