Taillights not working properly

2008 JEEP GRAND CHEROKEE
100,000 MILES • 4 CYL • AUTOMATIC
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LOW_LOW96
  • MEMBER
  • 1 POST
Okay, so, when my lights are off my brake lights taillights and turn singles work but when I go and turn my lights on at night, I don't have any power in the back. I don’t know where to start. Could anyone help me?
Jun 13, 2022 at 1:13 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

I need you to check something. Using a voltmeter or multimeter, with the headlamp off, confirm there is 12v. Then check it with the headlamps on and see if it still shows voltage.

I attached the wiring schematic for the exterior lights (minus the headlamps) below for your reference.

Do this and let me know what you find.

Joe

See pics below.
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Jun 13, 2022 at 8:20 PM
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