Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › No Tail or Tag lights.. but brake lights work
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January 16, 2013 at 5:13 am #493379
Hello.. I have a 99 lincoln town car.. today i have no tail lights or tag lights.. but turn signals and brake lights work fine… any suggestions????
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January 16, 2013 at 6:16 am #493407
I’d check the easy stuff first…the fuse and the bulbs. If they’re fine you’ll need to verify you’re getting voltage to the back. Do you have a multi meter or test light by chance?
January 16, 2013 at 6:34 am #493422yes i do… but if it was the fuse.. i dont think the brake lights would work?? am i wrong? 4 lights wouldnt have gone bad at the same time.. so i know the bulbs are good
January 16, 2013 at 6:40 am #493424I don’t know if you regulary check bulbs, l/p lights go out a lot, think of all the cars you see at night w/o them. Anyways I’m not sure on that vechile if the fuses share circuit or have their own dedicated fuse. I would check them eitherr way. I would check if you have power to the socket, use a meter, that way you know what your voltage is. And let us know. Have you driven through any high snow or anything lately?
January 16, 2013 at 6:42 am #493426Ill see if I can find the socket diagram or wire color for you.
January 16, 2013 at 6:57 am #493428Looks like after your light control module it splices down to the l/p lights. Seems to be brown from module on.
Just to be clear the arrows on the bottom right flow into the bottom diagram, both sides are the same.
January 16, 2013 at 11:52 am #493471old cop trick. do your dash lights work and front markers? if your front markers and dash lights work but tail lights dont its not a fuse. and yes the parking/tail/LP lights are on a separate line as stop/turn/flash.
January 22, 2013 at 3:31 am #494836Brake lights and turn signal lights are in a different circuit than the brake lights so you can’t go by that. The question now is, do you have lights in the front? If so then there is likely a problem with just the rear, if not then you may have an issue with the parking light circuit. Don’t complicate this though. Be sure to check the bulbs, it could be as simple as that.
January 22, 2013 at 3:56 am #494847is that on all cars or just the ones with separate turn signal bulbs or his particular ride?
January 29, 2013 at 2:07 am #496563[quote=”Lord Ihcalam” post=46472]is that on all cars or just the ones with separate turn signal bulbs or his particular ride?[/quote]
It’s on all cars that I’ve seen. They do it for safety. This way if there’s a failure like the one described you’ll still have one or the other. It’s also done because you don’t want to put too many loads on one circuit. Lights are a pretty heavy amp draw so you don’t want to run too many of them on one circuit.
January 29, 2013 at 3:10 am #496598ahh so the single wire thing must be a trailer design only.
February 2, 2013 at 1:52 am #497907It has nothing to do with a trailer connection or not. Lights are high amp circuits. When designing an electrical circuit you need to make sure that the wires and connections can handle the load. In addition as I stated you don’t want all your lights on the same circuit because if just one part fails you would loose ALL your lights. Better to have some lights than no lights at all.
February 2, 2013 at 2:22 am #497942so if my turn signals stop working i will still have brake lights, and if my brake lights stop working i will still have turn? Other than the bulbs blowing of course. but thats good to know.
I dont know much about vehicle wiring, i can barely wire in aux lights or a CB radio (i dont consider stereo instals as wiring since they all have kits now and are plug and play for the most part) so plz forgive me if i annoy you with basic questions
February 6, 2013 at 8:52 pm #499641[quote=”Lord Ihcalam” post=47986]so if my turn signals stop working i will still have brake lights, and if my brake lights stop working i will still have turn? Other than the bulbs blowing of course. but thats good to know.
I dont know much about vehicle wiring, i can barely wire in aux lights or a CB radio (i dont consider stereo instals as wiring since they all have kits now and are plug and play for the most part) so plz forgive me if i annoy you with basic questions[/quote]
No. In truth the turn signals and brake lights use the same filament in the bulb. They are on different circuits up to that point however.
It would be better to say that if you lost your tail lights your brake lights and turn signals should still work.
February 7, 2013 at 6:19 am #499895Eric how are you.. sorry for the delay… all lights ont he car work except tail and tag… the whole back of the car is dark… but when i hti the brake they al lights up and my turn signals work… checked all fuses and bulbs.. fine
February 14, 2013 at 1:08 am #501825You need to first start with a wiring diagram and then do some testing from there.
http://www.bbbind.com/tech_database.html
Basic Electrical troubleshooting 1
Basic Electrical troubleshooting 2
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