Have two keys, both were working with no issues. About 2 weeks ago when it got really cold, I'd insert a key, turn to start, and nothing would happen for about 5 seconds. Then the cluster warning lights would come (as normal) and then it would be able to be started. Today, when the key is turned to start, nothing. No cluster warning lights, no start, just that damned PATS light blinking steadily. Either key does the same thing. I searched, couldn't come up with much other than one fella had his start/run relay replaced at Ford. Before I drag it to the shop tomorrow, anything else I can try? I did hook the forscan up to it but it says it can't connect. Not sure if that's a side effect of the PATS locking things out or what... And to really shit on my parade, my Explorer has a head gasket leak. None of my other vehicles are licensed, the one that does otherwise run needs diff work and isn't safe to drive.