[W126 Coupe] Problem 560
Dick Spellman
spell.yy at verizon.net
Sun Apr 30 00:14:51 EDT 2006
Hi Bellamy:
I am no 560 expert either. But, shouldn't that alternator be charging
north of 14 volts where the battery was dead? I'd maybe pull the
regulator and see what's left on the carbon brushes if that 560 has 120k
or more miles on the clock.
Good luck.
Dick
Mister McGoo wrote:
> All;
>
> I was asked to view a problem 1988 560. I have limited experience on
> anything newer than '85. (560)
>
> I was asked to bring a fresh battery because the battery was dead, and
> I had about half an hour to determinbe what the problem was. I wasn't
> successful. I'm stumped. And I ask for comments from 560 experts.
>
> Symptoms:
>
> The battery was flat dead. I jumped the battery and the car started
> fine. I disconnected the jumpers and it remained running. The
> voltage at the [dead] battery was 13.8v. Obviously the alternator was
> working.
>
> I warmed the engine up, tested the climate control, power seats,
> wipers, seat heaters, power windows, sunroof, power sunshade..... all
> working fine.
>
> The car had a 3/4 tank of fuel. It was idling for about 15 minutes.
> I drove the car around the block, accellerating smartly when I could
> (the vehicle wasn't licenced so I couldn't go far). Then I turned the
> headlights on and everything abruptly died. (The owner said, "oh you
> turned the lights on., That's what happens; the alternator is shot.")
>
> The battery still was dead. I jumped it again, the engine started
> fine, and I disconnected the jumpers. It continued to idle for about
> two minutes, then without anyone touching the car, the engine
> died abruptly again. This time, when jumped, the engine would turn
> over but wouldn't fire at all.
>
> The only possible abnormal condition is the idle speed was a bit
> high... around 1000rpm.
>
> Any comments, suggestions?
>
> -Bellamy
>
>
>
>
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