stop looking for a particular fuse - turn ignition to reds and test all fuses with a test light - power across both ends = good fuse
-some will be powered with ignition off - some may not be powered at all at this stage eg.tail light on with light switch.....
if vehicle is fully optioned with memory seat check seat memory operation key off
turn ignition on check if mirrors dip at all when vehicle put in reverse.
note.mirror switch on seat deactivates/activates mirror dip function if pushed and held for approximately 2 seconds or if quickly pushed will deactivate/activate for current drive cycle only....this is a seperate control of the mirrors instead of the mirror switch itself !
remove right door trim CAREFULLY ! disconnect mirror switch while holding trim up or mirror switch can be broken when wiring pulls on switch - dont pull switch out while trim still fitted can damage mount - with ignition on reds check with test light for +ve power at violet with red trace and earth on black wire at plug for mirror switch - if you have power and earth suggest new switch (unusual for both mirrors to fail at same time )
if no power /earth at mirror switch -with ignition on reds
behind door trim attached to mirror switch is a control module part of memory seat system - on some models this can be disconnected and the plug connected directly to the mirror switch for testing - if not possible check input side not switch side of module wiring for power and earth if power and earth suggest new mirror memory module........