Antilock brake problem

I recently got an '88 Turbocoupe. The antilock brake light is lit, and when I check the code (using the paperclip in the test connector method) it shows code 22.
I understand that this indicates a problem with the left hand valve in the hydraulic unit. I replaced the hyd. unit with a used one and get the same code. Is the code stored in memory, if so, how do I clear it?
Anything else I should be looking at?

Thanks

Have you driven the car after replacing the unit?

If you wish to actually check the valve block to ensure it is working, you can see my website below that shows the resistance and which pins to check for this specific code: http://www.tbirdheritage.com/turbocoupew...stepid=CC1

After a problem is repaired, the code for the problem will remain stored in the ABS computer until the car is driven over 25 mph. Driving over 25 mph erases the code, assuming the problem has been fixed.

After getting the code 22, did you do any troubleshooting, like measuring the valves resistance atthe valve block 7 pin connector, and verifing the continuity from the valve block harness to the ABS computer. If you didnt do these things, there is a fair chance the problem was not a bad valve solenoid coil in the first place, but is a wiring problem.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car)

Thanks! Finally a nice weekend here and I was able to gt some more info.
I checked the resistance in the valve body, and it indicates that's not the problem.
I also drove the car above 25mph, and that didn't solve it. Is there anything special I need to do, other than get the car above 25mph?
So now it sounds like the wiring harness. In what way do these typically go bad? Are they replaceable, repairable?
I cleaned the connections at both the hydraulic unit and the computer in the trunk. I then traced the harness from the hydraulic unit to the passenger side firewall. Does it go straight back to the trunk from there?
What do you suggest I try next??

Thanks
Ken

i would test the circuit between that solenoid valve and the abs computer, which in this case is known as circuit 495. It is the solid Tan wire that connects that solenoid valve to the abs computer located in the trunk. There also is a common ground for that solenoid valve and the others inside that valve block.

i would first use an ohm meter to test the resistance at the terminal in the wire harness for that solenoid valve, to the terminal connection at the ABS computer to ensure that there is no breaks in wire from start to end.

You probably knew that already, but that would be my first step.

[This message has been edited by JT (edited 02-06-2005).]

JT and others,
Thanks for your reply. I do appreciate it!
I'm going at this slowly due to continuing cold weather, etc.
I checked the resistance of the tan wire from the valve block connection to the abs computer connection in the trunk. It checks out okay.
What next? Is the problem in the computer itself, or is there another test I can run?
Thanks again,
Ken

Even though the book says to only check that circuit 495 and if it is OK, to replace the ABS computer, i would also check the common ground before doing that.

The common ground is the Black/White wire that runs from the solenoid valve block to the ABS computer. It is a common ground for all the solenoids in the solenoid valve block.

KSmith, you have a PM

PM?

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