2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 124000 miles
Intermitent Problem: Speedometer reads zero, ABS light comes on, and Brake light comes on, and the transmission won't shift out of first. All this ponts to one thing: Vehicle Speed Sensor. My question is this, being that it's only happening intermitently, is it more likely to be the sensor, or the wiring. And, how would I trouble shoot the sensor.
Sadly, an intermittent problem is just that. Intermittent.
Unless the car is " broken" while you are testing things, then you cant be 100% sure of the problem.
You have to use the information you read, your experience, and your gut feelings to try to pick the most logical course of action.
March, 23, 2009 AT 12:24 PM
Just for fun, do you have access to a wiring diagram of that circuit?
March, 23, 2009 AT 3:07 PM
Give me a few hours.
I'll have to get it from a different computer.
March, 23, 2009 AT 5:52 PM
OK, I got the problem figured out. I went to the junkyard and got a used vss for $20. There's a leak at the transfer case rear output, so I replaced the seal and topped of the fluid. Took her for a test drive and didn't see the fault reoccur. Thanks anyways.
March, 24, 2009 AT 11:37 PM
Sorry, I didn't get the schematic up last night as I said I would.
Good luck with the used VSS fixing the problem.
With the problem being intermittent, you really wont know if you fixed it, but time will tell.