[StingRay]

Use a tee for the sender and oil line. Get a no gauge under dash harness and pull the wire that would normally run to what is now the empty idiot light in the fuel gauge of a gauge cluster that is a used light in the non gauge cluster. There are empty pin locations in your gauge harness that will accept the no gauge idiot light wire and the trace is on the flex circuit to that location. Do the same with the under hood harness. You can then use that indicator light as a check engine light. I installed the idiot light sender into the other head and tee'd the oil pressure and temp senders to that same light. It is ground activated by either of the two senders. If the light is on I look to the temp and oil pressure gauges for a problem.