[xj-s] Battery Warning flicker

I keep getting a battery warning lights that flickers on and off. But my
battery meter shows normal ALL the time. Any ideas out there?

Thanks,
Lee Miller
95 XJS coupe 4.0L

// please trim quoted text to context only

(snip)
I keep getting a battery warning lights that flickers on and off. But my
battery meter shows normal ALL the time. Any ideas out there?
95 XJS coupe 4.0L
(snip)

In hopes that your car does not have the alternator circuit changed from
the 1988-1/2 3.6L, I am offering the following: The “battery warning
light” is connected between the battery positive volts and the alternator,
via the ignition switch. When the ignition is “ON”, but the engine is NOT
running, the positive 12vdc, from the battery, and the negative ground
potential from the alternator, will cause the light to illuminate. As the
engine is started and the alternator begins making volts, and continues to
supply an increase of a positive 12vdc (which is, in effect, decreasing the
negative ground potential), the light will diminish in brightness
accordingly with the alternator increase. Once there is the condition of
the light having positive 12vdc on both sides of the light, the light will
extinguish. The light has the potential to re-illuminate, should there be
any differential of voltage on either side of the light.
When looking at the schematic for the Ignition, Alternator & Starter
systems for the 3.6L, a common connection exists between the wire from the
ignition switch to the battery warning light, and the positive terminal of
the Main HT Coil. There is also a common connection between the positive
terminal of the Coil and the Amplifier. These common connections have the
potential to provide a voltage differential to one side of the light, in
comparision to the other side of the light connected to the alternator. If
you have had any occurrences of noticing a slight “miss” during the engine
running time, possibly one of these leads are picking up a ground
potential, thereby changing the status of the light. Otherwise, I would
suggest that the alternator circuit (regulator or auxillary diodes) is
beginning to get faulty. Again, all of the above may not apply to the
4.0L.

Tex Terry, II
86 XJ-S Coupe V12 GM400 DANA 2.88
Franklin, PA USA

// please trim quoted text to context onlyFrom: Meredith Miller leermiller@mindspring.com