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I have a oscilloscope coming to test the pulse. I can see wheel speeds on my diagnostic computer.

I have the one from becm to cluster

Would anyone have a wiring diagram for the abs ecu pin out for signal to becm?

Would any of the early spec abs ecu do the job or would every number have to be the exact same.

Although I did try an ecu out of a different vehicle but it had been sitting for a very long time. The numbers nearly matched all but one number. I am sure its a faulty component and not a wiring issue.

This is possibly my issue as I have checked the wiring from end to end. Also new becm refurbished to fix previous faults. So down to abs ecu and clocks. I have no abs faults though so I was steered towards clocks but I'm not sure as I would of thought if it was the clocks she would still count...

I can see all my wheels speeds on my launch diagnostics, would it be possible to have a bad abs ecu an still see the wheels speeds on the diagnostic computer. Wiring and plugs are all checking out OK. I currently have clocks away for testing to make sure they are not faulty to eliminate a few things

Should I be getting a pulse on this yellow wire going from the becm to the speedo or steady voltage? I am getting approx 4volts. I would of thought it should be moving as the vehicle speeds up and down.

Tried an abs ecu today. No luck. I'm confident it's not an abs fault. It has to be a wiring fault or faulty clocks. Does anyone know the wire colour from the becm to the clocks for the speedo signal. I stripped out the loom today and yes was lying in some damp but all wiring seems good from becm...

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The jeep had sat for a long time and done nothing and wasn't kept inside garage. Yes I can see the wheel speeds on the diagnostic launch and all wheel speeds match.

I also done the connectors on the becm with contact cleaner and checked for bent/pushed back pins.

@Datatek The milage does not increase on the digital display as ive been keepin an eye on it. Im confident ive ruled out the abs/abs ecu. Originally the car had severe electrical issues. Wipers on full time, no windows, no sunroof, headlights on with key out. But a reconditioned becm sorted...

Hi datatek thanks for your reply. It was a reconditioned one I got fitted. I'm using launch diagnostics and I can see all my wheel speeds on the live data all matching same kph.

Hi I'm new to this. I have a similar year p38 doing the same. No abs faults on diagnostics or dash. Abs light goes out when you drive. Reconditioned becm fitted from Callrova based in UK. Any suggestion. Was having lots of problems electrical and becm cured nearly all of them. I'm down to the...