Intermittently not cranking over?

2003 CHEVROLET MONTE CARLO

146,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC

BFDDHANSEN

MEMBER
1 POST

Have the car listed above SS, sometimes it won’t start. I’ve installed a new alternator and starter and battery . Would the ignition switch be my next part to replace?

Feb 13, 2023 at 7:16 PM

STRAILER

✓Experienced Mechanic
55,256 POSTS

Hello,

The first thing I would do is use a test light on the trigger wire of the starter, have a helper hold the key in the crank position. If it lights up, you have a defective starter. If no power is present then the next thing is the crank relay in the main fuse panel under the hood, here is the location in the images below and I have included the starter wiring diagrams so you can see how the system works.

The guide should help as well:

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

Please check the images below and get back to me.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Feb 14, 2023 at 4:05 AM

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