i took the interior out and put it back in.
I don't seem to have any dash board at all anymore. No tach signal or any guages.
If I jump the data unit to the test port under the hood I have a tach signal.
I just recently bought the car and can't be 100% sure what worked. I am 95% sure the stock tach did work. But now nothing. And definitely no signal at the dash.
Any idea what to check.