[V8] Grounding Problem

[michael.a.flynn at us.army.mil]

Here's an idea, Remove the dash pad. Turn ignition on and press on the yellow connector behind the IC. Perhaps the bell will chime and the temp and
 fuel gauge will come to life. (worked for me)Is close to being behind the tach, almost between the tach and speedo. Might want to remove the IC and clean all 5 diff plugs. I was having the same problem. Hope this works for you.

Mike Flynn
90 V8 
97 A6Q