So, I want to enable DRL's on my '01 Lightning. I read the technical article on f150online.com and the howto on svtlightnings.com. However, neither article has the missing information: what is the part number of the DRL Relay Block? I gather that needs to be plugged in under the dash (instead of the loopback plug), but I haven't figured out how to obtain one.

Thanks in advance for any help!

Samuel