· Free download
You can be sure that the manual you have to find the headlight relay is going to be free to download. It is there to help you and therefore it is not going to cost you anything to have your pc. You can find the information here that you are looking for and use it to answer any other questions that you may have with regards to the car.
· More experienced help
If you are not very familiar with cars anyway, having a manual with more writing on it than you have ever seen before in your life is not going to be much more neither helpful nor interesting. Is this is the case then it is going to be within your interest to ensure that you ask someone who is experienced with cars or is a professional mechanic as they are easily going to be able to find the headlight relay that you have been looking for.
You can be sure that whatever method you choose to do, you can find what you are looking for and ensure that you are going to have all of the help that you need and that is going to benefit you as much as possible.