Here is a problem I have with a 1995 impreza. The check engine light never came on during the time I had it (7 years). Even when I take out a cam or crank sensor, no CEL. Any other Subaru gives a CEL with that. The CEL light is working, I see it when the ignition is just before starting (to check all the bulbs). I thought maybe there is a code in the ECU, I have a OBD2 reader. I cant find a OBD2 connector, so it is probably a OBD1. I connected the 2 green plugs together (diag plugs?) and switched on. I see no blinking light but I hear many relais clicking on and off in a weird rhythm. Also, both cooling fans switch on and off about once every 2 seconds. Anybody knows whats going on here?

 

Thank you very much in advance.

You should try and find the black diagnostic connectors. They are the connectors you need to connect to try and pull the codes. There's info on pulling the codes on my site.

 

That is very weird the light is not coming on when you disconnect sensors. I wonder if the wiring is messed up, or if the ECU has an issue.