ABS is drawing 410ma with the car off.

[nrubenstein]

So, to my surprise, my battery drain issue is NOT the stereo equipment, but rather something in the ABS system. If I have the module plugged in, the drain is 430ma, with it out, the drain is 20ma, which, for some strange reason, I find a lot more desirable.

I've tried swapping modules, but that makes no difference at all. Any suggestions on whee I should go from here?

For reference, I have one of the late '89 cars that got the relay free ABS system that is normally associated with the airbag cars.

[nrubenstein]

Apparently, writing that out and thinking about it answered the question. For the record, the issue was that I'm stupid and wired it into constant on power when I did the swap. For some strange reason, that matters.

The car now draws 20ma with the ABS module wired into the main relay harness.