The starter relay on a 1990 Pontiac Sunbird is typically located in the engine compartment, mounted on the firewall or near the battery. It's often situated in the fuse box or relay center. To locate it, you may refer to the vehicle's service manual for specific diagrams and details.
On a 1990 Chrysler New Yorker, the starter relay is built into the starter. The starter is located on the front of the engine, behind the engine mount.
Postive battery cable should connect to the starter relay (solenoid)
in the fuel tank
where is the starter relay located on a 1990 Lincoln mark 7
Its located on the outside of the wheel well, behind the oil bag... a wire runs from your starter directly to the relay, which is a small inch squared black box.
Look at the rear lower section of engine - follow the + battery cable
under the car, passenger side, up around the exhaust.
dead battery bad terminal connections starter relay
Its located by the fuse panel under the dash on the drivers side on the left. You'll see a little green box that says starter relay.
underneath the engine compartment fuse box on passenger side
Find the positive battery terminal. Follow the thick cable from that terminal and it will lead to the starter solenoid.