Rear abs sensor testing

Hi,

My abs sensor light and brake light are on in the dash. I think it is related to rear abs sensors because I had to repair wires. Now wires seems good. I tried to test sensors with a multi meter on AC mode as I seen in a video. I have nothing on both sensors. One is brand new. Is it my testing technique that is not good or other thing. Thank you.

 

Check for codes and go from there.

First, connect terminal 4 and 13 of the OBD-II socket (under the dash in front of your left knee) with a jumper wire. (Those are the 4th from the left on the top and the fifth from the left on the bottom.)

Turn the ignition to on. You'll notice lots of flashing lights, but just pay attention to the ABS light. Normally, it should be rapidly and steadily flashing, twice per second. If it has stored a trouble code, it will instead be flashing a pattern that will coding a two-digit number. There may be more than one code being flashed out. It will just repeat the code over and over, so you have plenty of time to figure it out and write it (them) down.

NOW you can clear the codes. Just tap the brakes rapidly 8 or more times, about two taps per second. You don't have to jam on the brakes, just tap them enough to blink the brake lights. If you're successful, the ABS light should return to its normal fast blinking. Now remove the jumper wire, and finally turn off the key.

Now when you turn on the key, the ABS light should just do its normal light for three seconds and go off. If it comes back on, you still have a problem

 

Also check for 12 volts at connector at wheel sensor . 1 probe on pos. terminal other on neg. terminal of connector . Got 12 volt you know wiring good . No voltage check each terminal to see if problems is with pos. wire or neg. wire . If still no voltage o boy . More testing needed . Good luck .