drt0800
Member
With engine running you can look at the tach and it's stuck at zero, look up at the road and back down and it's pegged at the top of the gauge. 30 seconds later it's in the middle then it will peg again or drop to zero. I've read all kinds of posts about the tach filter, resistors, sending the cluster away etc. What I never see is an explanation of how to test anything first. It all seems hit and miss. Since I received amazing advice to repair my AC, I was hoping someone could guide me with this problem. I have no codes displayed though I do get "SYS" flashing regularly. I was advised that it was due to the previous owner removing the factory Bose and replacing with a junk stereo.