How to Install an ABS Relay in a Nissan Maxima

To ensure proper braking, you have to change the ABS relay in your Nissan Maxima when the ABS warning light is lit on the driver control panel display. It is usually impossible to stop a car that has a malfunctioning ABS relay as the relay controls the entire anti-lock brake system.

Instructions

1

Park the Maxima and set the parking brake. Open the hood and secure it using the safety bar. Disconnect the black negative battery cable by loosening the nut on the clamp around the battery post using an adjustable wrench. Pull it up and set it away from the battery.

2

Remove the quarter panel trim under the steering wheel by unscrewing the screws on both sides of the panel with a Phillips screwdriver. Look for the black protective box marked ABS. Remove this protective box by unbolting the four bolts using a 8mm hex socket. You should see the black relay.

3

Unplug the wiring harness from the bottom of the relay by pressing the buttons on the side of the harness. Gently pull down on the harness while you are pressing the buttons. Once this is disconnected, remove the four mounting fasteners using a 8mm hex socket.

4

Place the new ABS relay in the place from which you just removed the malfunctioning relay. Secure it by replacing the mounting fasteners. Tighten them with the socket. Plug the wiring harness into the bottom of the relay. Replace the protective box and secure it by replacing the bolts. Replace the quarter panel trim and tighten the screws.

5

Connect the negative battery cable. Tighten the nut on the clamp. Close the hood.

6

Start the car. Look for the ABS warning light. If it remains off, test drive your car by driving slowly and trying to stop. If it comes on, you should take your car to a mechanic to service the system.