Dave Swingle has the stock door lock circuit diagram at the link Martin points out. The stock circuit has several current leackage paths, so I don't think the stock module has a zero draw potential. A couple examples of leackage paths in the circuit include: - Path from +12 through R12 through D5 through "lock doors" lamp - Path from +12 through R2 through D through door switch Just these two paths should draw about 10mA or so each. Knut --- In dmcnews@xxxx, Martin Gutkowski <webmaster@xxxx> wrote: > In theory, zero, in practice it'd be a tiny amount because no components > are perfect. Mainly because of the capacitors used to fire the relays - > no capacitor has a perfectly infinite DC resistance, and after 20 years > can be less than desirable. This is why I replace the capacitors on all > modules I rebuild. > > http://www.dmcnews.com/Techsection/doorlocks.htm > > Martin > #1458 & #4426 >