Help! Turn signal problem

Help! I have a 2003 Dodge Caravan and the turn signals and running light will not work when the headlights are on??? Any ideas?

Your Caravan has what’s called an Integrated Power Module.

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This module controls all the functions of the exterior lighting.

Looking at the wiring diagram, this would the be first component I would suspect to be causing the problem.

Tester

I put a fuse in the fog lamp and it worked and then it stopped working

Those lights are also controlled thru the Integrated Power Module.

Tester

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The multifunction switch is common to both problems.

What is a malfunction switch? and where is it?

It’s on the steering column.
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If the lights you are talking about do work when the head lights are not on then I suggest you check the ground to those lights for a bad connection.