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The check engine light is not controlled by a relay, the bulb is grounded directly by the engine computer.
Horn relay in engine compartment by the PCM
The Fuel Pump Relay is at position 3 in the engine bay relay plate
The main relay will give an check engine light to indicate that the electrical system is bad.
Normal operation to cool engine Relay stuck in closed position?
It means that your relay is out, and has to be replaced with a new one, and once its been replaced, your check engine light will turn off in about 20 minutes or so.
Check the fuse box in the engine compartment
The relay is in a block of relays on the left side of the engine compartment just back of the air cleaner. The relay cover should tell you what position the fuel pump relay is in.
Check the craigs list listings in your area. Look it up on google
Check for continuity coming from the switch from the "start" position. If it is good, then the starter is defective, or a loose wire somewhere around the engine.
You can find the wiring diagram for a relay position for a 1997 Mercury Sable in the owner's manual. You can also check local auto stores.
Depending on the engine, check coolant relay and temp sensor that triggers that relay
The blower motor relay switch in the Honda Civic is located at the center of the engine closest to the firewall. The relay is engaged when the ignition is turned to the on position.
check your two fuse boxes one is between your passenger door and the dashboard and the othe is located in your engine labelled engine relay center
Check voltage and plug on your fuel pump relay. Also check the relay (while the engine is running) for heat. Might be a bad ground???
i think its just in front of cylinder #2 sticking out of the aluminum part, right above the timing belt relay
It is possible that a Subaru Check Engine Code #12 is a bad starter switch. This is usually the starter relay switch malfunction code for Subaru.
Check fuse. If good then check if you have power to motor (just need a 12 volt test light) If there is power then need fan motor-if no power check the relay. power to relay then you have found the problem. Relay is in the engine compartment on pass side of firewall. 95% of time the relay is out
try the fuel pump relay in the engine bay. check wiring schematic for locations. swap with a/c relay or other same style relay to rule out a bad relay.
Check the blower relay, it may be getting stuck..............
The engine computer via a relay.The engine computer via a relay.
The fuel pump relay, is controlled by the EEC module, which provides power to fuel pump under various operating conditions. When ignition is in "OFF" position, EEC power and fuel pump relay contacts are open. After engine starts, power to fuel pump is supplied through fuel pump relay. EEC module senses engine speed and shuts off fuel pump relay when engine stops.
It is in the fuse/relay box, in the hood compartment.
check the relay
P1491 Rad Fan Control Relay Circuit