94 Jeep Grand Cherokee Laredo: All rear lights work except the left tail light. Bulb is good. No voltage seen at first connector in left rear panel. Assume next major connector is under the back seat. Also assume no SINGLE fuse for this line. New radio installed about same time this occurred but can't swear it was the exact same time.
Traced the problem to the Lamp Outage Module located in the rear left quarter access panel behind the spare tire. Arcing had occurred on the left taillight line. Fortunately this part is readily available at your local Jeep recovery yard (none available in the U.S. from dealers). Recommend J& W Auto Wreckers in Antelope, CA (web site available). Massive number of Jeeps and fair prices. If you don't want to replace the LOM then you can join the two connectors that go into the LOM (LOM is optional) but you'll always show a lamp failure on your console.
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