I'm working on a '92 mercury cougar LS with a 3.8
First, the tach is pinned.
Second, the speedometer does not operate now. The speedometer always was erratic but the tach always worked fine until now.
Any help is appreciated!
Fuse 9 HEGO what the heck is that? I never heard of it and I'm curious.
THANKS
JR
Its fixed for now. had to take it part but....
HEGO = heated oxygen sensor. So now I know what that fuse is for.