Sorry for how late this is.............I ran into the finding a wiring diagram problem when I purchased my TL2300 with a burnt out wiring harness and had to replace the whole thing.......
What I ended up doing was ordering a parts manual that also includes a schematic and getting help from folks on here.
After I did all that and had it installed, I happened to look up at the underside of my hood............guess what was there.........a decal with the wiring diagram on it........anyway....hope this helps.....Dennis