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Its been so long since I messed with this, I'll have to go back and look.

Awesome. Pretend (not difficult) that I'm a wee slow. :D Where do I stick the pointy metal probes? Reading a little further, I saw here https://www.steelsoldiers.com/showthread.php?79389-M923A1-Abs-Light/page3 where 2B is reported to be passenger side, rearmost axle. Tracing where the...

Well, I got my info center. Plugged it in and first fault is an S2B 04. Which translates as "2B Sensor/wiring open or short circuit." The manual lists possible causes as: Sensor failures, sensor wiring open or short circuit. Sensor resistance should be 980 to 2350 ohms. Verify wire ties...

Not to dig this grave up too much, but I went ahead and soldered in a new diode on my ECU and put it back on the truck. I actually desoldered the old diode and pulled it out of the board completely and soldered a new one in. I'm guessing I got the polarity on the diode right. I get the the...

The diagnostic tool for the ABS on these trucks is available in europe from a few vendors, but it's a bit expensive. In the neighborhood of 350 bucks. Saw an old ebay listing of one for 40, tho. I'm curious what trucks in europe use the same ECU or compatible ABS parts as are on the 939...

Will do, Thanks. That's why I was thinking about doing this at the airport. No ditches or fences to run into if I lose power steering. Just clear grass field on either side.

There is a muni airport just down the road. I might see if they'll let me use the runway to test my ABS.

Not surprising. When this one fails, I'll probably just go with a commercial AC delco alternator. Slightly related, you can make a Prestolite regulator work with a Hellas alternator. Turn down the tongue on the Prestolite regulator so it'll fit into the Hellas body and just hook up pins...

Thanks, I will look into doing exactly that. I'm sure it was an alternator issue. I just replaced the voltage regulator on mine. Old one had VERY burnt out diodes on it.

I would buy another ECU, but I just don't have the money. Is there really no way to clear an error code on these things without the reader tool from haldex?

Ok, there is something to the original post in this thread. Before doing anything: My ABS light was always on Would blow the 15 amp fuse under dash every time No self check clicks After pulling the ECU and clipping the 5kp33ca diode in the picture: ABS light still always on No longer blows...

Thanks, I don't think I would have ever found it. I was going crazy trying to find it in that mess under the dash with flashlight. Off to go look again...

Where is the ABS ECU located? I can't find it anywhere in the 4 volume TM pdf. It's not the same thing as the Protective control box (PCB) is it? I'm having the same symptom. 15A fuse under dash blowing as soon as I turn the switch, ABS light constant on. eta: Well, they're definitely not...