EB1 Fairmont. Air con works however no warm air for the cold mornings. Checked the vaccum hoses 2 black and one green. One black and one green connected however other black is not. This is in the right hand back of the engine bay. According to the manua1 the unconnected one should be connected to the vaccum tank. This I understand however where the hell is the vaccum tank on these things? Cannot see anything like it anywhere. Any advice where too look. ?