The anti theft system in the 2000 Saturn LS1, thinks you're trying to steal the car sometimes. You have to wait ten minutes before the 'Security' light stops flashing. Once the security light is not flashing you can start the car. Trying to start the car with the security light flashing will either burn out your starter or deplete your battery!
No Crank, No Start Diagnosis - EricTheCarGuy
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Whenever you have a no start condition when attempting to start your
vehicle it's important to make the distinction between "no crank, no start"
and "crank, no start" situations as they are treated differently. This
video covers what I do when confronted with a 'no crank, no start'
situation and in this case it's a worst case scenario so be sure to watch
till the end.
Starter diagnosis video
No start basics video
Parasitic draw video
Click below and Stay Dirty
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Saturn Sl1 Start Issue help please!
My car stands me once every two weeks like this, if I wait a halfhour it
fires right up, note I pulled the body fuse as the door locks were
hammering and draining my battery at random.