ABS light on and no tach reading

[theref]

I cannot find the thread but when last I posted I had a shifting problem due to a shop sending a rookie out to pressure wash the engine bay to get rid of the fuel smell resulting from a leaking injector hardline. Found my old mechanic and he found a small leak near the ALDA. Shifting problem gone.

Now I have a problem with a constantly on ABS light. This started with the light being on intermittently. I noticed when the light was on the tach stopped working and idle gets rough. Now that the light is on all of the time, I get both of those symptoms as well. Just changed alternator,belt, spring tensioner and dampener. The ABS symptoms were there prior to these changes.