Theft light blinking car won't start

cyatesm04 · December 20th, 2011, 03:06 AM

Okay guys so today I left my headlights on and the battery died. I hooked the battery up to a charger and charged the battery. When I went to start the car the Theft light keeps blinking and the car won't start. I researched that and it seems to be a PATS problem and one thread suggested using another key. I tried using my spare with no luck. I tried disconnecting the battery for 10 minutes and trying again still the same thing. I also tried flashing the ECU back to stock and still no luck. Does anyone have any ideas?

clutch_breaker · December 20th, 2011, 03:20 AM

Remove the +/- cables and clean the contacts really well? Will the car jump?

cyatesm04 · December 20th, 2011, 03:26 AM

Just left the battery disconnected for about 30 minutes and she started right up. I'm not sure what happened, but she seems to be fine now.

stephen · December 20th, 2011, 08:47 AM

Might not have anything to do with it but I always disconnect the ground cable from the battery when I charge it to isolate the car's electrical system from the charger.

wolfhound · December 20th, 2011, 01:47 PM

Yea I've had the same problem a couple of times if my Stang sits for more than 4 days. What happens is the security system draws enough power to drain the battery to where it won't start. You have to disconnect the cables to charge it up unless you want to leave it hooked up to the charger for about 24 hours lol. I'm thinking about investing in a get security system from the aftermarket that uses less of a draw from the battery

xtreme 2 · December 20th, 2011, 01:50 PM

glad you fixed it, whatever you did...

December 20th, 2011, 03:06 AM	#1
cyatesm04 Regular 2004 Mustang 17.391 @ 83.41 Join Date: Sep 2010 Location: Abingdon, VA Posts: 217 iTrader: 1 reviews	Theft light blinking car won't start Okay guys so today I left my headlights on and the battery died. I hooked the battery up to a charger and charged the battery. When I went to start the car the Theft light keeps blinking and the car won't start. I researched that and it seems to be a PATS problem and one thread suggested using another key. I tried using my spare with no luck. I tried disconnecting the battery for 10 minutes and trying again still the same thing. I also tried flashing the ECU back to stock and still no luck. Does anyone have any ideas? __________________ Current Mods: K&N Cold Air Intake Flowmaster 40's True Duals SCT w/ 93 Tune Avital 5303L Alarm and Remote Start 7" Jensen Flip up Monitor 2 12" Kicker CVR12D4 Subs 800 watt Kenwood Amp

December 20th, 2011, 03:20 AM	#2
clutch_breaker Regular 2003 Mustang GT Join Date: Aug 2010 Posts: 111 iTrader: 1 reviews	Remove the +/- cables and clean the contacts really well? Will the car jump? __________________ "I live my life a quarter-mile at a time. For those sixteen seconds or more... I'm free." Last edited by clutch_breaker; December 20th, 2011 at 03:29 AM.

December 20th, 2011, 03:26 AM	#3
cyatesm04 Regular 2004 Mustang 17.391 @ 83.41 Join Date: Sep 2010 Location: Abingdon, VA Posts: 217 iTrader: 1 reviews	Just left the battery disconnected for about 30 minutes and she started right up. I'm not sure what happened, but she seems to be fine now. __________________ Current Mods: K&N Cold Air Intake Flowmaster 40's True Duals SCT w/ 93 Tune Avital 5303L Alarm and Remote Start 7" Jensen Flip up Monitor 2 12" Kicker CVR12D4 Subs 800 watt Kenwood Amp

December 20th, 2011, 01:47 PM	#5
wolfhound Newbie 1999 35th Anniversary 3.8 Join Date: Dec 2011 Location: Kansas Posts: 29 iTrader: 0 reviews	Yea I've had the same problem a couple of times if my Stang sits for more than 4 days. What happens is the security system draws enough power to drain the battery to where it won't start. You have to disconnect the cables to charge it up unless you want to leave it hooked up to the charger for about 24 hours lol. I'm thinking about investing in a get security system from the aftermarket that uses less of a draw from the battery __________________ BBK Cold Air Intake Computer Reprogramming Fiberglass Front Fenders All black LED taillights Smoked headlights Bigger and Better things to come!

December 20th, 2011, 01:50 PM	#6
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	glad you fixed it, whatever you did... __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

December 20th, 2011, 08:47 AM	#4
stephen Hardcore Enthusiast Join Date: Feb 2007 Posts: 1,262 iTrader: 0 reviews	Might not have anything to do with it but I always disconnect the ground cable from the battery when I charge it to isolate the car's electrical system from the charger.

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