Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer. Your best bet would be to tap into the cargo lamp at the cargo lamp itself. You can't tap into the switch because the switch is a multiplex style switch and cannot supply the 12 volts needed for the bed lights. Give me a minutes to look up the wiring diagram and I will tell you the color of the wire at the cargo lamp.
Ok, found it, it is a White wire with a Tan stripe. If you remove the left A pillar trim, you should be able to tap into it at the harness running up the left A pillar.
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Yes. Just follow that harness that goes up the left A pillar. Follow it down to the connector under the dash and tap into the White/Tan wire at that spot. But do not tap into the switch. The switch is connected to the BCM. Then the BCM sends the 12 volts to the cargo lamp.