Park, Tail and Marker Lamps
The park, tail and marker lamps, including the license lamps, are turned on when the headlamp switch is placed in the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LPS fuse in the underhood junction block supplies battery positive voltage to the auto park lamp control relay switch contacts. The PARK LPS fuse in the underhood junction block also supplies battery positive voltage to the auto park lamp control relay coil. When the park lamps are turned on the body control module (BCM) energizes the auto park lamp control relay. Current flow is from the auto park lamp control relay to their respective park and marker lamps and to ground. Ground is provided at G101, G401
Just the back light's - tail lamps ,park lamps , sounds like a wiring problem or faulty connector . Viewing wiring diagrams an testing the electrical circuits is the way to find this problem . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size . Under system click on lighting ,then click on parking lamps under subsystem . Click the search button then the blue link's . Watch these videos an then test the electrical circuit for the rear park lamps .
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This is how a professional tech would go about diagnosing this problem .
SOURCE: No taillights, brake lights or turn signals
This is usually caused by a defective multifunction switch, see it quite allot, the clue is the 3rd brake light, it is on a separate fuse and does not run through the multifunction switch on the steering column.
SOURCE: 2002 jeep grand cherokee. Rear left brake light isnt working
The problem with your tail light is the housing is broken where the socket goes in. If you pull that socket out and look you will see the metal tap will be pushed down and the plastic around that will be broke. Easy fix is to replace the lens but you can get under the metal tap with a small flat tip screw driver and pull up on it very lightly and it should work for awhile.
Hope this helps
Cory
SOURCE: 2005 Chevy Colorado 2wd Brake Light Problems plz help!!
check the ground from the rear lights...
SOURCE: 1997 GMC Sierra p/u. Brake light & blinker out. Lamp & fuse ok.
you probably got the wrong bulb
those are usualy a different number higher wattage, they look exactly like an 1127 but are a 2027 or even a 3027 check the bulb base it has the number printed on it
SOURCE: 2007 Pontiac G6. Rear license plate bulb socket dead
park lamp and license plate share same fuse.check park lamp fuse.if fuse good you have ground wire problems.
Testimonial: "Thanks for the help! Not sure why the owner's manual doesn't mention that."
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