Brake test results

[F14CRAZY]

Howdy. Today the brakes of my dad's '90 started to act weird. I first fired it up and drove it out and found the yellow anti lock light to be on (and stayed on). I tried a panic stop in the driveway (not that fast on cement) and found that the brakes weren't very effective and pedal was hard. I tried it a couple more times and it kind of fixed itself. It stops fine (close to normal if not normal) but the pump keeps running. If stepping on the pedal normally, it stops fine but the anti lock light still comes on. If stepped on hard, the red brake light will come on. Both go out when let off. I took the tests...

test 1: 1

test 2: 1

test 3: 2, 3

test 4: 3.25 (almost at the same time that the yellow light goes out)

test 5: 1

test 6: two millimeters (not much at all)

test 7: sunk a lot, came up slightly, made the thump sound.

According to documentation at Reatta.net, it has a bad accumulator. I haven't bought anything yet but the Buck dealer quoted me $186 and special ordered. Is it indeed the accumulator?

(note: I'm more into deeper technical Reatta stuff than my dad. He's the master plumber. I'm thinking of the accumulator as a well pressure tank. If it goes bad, then the well pump has to run a lot more because the tank can't keep up pressure. The well pump will run whenever a faucet is turned on (brake pedal depressed). This make any sense? )

[F14CRAZY]

note: we did flush the brakes a couple months ago and the vehicle has been in heated, dry storage.

[padgett]

Have two circuits: boost and ABS. Does sound like you have a bad accumulator (more like $100 at various places including gmpartsdirect.com - many previous posts). However if red light is going out and yellow is staying on then you also have a problem in the abs circuit. Go to www.reatta.net to find out how to pull the ABS codes.

[F14CRAZY]

Thank you Padgett. But, after I got it out and went for s quick spin in the driveway, both of the lights are OFF when not pressing on the pedal or right after pressing the pedal. The yellow light is NOT staying on. I probably confused you there in my initial rambling; apologies.

[padgett]

Then replace the accumulator and we'll go from there - may take care of everything. p/n 25528382. Spins on and off like an oil filter. Have to remove straight up to clear the silver thingie inside.

[F14CRAZY]

gmpartsdirect sounds to be around $80 cheaper than the Buck Stealership.

[F14CRAZY]

Pogo: remember, I always skip half of the important stuff