How do I get the reverse lamps to work?

Wire harness in trunk. : Toyota Camry Common Electrical ...

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Ground wire coonection for tail light Camry 1999. All the lights ( license plate, tail,reverse) that are connected to the trunk are not working.... 1999 Toyota Camry.
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Two possibilities. The head light switch or the turn signal switch. All the exterior lights run threw the turn signal switch. I am assuming you already checked fuses.

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:-----

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

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

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

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

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SOLVE YOUR 4 WAY FLASHER RELATED PROBLEMS HERE

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

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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

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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.

Then you need someone who can,like a repair shop

{: ) Looks like your lightings got haywired. Have you had vehicle repairs recently? Anyway, it seems that you have poor grounding connections for the affected lightings. Some circuits share common ground, and ground terminals are strategically distributed on the vehicle. If these grounds don't have good contact with the body, chassis, or engine ground, circuit functions are badly affected. Thats why these ground points should be inspected and kept clean and tight, maintain that good wire and terminal contacts.
We can start with G100 located at the Left Front of the Engine Compartment on the left front body mount. See diagram below:


Check out also G401 which is located in the chassis harness, mounted to the left rear Body mount. This ground point is shared by the rear lamps like the brakes, reverse, and rear signal lamps.
If possible check also other ground points that you may visually come across while on your search. Be sure also that fuses are all inspected good.
I hope we get lucky in finding and fixing a certain lamp function, if not all. Goodluck.

Likely there is a short circuit in the bulb socket of one of the bulbs that does not turn on

check the rear lower bulbs, if good nore than likely brake lamp switrch on brake pedal, 3rd lamp rns of separate circuit

located on the firewall panel on the left side of the floorboard on the drivers side

Double check all the lights. Pay close attention to the reverse lights and all the turn signal lamps. The reverse is the most commonly over looked. Have some with you while checking these lamps to confirm. Also check rear licence plate light. Failing that unplug a bulb, any (the easiest), with all the running and headlights on. Plug it back in and check warning light again this my reset it.

You have a bad earth or dirty bulb holders on your turn signal lamps Think the fuses in RH footwell right under dash