door locks and alarm goes off on its own

2002 PONTIAC BONNEVILLE
14,000 MILES
Avatar
.D1801
  • MEMBER
  • 1 POST
2002 Pontiac Bonneville Electrical Problems, door locks work on there own, alarm sounds on own, speedo sometimes reads 120 mph, when going 60
Dec 7, 2011 at 10:10 AM
Advertisement
Avatar
DRCRANKNWRENCH1
  • ✓ASE Certified Mechanic
  • 3,435 POSTS
  • ASE Certified Mechanic
You may have a ground problem. I am giving you the 2 ground diagrams that have the grounds you should check. Look for corrosion and a good tight contact to bare metal.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Dec 7, 2011 at 11:03 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.