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Will not start after new stereo installed

Tiny
STACIE ZITO HICKS
  • MEMBER
  • 2003 FORD MUSTANG
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 99,500 MILES
I just purchased the car listed above (CP) used. I removed the factory stereo and installed a new aftermarket stereo. Now my car will not start and I believe it is the anti-theft kicked in. My instrument panel does light up, and I have checked all fuses. I do have both factory keys and the key fob. How can I start my car without having to tow it back to the dealership and paying an arm and a leg? I know there has to be a sequence code to do this. Please help.
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Friday, February 9th, 2018 AT 6:02 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,480 POSTS
How did you install the new unit? Many vehicles use the factory stereo for more than just sound. In this case it does not appear to be used for anything other than sound. However, your no-start is because the instrument panel is out. It contains the circuitry for the key recognition system, if it does not power up you will not be able to start the engine.

I would probably start by unplugging the new stereo and putting the old one back in, then see if the dash comes back. It is possible the new unit is sending out a signal or is wired in a way that it shuts off the dash.
The first thing the dealer will do is see the aftermarket unit and tell you it is the problem, so you might as well find out now if it is (happens a lot on vehicles newer that around 2000).
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Friday, February 9th, 2018 AT 7:40 PM

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