I replaced all the exterior bulbs in my 2013 F250 6.7L with LED bulbs. My trailer lights work but brake and signals don't work on the trailer. Thoughts?

 

You replaced all the exterior bulbs on your 2013 F250 with LED bulbs. That's what! Not all LED bulbs are direct replacements for the OEM bulbs. Regretfully

They're bright, cool, and use less power, but some just flat don't work.

 

Have you trouble shot the trailer lights or the connector at all to be sure everything is functional on/to the trailer?

 

Does the BCM need to be flashed?

 

Well they're bright and lag forever--that's why I replaced them. The TRUCK lights work perfectly. The running lights on the TRAILER work, but not the TRAILER brake/signals.

 

I'm not clear. Were the trailer lights working before you replaced the bulbs on the truck? Normally the problem is simply the connection at the seven pin. Did you check that?

Steve