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1989 Chevrolet 3 4 Ton Pickups Base Fleetside 131.5

1989 Chevrolet 3 4 Ton Pickups
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January 24, 2013, 11:09 pm

Richard W
Expert Mechanic

The code reader just reads codes. A scan tool can run the electrical motor in the ABS unit. When you hit the brake and it starts to skid. The ABS soleniod and valve open and close really fast to that the rear brakes don' t lock up. That is why there is a computer for the ABS. The valve is internally bypassing. That is why the pedal move to much and they don't work. If the vehicle does not go on the road and just stays on the rance I would bypass the valve.

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January 25, 2013, 6:18 am

Allen L

That was kinda what I was thinking...on the other hand I'm always trying to learn more about cars...that kind of thing...and I've never tried to run a brake scan tool. Does it hook up to the same place you read codes at??

Do you have to run the scan tool at the same time you are bleeding the brakes??

Would the scan tool tell me if vale is defective or not??


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