Hi All,
I am just about done converting 2005ish F-Series trailer tow mirrors with marker lights and turn signals to work on my 2013 Ford E-350 van. Not an easy thing to do but I'll try and do a write up shortly. I'm stuck on the last step - I ran wires down into the drivers side foot well area to tap into turn signal wiring but I cant for the life of me figure out which wires I can tap into. I guess worst case I can run the wires through the firewall and to the actual turn signal lights but thought it would be much easier and cleaner if I could find a source in the cab. Any ideas? Thank you so much!

I am just about done converting 2005ish F-Series trailer tow mirrors with marker lights and turn signals to work on my 2013 Ford E-350 van. Not an easy thing to do but I'll try and do a write up shortly. I'm stuck on the last step - I ran wires down into the drivers side foot well area to tap into turn signal wiring but I cant for the life of me figure out which wires I can tap into. I guess worst case I can run the wires through the firewall and to the actual turn signal lights but thought it would be much easier and cleaner if I could find a source in the cab. Any ideas? Thank you so much!

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