If you're looking to save some money and replace your headlight connector yourself, here's what you need to know. Depending on the type of car you have, the cost of the replacement part will vary. For example, a headlight connector for a Toyota Camry will cost around $15, while one for a BMW 3 Series will set you back about $50. As for the tools needed, a basic socket set should do the trick.
Assuming you're starting from scratch, the entire process should take no more than an hour or two. And when all is said and done, you'll have saved yourself some money and gained a little bit of valuable experience in the process.