Anyone know what wire, if any, that I can use to bypass the POS Anti Lock Brake Control Module. It's done and I would at least like to have a speedometer. I know the wires from the rear diff are the green/yellow green/white. I just need to know what two wires come out and go to the ECM or Speedometer such that I can just bypass the engineering fail.

thanks in advance... Rob W

 

What year is your truck? At one point, Dodge (Ram....) got vehicle speed signal from the drivers front wheel speed sensor.

 

I have an oscilloscope on order so I can check the feeds into the module. What I need to figure out is if the signal is passed though to the ECM from the Anti Lock Control Module such that I can just bypass the module. There isn't that many wires going to the anti lock module, so maybe I will figure it out when I can test. Also, I went to ebay and have an entire unit coming that still has the wires attached (they didn't pull off the connector; just cut the wires). If that alone doesn't work, then I will get the oscilloscope out and measure the inputs and outputs until I find what I need.

It is a 2008 Ram 2500HD 5.7L 4 door SLT

 

You need a service manual for your truck.....

 

Turns out it was the Anti Lock Module; I replaced it with a used on and all is good.