I installed an aftermarket (sony) head unit into my sister's 2003 corolla, and a few days after the install, the odomoter backlight stopped working. Checked the fuses, found one was blown, and replaced it. Checked a few minutes later, and it was blown again. Later on her tailights stopped working... I have no idea what's happening. Advice? I'll fill in more details later.
nvm, found out what was wrong