We think that a car's headlight is the key point in your car's appearance; headlights are like the "cool-guy" or seductive glares your car gives out when it is out on the road. Good headlights attract attention at night, like you're saying: "Move over, cool car coming through." However, this coolness can only last for so long; soon enough your headlight assembly will experience problems. To help you out during these times, we talked about the common problems with your Ford Mustang headlight cover below.
You may think that seeing deformations (which are simply referred to here as "bubbles" since they look like bubbles) on the headlight cover is normal since it's near heat. That may be true, but headlight covers are designed to be able to tolerate a certain amount of heat from the headlight bulbs. If you find bubbles on the cover, then you need to take a look at the entire headlight assembly. They can be caused by two things: (1) the cover is too close to light bulb, meaning the cover is too exposed to heat than it was initially meant to; and (2) the bulb emits beams that are too hot for the cover. You may have bulbs that are incompatible with the cover; some bulbs emit beams that are too hot, which can or cannot be handled by your Ford Mustang headlight cover.
You may also experience a day when you notice that the headlight cover is fogged up, causing the light to be dimmer. Headlight covers are typically not bolted on completely; there is always a space allowance to allow proper condensation of air and heat. In simpler terms, the cover assembly is still open to allow the bulb to breathe and not be sealed off. Condensation buildups are normal so it is not something to worry about.
Noise coming from the headlight assembly, which is sometimes accompanied by excessive shaking, is a result of it being too loose. Though we said that the assembly needs to be a bit loose to allow proper condensation, we emphasize that we used the phrase "a bit". The cover still needs to be secured in place to avoid noise or too much space for movement, which can damage the other parts of the assembly.