You may just have a door switch that is bad if they don't come on when just one door opens, if they don't come on at all it may be a bigger issue. If one door, test for continuity through the switch with door open
See the guide below on using a volt meter to do this
https://www.2carpros.com/articles/how-to-use-a-voltmeter
The wiring diagrams for your interior lights are attached below
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Sunday, November 18th, 2012 AT 3:39 PM