1983 Cadillac Deville alternator problems

Tiny
BALD_DRAGON721
  • MEMBER
  • 1983 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 89,000 MILES
This is the 3rd alter. In 1 1/2 weeks. The battery is new. The voltage was 14.5 before, then I noticed that the engine compartment light wasnt as bright. Rechecked the alter. And it showed 12 volts. After I turned the heat and the headlights on. The onboard diagnostic shows code 16. Noone seems to know what the problem is. There are no fusible links from the alternator, no fuses blown and an ammeter test was done and showed nothing. Neg. Ground wires were cleaned and checked.
Wednesday, December 19th, 2007 AT 6:23 PM

5 Replies

Tiny
BGLOCC
  • MEMBER
  • 3 POSTS
Do you have an aftermarket audio system in it?
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Thursday, December 20th, 2007 AT 11:49 AM
Tiny
BALD_DRAGON721
  • MEMBER
  • 3 POSTS
No everything in the car is still factory. The xmission is the only thing that has been replaced because it sat for a while. However. It was running fine before these problems happened.I just now replaced the connector that plugs into the alternator, started the car. Everything ran 14.5. I turned the headlights and the defrost on (i need those in the morning for work) rechecked the voltage again and it dropped to around 10.5-11 volts.
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Thursday, December 20th, 2007 AT 4:55 PM
Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
No everything in the car is still factory. The xmission is the only thing that has been replaced because it sat for a while. However. It was running fine before these problems happened.I just now replaced the connector that plugs into the alternator, started the car. Everything ran 14.5. I turned the headlights and the defrost on (i need those in the morning for work) rechecked the voltage again and it dropped to around 10.5-11 volts.[/Quote:bc6440a9bd]

where did you buy the parts at?
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Thursday, December 20th, 2007 AT 5:17 PM
Tiny
BALD_DRAGON721
  • MEMBER
  • 3 POSTS
No everything in the car is still factory. The xmission is the only thing that has been replaced because it sat for a while. However. It was running fine before these problems happened.I just now replaced the connector that plugs into the alternator, started the car. Everything ran 14.5. I turned the headlights and the defrost on (i need those in the morning for work) rechecked the voltage again and it dropped to around 10.5-11 volts.[/Quote:f64333f2e4]

where did you buy the parts at?[/Quote:f64333f2e4]

i got all the parts from autozone. The alternators have the warranty so ive been takin them back thinking that I keep getting bad ones
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Thursday, December 20th, 2007 AT 6:14 PM
Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
No everything in the car is still factory. The xmission is the only thing that has been replaced because it sat for a while. However. It was running fine before these problems happened.I just now replaced the connector that plugs into the alternator, started the car. Everything ran 14.5. I turned the headlights and the defrost on (i need those in the morning for work) rechecked the voltage again and it dropped to around 10.5-11 volts.[/Quote:bba48eac08]

where did you buy the parts at?[/Quote:bba48eac08]

i got all the parts from autozone. The alternators have the warranty so ive been takin them back thinking that I keep getting bad ones[/quote:bba48eac08]

there is your problem, autozone sucks for parts, go buy one from napa or the dealer, autozone is only good for fluids and such, you only get what you pay for, now your doing it a 4th time, sorry to say
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Thursday, December 20th, 2007 AT 10:50 PM

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