My son, who is very mechanically inclined sent me this:

So the instr lights in my RAV4 went out and while doing some research and trying to find out why, I came across this helpful post from a woman on the Toyota repair forum….thought u guys might enjoy.

“It is a good idea to check your battery. This is typically a black box about the size of a 12-pack of Coke and it is usually stashed under the hood. It should have two thick cables connected to it. If the battery is missing or if one of the cables has become disconnected or broken then this could give rise to the problem you are experiencing.”
S