Surges seen with lights at night

Tiny
DMG0808
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 157,000 MILES
I notice while driving with the headlights, they will surge brighter and then go dim for no apparent reason. The dash lights also seem to slightly dim too. Tried changing out the starter with no change. Do you have any ideas. Battery seems fine, starts with no hesitation on first crank of key.
Do you
have the same problem?
Yes
No
Tuesday, January 3rd, 2012 AT 3:08 PM

9 Replies

Tiny
RASMATAZ
  • MEMBER
Have the charging system checked out-start here
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 3:21 PM
Tiny
DMG0808
  • MEMBER
We took it to Auto Zone and the scanner showed nothing wrong with the starter or the battery. No codes came up on their scan-tool.
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 4:19 PM
Tiny
RASMATAZ
  • MEMBER
Have the alternator checked
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 9:17 PM
Tiny
DMG0808
  • MEMBER
I am sorry, I just noticed I said we changed the starter and had the starter checked. That is incorrect! They checked the alternator and it checked normal but we changed it (the alternator)anyways.
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 9:43 PM
Tiny
RASMATAZ
  • MEMBER
Could be the computer controlled circuit of the alternator field generation is malfunctioning
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 10:38 PM
Tiny
DMG0808
  • MEMBER
Hi Again,
So in plain lay-man's terms- how do you trouble shoot this or know if it is the Computer-controlled circuit of the alternator field generation. And do you have a diagram, schematic of what you are referring to? I have no idea what all that means. Could you please explain this in further detail? Thank you.
Was this
answer
helpful?
Yes
No
Wednesday, January 4th, 2012 AT 8:04 PM
Tiny
RASMATAZ
  • MEMBER
See below-you might probably replace the computer if the wiring from the alternator to computer checked-out good
Was this
answer
helpful?
Yes
No
Wednesday, January 4th, 2012 AT 8:24 PM
Tiny
DMG0808
  • MEMBER
Hi Rasmataz,

See below where? I don't see a diagram or where you are talking about? Could it be a bad ground or corroded wire somewhere? Thanks.
Was this
answer
helpful?
Yes
No
Thursday, January 5th, 2012 AT 12:01 AM
Tiny
RASMATAZ
  • MEMBER
One more time on diagram
Was this
answer
helpful?
Yes
No
Thursday, January 5th, 2012 AT 10:22 PM

Please login or register to post a reply.

Recommended Guides