excessive resistance offered somewhere in circuit chances are you can remove the bulb spray the socket out with some electrical cleaner or contact cleaner then reinstall the bulb screwing ti in and removing a couple time to rub the contacts clean if that doesn't work it's somewhere in the wiring harness.
Often times when I start the car I don't have an interior fan... then three starts later (or some...
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Often times when I start the car I don't have an interior fan... then three starts later (or some random number) it works. The heat works,but without a fan to blow it is pretty difficult to warm up the car or de-ice the windshield. Any ideas would be greatly appreciated. I also noticed yesterday when I tried to put it in 4wd (Hi or Lo) the light would flash 5 times and then go off... so now I can't put it in 4 either.