1998 Cadillac Deville Charging system

1998 CADILLAC DEVILLE
Avatar
RAY28750
  • MEMBER
  • 2 POSTS
Electrical problem
1998 Cadillac Deville V8 Two Wheel Drive Automatic

over the past year this cadillac has had 3 alternators replaced. i feel there is an electrical problem but were do i start looking
Mar 1, 2010 at 11:23 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Is the battery going dead? If so, have you checked for an electrical draw? Are you purchasing remanufactured alts? Have you tried a different brand of alt?
Mar 5, 2010 at 3:16 PM
Avatar
RAY28750
  • MEMBER
  • 2 POSTS
Yes i have one thing this car has a system installed 2 1600 watt amps two 15" wolfers. I tried to find a capacitor for the sysytem but had no luck do you think that can be an issue also ahen i checked the alt i found the plug had been cut and the p terminal wire is missing only the f terminal is there. it is a 5 wire plug with only two wires i am trying to find a schematic for it
Mar 8, 2010 at 4:31 AM
Avatar
VIRGIL SHELTON II
  • MEMBER
  • 4 POSTS
I have 02 deville, what I believe is my problem, and maybe yours, alternator goes bad after volt regulator stops working because it's controlled by the Pcm. My alternator is new and it's pushing out 15v boiling my battery... Volt regulator fail... Pcm
Apr 25, 2019 at 10:03 PM
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Thanks Virgil for the info. Unfortunately, it looks like this original post was almost 10 years ago but this is good info. These post (obviously) stay up so that info will help others with this issue.

Appreciate it.
Apr 29, 2019 at 4:39 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.