I have a 94 accord lx no v tech. I had a error code 12 which is the egr valve i clean the ports and bought a used egr valve from a. Junk yard..
Now the cel light stays on but when i turn the head lights or day light running lights on it goes off wtf is the problem now .the car is running super smooth again but that tham light is bodering me...i took of
F the battery and recoonected it to reset the code a couple of times now

 

Is it still throwing code 12? What does it do when you jumper the SCS connector?

It's behavior with the headlights; I'm wondering if some other short circuit is just triggering the light.

 

No i turns off when i turn of the day lights so i guess its no throwing any codes , with the jumper connected it stays on thats all

 

OK, with the jumper connected it stays on... that means there's no codes stored.

The CEL bulb is always supplied with battery voltage. The ECU closes the ground side of the circuit to light it up. So... Something ELSE is making a connection from the unpowered side of the lamp, to ground.

Check connections behind the cluster? Look for wires rubbed thru to metal? I don't have a wiring drawing for 1994 so I can't say what color wires go to that lamp. The powered side of the lamp probably doesn't have it's OWN wire, because lots of lamps are switched on the ground side.