my friends supra is not starting(turning over). it got the right battery thats charged and when u put the battery terminal on the alarm goes on right away and the only way to shut it off is to unplug the viper alarm under the dash. when u turn the kay the car does not turn over and i dont have a clue wat it could be

i have an 87 and it did the same thing, pull the alarm fuse under the hood, ill go take a look on mine and tell you exactly where its at and what to do. im pretty sure it says alarm/radio im not exactly sure, ill get back with u in a bit