2nd Gen 4Runner Heated Mirrors
Started on my heated mirror experiment :
$15 heated inserts from eBay

First step was to get the mirror apart, there is a screw on the bottom of the mirror that will allow you to get the motor assembly and mirror out from the housing

Assemble your chosen weapons:
Is this case a wide putty knife and plastic pry bars worked for separate the mirror from the mount

I trimmed the heated insert slightly

No pics but I drilled a couple of holes in the mount to allow the power wires for the heated insert power and remountEd the mirror with some 3M tape
There is a small screw you can remove disassemble the the pivot point on the mount

Remove that screw in addition to the 3 bigger screws on the bottom of the housing, this will allow access to feed your wires through.

I went ahead and added a high power LED for a signal

Should be pretty bright
So I threw the mirror in the freezer with some water on it for a couple of hours and went to grab some dinner with friends.

Hooked up the battery charger set to two amps

After about 3-4 minutes

I have an extra defroster switch that I might use or just wire them into the rear defrost circuit.
Am happy for an experiment they seem to work OK