Most commonly, this is caused by a stuck relay on the RCM. Yank the RCM and send it to DJ for reworking, he replaces all suspect relays and reflows the bad solder joints, etc.
There is NO WAY the issue can be anything other than a stuck relay. The only alternative is that the output transistor on the ECU that pulls that relay in, is bad. So far, in 12 years here, I've not seen that happen.