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#1
03-26-2006, 03:23 PM
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Testing a speed sensor
I have a 1993 chevy G20 van and the speedometer quit working and the trans wont shift out of first after I changed the battery, spark plugs, and air filter. Someone told me to check the speed sensor, so i replaced the speed sensor and it didn't fix the problem. Is there a way to test the speed sensor or the connection. Please let me know as soon as possible. Thank you.
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2004 Grand Prix GTP Comp G 1996 Volkswagen Passat GLS 
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#2
03-27-2006, 02:51 AM
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Re: Testing a speed sensor
Most of the later VSS are optical, not magnetic. The only reliable way to test is with either a datalogging scanner or a logic probe at the wire harness.
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#3
03-28-2006, 12:19 AM
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Re: Testing a speed sensor
in your 93 you can check it with a dmm and check the ohm rating on all vss, if one is out in left feild, its bad, i beleve 15k to 20k ohms is exceptable
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