Engine not cranking

1993 CADILLAC DEVILLE
72,000 MILES • 4.9L • V8 • 2WD • AUTOMATIC
Avatar
GREGORY JONES
  • MEMBER
  • 1 POST
When I turn the key all it does is click and the lights come on. Also, the security light keeps blinking. what is stopping my engine from starting?
Mar 30, 2022 at 9:05 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

If it only clicks, it could be a weak battery, poor connection between the battery and starter, or the starter motor itself.

First, confirm the battery is properly charged. Follow this simple link to load test it:

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

If that tests good, then confirm the battery cables are tight and clean, free of corrosion.

If they are, then I need you to check for power at the starter motor. You will need a helper for this.

At the starter, there will be a heavy gauge wire that has 12v at all times. Also, there is a smaller gauge wire that is purple. It should only have 12v when the key is in the start position. Have a helper turn the key to the start position while you check for power.

If there is power, the starter is the likely problem.

I attached the wiring schematic below for your review and reference. Also, here is a link you may find helpful:

https://www.2carpros.com/articles/starter-not-working-repair

Let me know what you find or if I can help in any way.

Take care,

Joe

See pics below.
Mar 31, 2022 at 12:32 PM
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.