Possible Alternator Issue

Bubs360

Well-Known Member
Joined
Feb 11, 2007
Messages
902
Location
New Hampshire
Car(s)
'91 Sentra SE-R, 2003 Triumph Speed Triple 955i
Car: 1988 Mercedes 420 SEL

Issue:

Noticed a very dim battery light with the high beams on. Under heavy braking, the battery light will often flash brightly right as the car comes to a stop. Tested battery, found that the battery was bad and replaced.

Still have issue. Interior lights slowly dimmed and then glowed brightly after hitting a bump. Very noticeable squeaking from the alternator. Tested output voltage, found it at 14.10V, drops to 12.60 (+/- 5 volts) with accessories and lights on.

Just wanted some opinions before I pull the alternator. Does the issue sound like the alternator or a loose connection somewhere?
 
Last edited:

Spectre

The Deported
Joined
Feb 1, 2007
Messages
36,867
Location
Dallas, Texas
Car(s)
00 4Runner | 02 919 | 87 XJ6 | 86 CB700SC
It sounds like you have a short or high draw somewhere (probably both), and probably one or more loose connections.

Edit: Also, check your grounds and the exciter wire, that may be part of the problem.
 
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