ABS sensors testing .

[jaimster]

ABS light on therefore i think i need to test the ABS sensors i have located where the yare , any body knows best way to test them : checking tolerance or voltage readings what should they read?
i got the car on all 4jacks stands right now . so i didnt whant to set the tires back on . thanks

[yodawill2000]

Are you sure its not the relay under the hood back by the passenger side firewall ?
If its stuck it will buzz after shutoff, and the abs light will be on when its running.
I have to bang mine with a screwdriver every once in awhile.
That shuts it off and the buzzing stops.

[jaimster]

i dont thonk i hear any buzz noise when i shut off the car and thought i swapp this relay with another and light was still on. ill have to check it out again - or how would you test the relay with a meter.

[driverdriver]

If you don't hear a buzzing, likely culprit is that the ABS pump is done.

[fourdrinie]

The brake section of the FSM has the relay testing procedure, page BR-62

[Mkiisupra]

I would check to see if the sensors are dirty before assuming anything is defective. Assuming is a good way to waste a lot of money.

[jaimster]

thanks guys ill check the relay testing procedure and also ill check the tolerance on the abs speed sensors .
if all that is good ill go after the pump.
what else could be right!!!!