Stewart Warner is perhaps the most recognized name in vehicle instruments in the U.S. automotive industry. The brand dates back to 1905 when John Stewart founded the company. Stewart brand speedometers were first used on original Ford Model Ts. The company then established itself as a market leading supplier of other instruments including the gas gauge. If you notice your car is running out of gas sooner than usual, it may be that your gas gauge needs to be replaced. This is because your gas gauge is not correctly measuring the gas that is in your tank.
Raise the hood of your car and disconnect the negative battery cable. This will ensure your safety in that there is no electricity flowing through the vehicle while you install the gas gauge.
Locate the access cover for your gas gauge sending unit. Raise the trunk door and lift the carpeted mat. Unscrew the cover to expose the gas gauge sending unit.
Unscrew the gas gauge sending unit with a screwdriver. Lift the sender out of the vehicle.
Position the gauge over the gas sender hole on the car. This is where you will be mounting the gauge. The gauge cannot be mounted inside the vehicle.
Cut a 2 5/8-inch diameter hole in the top of the tank. Secure the gauge in the hole with a retaining bracket, lock washers and #8-32 nuts.
Apply force to the mountings screws using a 6-inch pounds torque screwdriver.
Connect one end of the 18-gauge wire to the negative terminal and the other end to the engine ground which is near the oil pressure sender.
Connect the 18-gauge wire to the positive terminal and the other end to a switched +12V source.
Use an 18-gauge wire and connect the S or sender terminal to the signal wire from the oxygen sensor. You may have to refer to the specific instructions in your vehicle’s manual or a dealer for oxygen sensor hookup directions.
Connect one of the light wires, a white one, to the dash lighting circuit or to a +12V switched circuit. Connect the light, black, wire to the chassis ground.
Double-check all connections. Connect the negative battery cable and test the gas gauge.
