How do I add fog lights to my 2001 Toyota Avalon XL?

It can be done, although not cheaply. The first thing to do is check behind the location of the lamps and see if the connectors for the fog lamps are there. If not, it may not be worth your while to install them as a lot of wiring would have to be done. If the connectors are there, you will need a fog/headlamp switch (about $175), a relay, a fuse, and the light assemblies. The assemblies basically snap into place as does the switch after you remove the column surround. Then you add the relay and fuse in relay box 1, install the lights and plug them in, and the system should work. Oh, did I mention I would recommend getting a professional?

Hope this helps! God Bless!

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