Originally Posted by dee004
Anyone know where to disconnect the wiring to the daytime running lights so I can re-route it to a set of supper bright LED's? 05 F250 6.0 CCSB
Yeah, not quite that simple.
There are a bunch of relays and a resistor involved in order to do all the switching and dimming involved.
Probably your best bet would be to pull DRL Relay 3 in the BJB under the hood. Jumper terminals 87a and 30 in the socket so your high beams still work, and then use terminals 86 (hot) and 85 (ground) to power your lights.
Relay 3 (coil side) is fed by 15A fuse F27 in the CJB under the dash, that should be plenty of juice for your LED's.
Schematic is attached for the '06.