Having just acquired my Sportrak I have noted several minor electrical problems. The passenger side door would not activate the courtesy light whereas the drivers side door activated the light without any problem.
Although this is a simple problem I thought I would contribute the 'simple' fix as I have already posted a question about my brakes! The courtesy light bulb is connected directly to the 12 volt supply, (via both the Dome Fuse - under the drivers dash and the courtesy light switch - on/off/door), and once the other side of the lamp is earthed, (grounded via the door switches), the lamp lights!
I was impressed with the solidity of the door switches and the fact they have a substantial rubber seal placed over the top of them to deter the entry of water. The switch is threaded and screws out, (with the help of a spanner but I have forgotten the exact size at this time), and the cable passes through the sill and out the other side, (under the vehicle), via another substantial rubber grommet!
The cable, (red/white), then joins the main wiring loom that follows the main box section that runs parallel with the sills. The fault was due to the cable having been previously repaired, (no plug/socket between the wiring loom and the switch), and the cable had become disconnected. Unfortunately, and more worrying, (for ALL Sportrak owners), the inner conductor, (leading back to the loom), had perished and I had to cut right back to the loom to locate the copper conductor. I soldered a length of cable between the switch and the loom and sealed the joins with heatshrink sleeving.
All is now fine with the courtesy light!