Brakes lights work but tail lights do not work or front running light do not work
Your Tail Lamp/Park Lamp system is pretty easy to check. ayou can check to see which part of the system is failing by checking for power and ground at the socket for the tail lamp relay. The tail lamp relay is located in the driver's side junction box under the left side of the dash. It is the relay that is second from the bottom at the far left.
To check the circuits, you just need a 12 volt test light. Remove the relay and do the following tests:
Connect one end of the test lamp to the battery NEGATIVE post. with the other end probe pins 1 and 5 of the relay connector. Both of these pins should have power (light your test light) at all times. If they do not, or if one is hot and the other one is not, the problem is most likely in the junction block itself.
Switch your test lamp lead from the battery negative terminal to the battery POSITIVE terminal.
Probe pin 3. Your test lamp should light, but may be a little dim. This is the circuit through your tail and park lamps to ground. Your park lamps should also light dimly when you do this. If the light does not light at all, then you need to check for a blown fuse at the 10 Amp "TAIL" fuse located inside the drivers side kick panel fuse block. If this fuse is blown, you will need to trace your tail and park lamp circuits to find out where they are shorting.
With your test lamp still connected to battery positive, probe pin 2 at the relay connector. This connector should not do anything until the headlamp (combination) switch is turned on. When it is turned on, your test lamp should light. I am not absolutely certain, but you MAY have to turn the ignition switch on to get this to work. This circuit is actually grounded by the body control computer, and the service manual does not say if it will work without the ignition on. If your test lamp does not light with the light switch turned on and the ignition switch on, then the problem is either the light switch, the body computer, or the wiring in between them. You will need a scan tool that can read live data from the body computer to find out if the body computer is receiving the signal from the headlamp switch. If you have not located the cause of the problem at this point, I would recommend getting with somebody that has the proper equipment to diagnose your computer system.
Sep 26, 2011 |
2002 Toyota Camry