I cleaned all the terminals, and took the battery down to be charged. They said the battery was bad so I purchased a new one. The cars started right up, but the preglow light on the dash still didn't come on. I then drove the car down to get the alternator checked and it was good. I have a Haynes manual and it says that if the preglow light fails to come on it can be in the instrument panel or the in the preglow relay. Is this a common problem?