A while back I posted to this site about my '97 LHS cooling fans not cutting in when they were supposed to. Checked everything, fans, relays, connections etc. nuthin'! The problem is that the Factory Service Manual (FSM) diagrams show only one sensor sending a signal to the "computer" (control module) which in turn controls both the signal to the relays and the dash guage (gage). Since the guage showed a rise in temp, it seemed reasonable to assume that the engine sensor was working correctly.
In desperation I finally ignored that and replaced the coolant temp sensor on the engine anyway and, presto, the fans started cutting in again the way they're supposed to. My problem is now fixed and maybe someone else can benefit from the experience. It only leaves me with one nagging question. What controls the guage on the dash???
-Hank