Replacing turn signal, headlight, & dimmer switch

Just received the (new) turn signal, headlight, & dimmer switch for my 2001 Tacoma SR5, 2.7L, Auto Tran. This senior hasn't the foggiest idea of what/how/where to start to replace this unit. Tried to search it on site but haven't made much progress. My Haynes Manual is a bit fuzzy. Not sure if I should attempt to work on it?

Would there be somebody here that would take the time to post the necessary replacement procedure or just tell me where to go? Any an all input will be very much appreciated. Thank you very much! SP

 

A bit of an update. New multi functional switch was replaced as directed. Original problem still exists, NO Low Beam, & NO High Beam Indicator Dash Light. However I have only high beams working as other passing motorists confirm. L & R Turn signals working fine. On & Off light switch work. Hope that this may help? Will take it somewhere an try to make further progress tomorrow on checking out the ground on LB. Thank you! SP

 

I'm an old senior too. Check uner the hood fuse box on drivers side, I'm pretty sure there's a fuse for the low beams.The hi beam indicator lighe will require removing the gauge cluster & changing the bulb.

 

Toyota does a wiring trick and lights the high beam indicator bulb by passing current through the low beam filaments. If both low beams are burned out then the high beam indicator will not work. Are you sure the bulbs are good? If so then you have to pull out the multimeter and track down a disconnected wire somewhere, most likely at a point before the wires split into left/right.