Check engline light won't come on nor a few others after swap

[wrxn240]

I did a SOHC to DOHC and wired the 5 wires from the ECU body harness connector to the body harness and now my check engine light plus a few others won't come on. Replaced the guages to DOHC ones also. Problem with wiring, faulty guages, burnt out lights? How do I find the source of the problem?

[FRoSt415]

check with a test light to see if you have current going to the gauge cluster. if not there is no power going to them and check the ecu more for a problem with the wiring to the ECU and body harness.