Well for what its worth here are my comments/questions.
What fuse did you replace 4 times?
Not all circuits fed by fuse are listed in owner's manual and yes there can be errors. I have '97 wiring diagrams and they are not error free either.
My wiring diag shows either 60 or 80 ABS fuse depending on type of ABS but doesn't say which is for which. I have 60amp in both cars, don't know which ABS system I have, but have had no problems todate.
Heater blower requires 2 fuses to work. One is feed to motor I referred to in earlier post, the other is feed to controlling relay. This latter fuse feeds other circuits (signals, back-up)
Have you had heater resistors replaced yet?
You have now answered my earlier, why a pain question, thanks.
Since you have dealer involved we'll wait for further post.
Edit: p.s. If I was trouble shooting this one I would pull blower relay out of dash fuse panel to isolate that circuit, exterior lights are more important.
