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Mike, What do you plan on doing with the bad unit? If it's going to the scap heap I would like to buy it just for the fun of disecting it to see what's inside... Al '84 M923

My ABS problem was a short on the dump solenoid on the blue circuit, not the ECU. But I followed the troubleshooting procedure and found my short. I did have the Info Centre too and that helped, but I followed both procedures for "fun". Al Jones '84 M923

Positive. See Motherlode of TM's thread where we talk about the 23 series TMs. PM your email address and I will send it to you. The site boss'es have 'em, they just haven't put them up yet. Al Jones '84 M923

TM 9-2320-272-23-2 should get you where you need to go. I has both methods for troubleshooting: with and without the Haldex Info Centre (spelled correctly). It's tedious but follow the procedure. I did and found my problem was a shorted wire. Troubleshooting took two hours and the fix took 2...

Please take a look at the documents again and then get under your truck! Whoever said there are four sensors on two axles didn't do that. This is a two sensor, two modulator value system and it is clearly outlined in BOTH the P2P and Haldex Info Center manual. Sensor 2A is on the drivers side...