Well this is an interesting one..

Out of no where my left turn indicator (front and rear) is coming on when I apply the brake. Not flashing, just constant on.

Checked all the connections at the bulbs front and rear, also checked wiring on my trailer light harness. All fine..

Got any other ideas?

The turn signals and hazard's work normally with brake not applied.

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2003 limited 3.7L V6
Vader Edition

http://www.cardomain.com/ride/3219059

I do not trust trailer wiring harnesses too much....may be worth disconnecting for a while.

But I have also personaly seen problems like this caused by bad grounding at the relevant bulbs.
Try temporarily adding a section of wire from a good clean chassis point to the earthing points on those left-side bulbs and see what happens.

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2002 Export CRD 2.5 Sport