>>25050168>pls tell me how to do, would love that on my own
You need to run a wire (a normal 10amp house wire is what I used, since it doesn't carry much current) from the cigarette lighter over to the heater relay, such that the heater relay is energised and feeds power to the blower motor when the key is turned to ACC.
Do NOT try to power the blower motor directly off the cigarette lighter, it will just blow your fuse and burn the wire. And even if it doesn't, it's still retarded because it will reduce the potential power output of your cigarette lighter if you're going to power shit off that outlet.
On a RHD camry (i'm in Australia) the heater relay is located behind the grey plastic cover on the far left side. I had trouble finding it at first. I think I took the entire fuse panel off, cut the appropriate wire and just used a crimp connector to splice the wire in. Same thing for the cigarette lighter end of the wire.
I've had this "mod" installed for about a year now, and it justwerks.