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2010 HHR LT - C0050 RR Wheel Speed Sensor Circuit - How to...

Old Aug 27, 2020 | 08:45 AM
  #11  
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Don't you have that backwards, Don? Resistance usually means broken wire, no resistance means good wire?
Old Aug 27, 2020 | 09:33 AM
  #12  
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Turn your DVOM on set to resistance and hold the leads 3 feet apart; what is the reading? Then hold the leads together, completing the circuit; what is the reading?
Old Aug 27, 2020 | 10:44 AM
  #13  
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When the leads are touching, zero ohms. When apart, infinite ohms.
Old Aug 27, 2020 | 01:20 PM
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OK, now set to diode/continuity and do the same thing with the leads. Does it beep when the leads are in contact or not in contact?
Infinite resistance means no measurable resistance not 100,000,000,000,000 teraohms.

0 ohms is a reading, you will probably get some digits if you change the range.

A WSS is probably around 325 KOhms
Old Aug 27, 2020 | 03:07 PM
  #15  
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To clarify, I don't have a DVOM, just a multimeter. Infinite ohms means there is no circuit.
Old Aug 27, 2020 | 05:52 PM
  #16  
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Originally Posted by RJ_RS_SS_350
Don't you have that backwards, Don? Resistance usually means broken wire, no resistance means good wire?
Thank you Blue, Don and RJ.

i think Don meant connectivity between the two leads, aka, presence of some circuit between the two pins and hence some resistance reading between the two leads.

So 0 ohms (full continuity) or some resistance is good.

Infinite (no connectivity) resistance would indicate a bad sensor.

Will try it again this evening.

Btw if it does show a resistance reading (coil intact), could it just mean a dirty sensor (or teeth) and could be cleaned with a pressure washer ? I doubt as the damn thing is all sealed, but just curious if it could be cleaned.

Thanks again.
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Old Aug 27, 2020 | 06:50 PM
  #17  
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No circuit = infinite = broken wire. Any resistance = continuity
a short gold wire would register 0.0001 ohms (made up the number, quite low)
Old Aug 28, 2020 | 12:52 AM
  #18  
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Thank you all.

I got no resistance reading on the supposed bad sensor (rear right) and got 1.8k ohms on the rear left.

for newbies like me, it was difficult to get the multimeter pins in the socket w/o removing the hub or running another spare connector wire.

Easy way to check the same on both wheels and w/o removing either of the wheels is to jack the back and go underneath and trace the wiring from both wheels and it goes into a socket right under the rear right passenger seat. Remove the connector and there are 4 leads/pins - 2 for each side. I checked the resistance there.

I feel good now that it is most likely the sensor gone bad and will order the hub tonight. Hopefully the two bottom nuts do not give me grief.

Thanks again for all the valuable feedback.

Old Aug 28, 2020 | 07:46 AM
  #19  
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Or it's the wire between the hub and where you tested.
Old Aug 29, 2020 | 09:34 PM
  #20  
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Originally Posted by RJ_RS_SS_350
Or it's the wire between the hub and where you tested.
Could be but initially I had tested at the end connector (which plugs into the hub sebsor) and it correctly read 2.33v which means that section of the wire is fine.

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