Need fuse box diagram underhood for 2003 Nissan altima

SOURCE: need wiring diagram for 2007 nissan altima headlight

This is the service manual for a 2006 Altima - it may help.

http://rapidshare.com/files/51183743/2006-Altima.zip

SOURCE: Lost Fuse Box Diagram - Altima 2005 2.5L

i need to know what ENG CONT AND ENG MTG means on the fuse box of my 2006 altima.

SOURCE: no low beam head lights

If you just want to replace the bulb yourself, this is a good website.
http://www.paulstravelpictures.com/Nissan-Altima-Headlight-Bulb/Nissan-Altima-Passenger-Side-Headlight.htm
If the website does't get your headlight fixed... You might have a blown fuse. It could be in the IPDM E/R location under the hood. This is next to the coolant bottle. Remove the coolant bottle with two screws and lift the cover to the IPDM E/R. Just set the coolant bottle aside for now. The low beam fuses are 49 and 50. They are 15A fuses. To be more precise, they are located on row 2, columns 2 and 3 (column 1 being closest to the fender of the car). Hope this helps.

SOURCE: I need a 2005 Nissan Sentra Fuse Box Diagram!?

the diagram should be on the outside or inside of the fuse panel cover. Not there? You can go to autozone or advance auto and look at there books for free, or you can ask them to print it for you. If you're not happy with that you can stop at a nissan dealer (used) and look at one of their 2005 models, or ask them to help. They will try to get you to trade in though lol.

SOURCE: Where is the Fuse for my cigarette lighter

In the junction box, usually to the left of the steering wheel. Labeled (generally) courtesy or cigar.