Trunk light cluster does not work

Tiny
EZZA
  • MEMBER
  • 2009 MITSUBISHI GALANT
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 203,000 MILES
The lights on my trunk are not coming on. I took a multi-meter and tested all the fuses in the engine compartment and the passenger compartment to see if one had blown, but all tested good. I tried to search the connecting wire to find any pinches or breaks with no success. Is there a magic fuse or a special place I need to look to resolve? I do not want to get pulled over for having no light on my license plate.
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Tuesday, September 5th, 2017 AT 11:42 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 14,487 POSTS
Looking at the wiring diagram I would bet on a broken ground wire as it is the common item among them all. They all use a black wire going to a ground mounted to the left rear seat metal. Lay in the back and have someone open/close the trunk a few times and watch the wiring. Look for the spot(s) that move the most. Remove the harness tape/loom and look and feel the wires. They can break inside the insulation and not be readily visible.

Easy way to test this would be to take a piece of wire, connect it to the black wire that comes off any of the lights and connect the other end to a ground. If the lights come on you just need to find the break in the black wire in the harness. Or run a new wire through the harness and up to the splice point for the grounds.
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Wednesday, September 6th, 2017 AT 11:48 AM

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