Hi Justin,
Thanks for the reply. The lights are still on with the horn fuse in place. Originally, I was just going to pull the fuse and leave the relay in place to stop the horn from sounding. I did that and was walking away from the truck when I noticed the tail lights on. The only way to get the lights out was to pull the relay. So, I left the fuse in place and pulled the relay. I might add with the relay out, the lights function normally ie. turn signals, tail lights activating with the headlight switch etc.
One thing I can check is if the lights are on with both the relay and fuse in place. I suspect "yes" but I will double check. It will have to wait until the AM. It is just after 2 in the morning here and with the horn sounding, I will give my neighbors a break. Thanks for your time.
Rob