Recommended Posts

We bought this 2000 DeVille two years ago and it is our first Caddy. Wow! What a nice car to drive around in. About 3 1/2 weeks ago it just quit while my wife was driving at 35 mph. When I checked fuses I found a 15A marked IGN SW blown. It kept blowing in about 3 seconds BUT ONLY when I turned the key on. So I bought an ignition switch from Advance Auto and installed and problem solved... I think. A week later after driving about 20 minutes it started running roughly and lacked power. I was a block from my destination so I drove ahead. Nine hours later, I leave and it is running fine until about 20 minutes later and I am almost home then the same thing. The "service engine" light flashes when this happens. A couple of short trips...nothing. Always seems it has to "warm up" first, then...runs rough, lacks power and the blinking SE light.

 I have learned how to get the codes from the DIC and got 16, 7 of them current. I was told that I could disregard B0429 since nobody rides in the back seat usually. Here are the other six: P0300; P0446; P0741; P1381; P1860 & C0655. I read some other information and am wondering if I have a coil going bad?

Thank you in advance.

Share this post


Link to post
Share on other sites

It just went from bad to worse. We had just gone for a short drive to fuel up and as we were returning, the SES started blinking and the engine started running rough, so I backed in the drive and wanted to check the codes again and as I was shifting to park and setting the parking brake it just quit...died, dash lights went out...checked that pesky #29 fuse marked IGN SW and it was blown. So I pulled the new ignition switch, went to Advance Auto and got a defective replacement and a fuse box relay (the one like most of the smaller ones are) because I could hear additional clicking in the fuse box behind me and thought for $10, a trouble shooting relay might be handy. No fix. The fuse holds for key FOB operation and manual door locking/unlocking but after you turn the key on, within 3 or 4 seconds, the fuse blows again. I randomly, but methodically, switched out a couple of relays but nothing made a difference.

At this stage, I am about to have it towed to a dealer but I was hoping some knowledge here might save me a dollar or two.

Share this post


Link to post
Share on other sites

What you describe sounds like an intermittent short at the ignition switch or the wiring going to the starter.  The Starter on the northstar is in the V in the V8.   A continuity check between the starter terminal and ground would suggest a short condition. 


Bruce

2016 Cadillac ATS-V gray/black; 2013 Cadillac ATS 2L Turbo Premium (Wife's)

Follow me on: Twitter Instagram Youtube

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.