The brake light on the back of cab works, but the ones in the tail light do not.
Sep 19, 2017 at 10:15 AM
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JDL
CAR REPAIR CONTRIBUTOR
16,098 POSTS
In the diagram the top wire is voltage, the bottom one is ground. Use a test light and check them both, voltage and ground.
Image (Click to enlarge)
Sep 19, 2017 at 10:34 AM
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