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No Tail Lights 2005 Mustang GT

 
Abbystang67
New User
Posts: 5
Joined: 03/09
Posted: 10/11/13 09:37 PM

All lights on car are working except the tail lights. When i turn the switch on dash for my tail lights they come on for about 1 second and then go off. And its both sides that are doing the same thing. Ive disconnected battery and reset.. did not work. the way they come on and go right off its almost like a relay but im told thats not a option since its only the tail lights that are not working... im needing ideas  

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waynep712222
User
Posts: 223
Joined: 04/13
Posted: 10/12/13 02:53 AM

oops..

the 2005 mustang uses conventional wiring 2006 uses computer controlled..

the headlight switch might be bad...

i posted the pin out so you can OHM the switch with it removed from the harness..



there is a chance that the contacts inside the headlight switch are bad..

you might try disconnecting the battery again.. and operate the switch a bunch of times.. this will sometimes clean the contacts as there is no current arcing across the contacts.. very little current is used ..  

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waynep712222
User
Posts: 223
Joined: 04/13
Posted: 10/12/13 03:15 AM

this is the diagram to test the 2005 mustang
headlight switch

0996B43f8023c15b  

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waynep712222
User
Posts: 223
Joined: 04/13
Posted: 10/12/13 03:46 AM

2005 seems to be a conventional lighting system not computer controlled..

2006 versions are computer controlled lighting..


if you have the headlight switch out..

tan and white strip wire is power from the tail light fuse to the switch

brown is tail light output from the headlight switch...  

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Abbystang67
New User
Posts: 5
Joined: 03/09
Posted: 10/13/13 05:42 PM

but i understand the license plate late and park lights on the rear quarter panels are on the same circuit yet they are working fine. its odd the tail lights come on for a brief moment and then go off  

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Abbystang67
New User
Posts: 5
Joined: 03/09
Posted: 10/13/13 05:42 PM

but i understand the license plate late and park lights on the rear quarter panels are on the same circuit yet they are working fine. its odd the tail lights come on for a brief moment and then go off  

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waynep712222
User
Posts: 223
Joined: 04/13
Posted: 10/13/13 09:48 PM

thats strange..


check the ground connections inside the trunk... center of the rear panel.. there are two studs with the ground wires on them..

test the grounds..

use a pair of jumper cables.. end to end.. layed on the ground under the car..

only having the NEGATIVE hooked up...  

turn the headlights on.. set digital volt meter to 20 volts DC...  measure from the ring terminals to the end of the jumper cable.. see what sort of reading you get..

should be close to 0...  0.02 or so..

or if your jumper cables end to end are long enough...

hook directly from the negative battery terminal to the ground ring terminals..

see if the tail lights come back on..


i have on other brands.. needed to tighten the contacts in the bulb sockets to grip the wires on the side of the bulb bases..

think chevy trucks and vans... where the brake lights are really dim.. and the tail lights are almost nil...




say.... did you change the light bulbs back there yet???

if not.. thats the first thing to ***

and.. if you are slick...

you might be able to go to a professional parts store and buy a box of 10 for a LOT less than you can for packages of 2..

that one might take a #4057 bulb.. as a stop and tail light bulb..  

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waynep712222
User
Posts: 223
Joined: 04/13
Posted: 10/13/13 09:55 PM

this looks like what might be your tail light socket..

140

power off..

tighten the grip on the bulb by the connectors by flexing them inward slightly..

then reinsert a new bulb..

you can check the sides of the bulbs for signs of burning where loose contacts have heated the looped wire contact..  

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