Why does the horn and lights go on and off when I connect both battery cables?

2004 LEXUS RX 330
120,000 MILES
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KSWITZER
  • MEMBER
  • 1 POST
I tried to install a new battery because the old battery kept going dead if I didn't drive the car for a week. I put on the positive cable and when I put the neg cable on it acts the same as if I pressed the panic button on the remote.
Jan 28, 2012 at 7:39 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
You are triggering the alarm when the battery is connected. You have to connect the cables and then shut the alarm off.
Jan 28, 2012 at 8:34 AM
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