Have no tail lights. Can unplug harness and get 12 volts. When harness is pluged back in voltage goes away. When power is provided to light side of harness. Lights will work. ?????

Not for tail lights.
GeT a 12 Volt probe screwdriver with the handle that lights up or volt meter. Remove the bulb turn on tail lights clip to any good ground and put the probe tip on the bump at the bottom of the socket and it should lite up. Now clip ground to side wall of socket and probe both bumps in the center one bump is tail the other is brake. Have someone push on brakes and see if they light when on one bump then check tail on other bump. DO NOT TOUCH THE SIDE WITH CENTER PROB OR IT WILL SHORT BE CAREFUL. this will tell you where the problem is,

Also check fuse holder.
leave fuse in clip to ground turn on tail light and probe both ends of fuse for power.

Hope this helps Mike

TAIL LIGHT NOT WORKING

It can be faulty tail light bulb or its issue with tail light control switch or its wiring's are short.

Check the voltage at fuse slot of tail light.Do you receive 12 volt there.If not,then it says tail light switch is not receiving power supply.

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There are few help links related to your problem.I suggest you refer the list and check the help links.Click the link below:-----

Turn Signal Not working

http://technoanswers.blogspot.com/2012/11/turn-signal-not-working.html

----------

Right turn signal not working on Pontiac Car?

http://schematicsdiagram.blogspot.com/2011/12/right-turn-signal-not-working-on.html

--------

Only one side indicator light working on car?

http://schematicsdiagram.blogspot.com/2011/12/only-one-side-indicator-light-working.html

-----------

Turn signals not working on 1987 Jeep Wagoneer?

http://schematicsdiagram.blogspot.com/2011/12/turn-signals-not-working-on-1987-jeep.html

-----------

SOLVE YOUR 4 WAY FLASHER RELATED PROBLEMS HERE

http://repairhelpcenter.blogspot.com/2012/11/4-way-flasherturn-signal-flashersignal.html

----------

1994 Toyota Camry: Bypass Tail light Relay Circuit?

http://whatisbyme.blogspot.in/2012/04/1994-toyota-camry-bypass-tail-light.html

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2008 Toyota RAV4: Replace Tail light Lens Cover?

http://technoanswers.blogspot.in/2012/04/2008-toyota-rav4-replace-tail-light.html

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2003 Chevrolet S10 Tail light Fuse

http://schematicsdiagram.blogspot.com/2012/11/2003-chevrolet-s10-tail-light-fuse.html

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Chevrolet Parking light and Tail lamp light Wiring diagram

http://schematicsdiagram.blogspot.com/2012/11/chevrolet-parking-light-and-tail-lamp.html

----------

Car Tail Lights Not Working?

http://schematicsdiagram.blogspot.com/2011/12/car-tail-lights-not-working.html

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These details will help.

Thanks.

It can be faulty tail light bulb or its issue with tail light control switch or its wiring's are short.

Check the voltage at fuse slot of tail light.Do you receive 12 volt there.If not,then it says tail light switch is not receiving power supply.


---------
There are few help links related to your problem.I suggest you refer the list and check the help links.Click the link below:-----
1994 Toyota Camry: Bypass Tail light Relay Circuit? http://whatisbyme.blogspot.in/2012/04/1994-toyota-camry-bypass-tail-light.html

-----------
2008 Toyota RAV4: Replace Tail light Lens Cover?

http://technoanswers.blogspot.in/2012/04/2008-toyota-rav4-replace-tail-light.html
--------
2003 Chevrolet S10 Tail light Fuse http://schematicsdiagram.blogspot.com/2012/11/2003-chevrolet-s10-tail-light-fuse.html
--------- Chevrolet Parking light and Tail lamp light Wiring diagram http://schematicsdiagram.blogspot.com/2012/11/chevrolet-parking-light-and-tail-lamp.html
---------- Car Tail Lights Not Working?

http://schematicsdiagram.blogspot.com/2011/12/car-tail-lights-not-working.html

----------
Turn Signal Not working http://technoanswers.blogspot.com/2012/11/turn-signal-not-working.html
---------- Right turn signal not working on Pontiac Car?

http://schematicsdiagram.blogspot.com/2011/12/right-turn-signal-not-working-on.html

--------
Only one side indicator light working on car?

http://schematicsdiagram.blogspot.com/2011/12/only-one-side-indicator-light-working.html

-----------
Turn signals not working on 1987 Jeep Wagoneer? http://schematicsdiagram.blogspot.com/2011/12/turn-signals-not-working-on-1987-jeep.html

-----------

SOLVE YOUR 4 WAY FLASHER RELATED PROBLEMS HERE
http://repairhelpcenter.blogspot.com/2012/11/4-way-flasherturn-signal-flashersignal.html

----------
Thesedetails will help.
Thanks.

You could be dropping the voltage across the switch at the break peddle

Yes, you need to of course check the voltage coming into and going out of the brake light switch, if 12 Volts are there going out and coming in while pressing on the brake pedal, your brake lights aren't getting a good ground or there is a break in the circuit between that switch & the lights.

On occasion the tail lights will work with a weak ground circuit where the Brake lights won't. Best way to determine this is to just hook up the 12 volt tester to the Brake light hot wire & there at the bulb ground, then in an area away from the bulb that has a good possibility of contact/ground.

Really that's it, if the 12Volts is getting to the bulb but it isn't lighting, if you aren't getting the voltage there and the brake switch is hot on both sides when pressed, the break in voltage will have to be traced from that switch to the tail light to find the problem.

good luck.

Have someone pull the bulb, and check for 12 volts as you press brake pedal, if no voltage, check the harness, make sure nothing in the trunk has interfered with the wiring.

you might have an open ground wire on your brake/tail lights .. when you apply the brakes then power would flow thru the brake light (not see ground) so would then provide power backwards thru the parking light (common ground open) to all the other things connected to the parking lights .. like the other parking lights and dash ... when you turn power on to those things (headlights on) then there is 12 volts on both sides of the light .. thats why the lights quit working ... if the missing ground is the problem then most of the lights that are improperly turning on should be at a lowered brightness level.. interesting problem .. its also possible to have a brake light bulb that has the common ground open inside or not making connection with its socket .. i would start by removing the brake lamps and see if the problem goes away .. if it does look for a broken ground or damaged lamp ..

u have to pull back the platic inside the trunk area.push the back seats forward the whole peice just held inplace with calmps.if its the side without the cubby hole then u should just be able to pull the top half of it back to reach. if u need me to explain better email me at [email protected]

You have to remove the access panel on the interior side of the passenger compartment to access that connector.. it's a simple procedure after you see the wire harness and bulkhead boot.

Use a 12 Volt test light at the tail light connector and see if power is present at the harness, this would indicate a possible defective bulb socket.