Mt wife was almost home on Friday when the brake, Battery, TCS and ABS
> lights all came on and the speedometer stopped working. I turned the
> engine on today and all the same lights came on, but I did not want to
> risk taking it out of the driveway to check the speedometer. At one
> point the engine hesitated, the radio went silent for a split second
> and the battery light extinguished and stayed off. After turning the
> engine off/onagain all the lights were back on again.
>
> Any help here? It should still have the 100K, 10 yr warranty, but if
> it is just time for a new battery, I can save the time and just get
> that, unless it is also covered in the warranty. Maybe someone knows > about that, too.
Sounds like the alternator to me. I know that if the alternator goes out, both the battery and the brake lights will come on...its wired that way...don't know why. Don't know about the TCS, ABS, or speedometer, but the alternator is the place to start. Quite a job on the 2002 XG350. Get it to a dealer for some warranty work. If it failed just as the car was getting home, and if you only started it one time after that, your battery should be almost fully charged. We drove 50 miles to get the car home after our alternator failed without any problem. Just keep all electrical stuff off... No radio, headlights, A/C, heater, etc.
Dan