Originally Posted by mikeflys1
So far checking it out I had the interior light off and the megasquirt and its harness disconnected and theres still a pretty strong draw on the battery.
Based upon this quote, I assume you're using an inline ammeter? If so, it should be very simple for you to track this one down.
The room fuse, which comes through the Main and BTN1 fuses and is hot at all times, is pretty much used only for keepalive circuits- it's only a primary supply to a couple of things. It powers:
1- ECU keepalive, L/R @ pin 1A. (page B-1a)
2- Key reminder switch and instrument cluster keepalive, L/R at pin 1F. (Page C-a)
3- TCM keepalive (A/T only), L/R at pin AR. (page H-1)
4- Dome light. This is
a primary feed. L/R. (page I-3)
5- Radio keepalive, both normal and Bose (but not the amp), L/R at 1C (pages J-1 and J-2)
6- Power antenna. This is a primary feed. L/R. (page J-3)
7- The OBD-II connector, L/R (page U) Note that the old-style diag connector in the engine bay gets its power from the engine fuse.
Of all these, the power antenna seems like a very good candidate for a parasitic drain. If the limit switch has died, that tiny little motor will be trying to operate continuously.