After replacing the battery and upon connecting horn is sounding?

Tiny
RROSENKRANZ74
  • MEMBER
  • 2006 FORD FOCUS
  • 150,000 MILES
Battery was draining out over a few days. The power windows are not all working. Replaced battery and upon connecting horn is sounding. Turning ignition key no power
Wednesday, October 18th, 2023 AT 10:30 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 44,416 POSTS
It sounds like you have a security system that is engaged. I would do a hard system reboot; this guide will show you how:

https://www.2carpros.com/articles/step-by-step-guide-performing-a-hard-system-reboot-for-your-vehicles-electronics-systems

This guide can help as well:

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please go over these guides and get back to us.
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Thursday, October 19th, 2023 AT 11:05 AM
Tiny
RROSENKRANZ74
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Tried those suggestions. Horn still sounds when I reconnect the battery. Annoying, I pulled the horn fuse. Still no power to ignition. Any other suggestions?
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Friday, October 27th, 2023 AT 9:43 AM
Tiny
KEN L
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Is the battery good, does it have 12 volts? Also let's check all fuses with the system on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

This guide can help:

https://www.2carpros.com/articles/car-battery-load-test

You may have had a voltage surge and taking out the GEM. we should do a CAN scan to confirm. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is the location of the GEM so you can check it out and replace it if a code comes up for it, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what happens.

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Monday, October 30th, 2023 AT 10:10 AM
Tiny
RROSENKRANZ74
  • MEMBER
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Link doesn't work.
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Monday, November 6th, 2023 AT 6:30 PM
Tiny
KEN L
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They are working for us, can you check again?
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Monday, November 6th, 2023 AT 6:31 PM

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