Well I just went out to start my truck for the first time today and it will not start. Now I'm pretty sure its not the battery since I put in a new Optima about 3 weeks ago and I didn't leave anything running last night that would put a drain on the batt. Plus my alt. and starter are not even 6 months old yet. Went ahead and tried to pull the ECU codes but the check light on the dash keeps blinking really fast. This is my first time doing this so I'm not sure what that means. Cant jump start it either b/c no one can come help me right now. Any help would be appreciated.
Oh, btw I did wash my truck last night if that makes any difference.