alternator sensor? i know i got my power wire hooked up and i have a voltage booster so i know i hooked that up. i dont think it would reach the low coolant sensor. i'm at my girlfriends so when i go back to my moms which is where i work on my cars i'll check. i'm pretty sure tho that its kinda round maybe 2 or 3 wires going into it. if you look at ur engine and you have the big wire harness that has ur injector plugs etc, follow it to the end all the way to the passenger side and its the last plug u can use. its frustrating. i have errands to run so i'll spend another 5 minutes trying to figure out where it goes and if i cant find it i'll take a pic on my phone and see if i can post it on here.