on my w124. the car sat for 3 yrs with periodic cranking . A couple of weeks ago I cranked it using jumper cables mistakingly crossing the posts for just a touch. Corrected that and fired up the engine but the abs light was on and the tach didn't work. Several people on the forum suggested the ovp fuse. I replaced the fuse and the ovp now the light is off but the tach still doesn't work. Any other ideas on why the tach does not work?Bye the way, the fuse was blown in the ovp
thanks in advance