My 12 volt power socket does not work. The fuses are all fine and I tested the socket with a multimeter and it has no power, 1 day later the indicators stopped working. What could be the problem?

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with a multimeter test the voltage from alt to bat should be 14.2 volts test battery after a charge should be 12-13 volts not disconnect negative from battery and put your multimeter on fusable 10 amp and do a draw or drain test plug the black cable from the multimeter to the battery and the red cable from multimeter to the cable neg black on the car side cable unplugged from battery make sure keys are out of the ignition and the doors closed and nothing on in the car you should see .05 mv to .03 mv if you have more after a 30 mins test or 1 hour test then you have to find the drain on battery to find this you take out fuse at a time to see if it chages repeat not all the fuses at once 1 at a time

Replace the receptacle.

Either the fuse is popped or the power point is defective. Take a 12 volt test light (avail from any auto parts store for about $4) and touch the center of the socket it should light the 12 volt test light, make sure you have a good ground or the test will be invalid. If the socket shows no power then refer to the owners manual and locate the fuse for it, if that is ok you need the power point socket replaced. If you do not have an owners manual you can download one here.

Possible that the brake light pressure switch is faulty, wires snapped to the sockets. Trace backwards using a 12 volt test lamp or even a multimeter to get to the fault with the brake pedal pressed.

At this point in the diagnostic steps, the question: Is the problem with the outlet, or is it with the accessory being plugged into it. Just remember that I don't know if you have more than one accessory or that if you have tried any others. I hope this info helps!

I'm assuming you checked all the fuses -- they should be good, but in some cases, the right and left side windows may be on separate fuses.

The best procedure to find this problem is to start at the motor and work your way back to the power source (fuse box) testing each component to see if it is getting voltage.

If you fail to get 12 volts at either of these steps then the component leading to the one which failed to show 12 volts is bad.

First step is to test, with a multimeter, the motor leads for 12 volts when the window switch is engaged.

If you get 12 volts, there, then you should test the coil side of the window motor relay for 12 volts under same conditions.

If you get 12 volts there, test the window switch leads for 12 volts on both sides of the switch. You can also use the multimeter to test the window switch for continuity to see if it is passing current. If it fails the continuity test, replace the switch.

If you get 12 volts there, let me know and we'll take the next step.


I know this is complicated, but electrical troubleshooting is not simple.

More info, let me know.

Charlie

If you have access to a simple 12 volt test light, you can remove the bulb you replaced, turn on the turn signal and park lights and see if the test light lights up. If the turn signal contact blinks the test light and the tail contact lights the test light, you know your power supply to the bulb is good.
Next you will check the ground.
Using your test light, carefully touch the tail light contact with the test light tip and touch the test light ground to the socket ground. If the ground is good the test light should light.
Let me know what you find and we will go from there.
Regards,

get a test light (available at a NAPA, AUTO ZONE 12 volt test light) and while someone is pushing on the brakes you use the test light to see if power is reaching the socket and if it is not then you need to replace the socket also test the brake light switch behind the brake padel and if that is sticking that can also cause it to not work

Check the BULB socket to see if it has 12 volts when the brake is applied, test the ground at the socket as well, use a 12 volt test lite from Kragen or a store like it.