jlinde Posted March 16, 2008 Report Share Posted March 16, 2008 A friend of mine found a 99 STS last fall and it is having electrical problems. He got an extra computer and alternator with it without knowing the reason why. The charging is going up and down between 16.5 and 13.0 and there are some other warnings on the panel like change pads and service AC etc. I have all the books for the earlier 93-94 but I know very little about this 99. Where is the engine computer mounted? The extra alternator will be tested and put into the car later to exclude the problem with that or can a faulty pcm be the source? Are the diagnostic codes possible to display on the panel as in the 93? And in case can the codes be found (and explained) on the net? Help would be appreciated. / Jan L Link to comment Share on other sites More sharing options...
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