Tail (running) Lights Out!

I just installed a new CD player in my 1993 pickup, which replaced the stock radio, and after getting it ALL put back together, I discovered my tail -- or running -- lights are not working! I checked the fuse, and it was blown. Bought a new fuse, and it blew the minute I put it in and tried the lights. I suspect it has something to do with either my wiring of the CD player, or I flubbed up the other wiring around the CD player when installing it (it was a TIGHT fit because the new player must have been just slightly longer than the original radio, and I had to shove a few wires back a bit in order to put it in. None of these other wires were bare or exposed, though...).

I own a Chilton Toyota book, but I looked on the electrical wiring diagrams and cannot find the lights ANYWHERE. Are they somehow linked to the radio/CD player? I don't want to have to pull the whole assembly apart again, but I may have to. Does anyone have any suggestions or know where I can look at an electrical wiring diagram that includes the tail / running lights??

Well, I think I know what I did wrong, after much deliberation and research. I think I messed up the ground to the tail lights when I installed the CD player. I'm going to rip it all out and start my wiring over. The only problem is I don't exactly know the wire colors and what they mean. I have a good idea I got from this website, http://tomclegg.net/toyotastereo

in the first posting of Feedback...

I'll post what happens next weekend, but if any of you have any suggestions, let me know!

Thanks!