Many items are actually unfused, and you always have the problem of someone making/adding a modification (like some audio equipment than is wrongly still "on" with the key "off"). It could be something in the alternator, but I'd check other things, too -- like the door marker lights staying "on" with the doors closed, or the overhead panel light being switched "on" (it is so dim that "on" vs "off" isn't really different ). Remove the large two-prong "e" power connector (with the two huge red wires) from the fuse-relay panel while measuring this parasitic current draw -- this will let you know if it is something associated with the fuse-relay panel or not. If it isn't something on the fuse-relay panel = then I'd lean towards the alternator or a user modification. If it is something associated with the fuse relay-panel, plug the e connector back in and then unplug each of the a, b, c, w, k, j, x, y connectors one at a time to further narrow it down. If the connector giving the trouble has some obvious added modification, that would be a clue . On my TR, when I disconnect the battery to install the meter to measure the parasitic current, this resets the added CD changer so it goes into its self-test wake-up mode and draws ~3 A for 20~30 secs IIRC, but then the parasitic current draw drops to 65 mA. Yours isn't changing as much, but the fact that it is changing again points to something added IMO.