Battery Drain - ABS Module Ticking
 

I posted this at Escape Central too, hoping to double my chances of an answer.

My battery is draining while parked and I find it has a steady 0.6 amp draw. While under the hood, I noticed that even with the key removed, the ABS module is making a tic -toc noise with an accompanying pulse you can feel on the module surface. So, I suspect this is causing the drain.

Any ideas of what is wrong?

Re: Battery Drain - ABS Module Ticking
 

Just a longshot, but I'd try pulling the underhood relays one by one and see if the ABS noise stops. Iirc, there are six identical relays in a black box. Maybe one of them has failed closed. Gary G recommended carrying a spare relay for troubleshooting.

Re: Battery Drain - ABS Module Ticking
 

Thanks - did that (and carry extra relays). I did find that if I connect the battery directly (no ammeter) there is no ticking, so maybe I introduced an anomaly. I'll try pulling fuses one by one.