93 Bonneville SSE-ECC is a no go

[danfrain]

HI.

My 93 Bonnie sat with a dead battery for a couple of weeks. Now that it's all charged up, the ECC display is just three lines across the middle of the screen (- - -). It's done this before but resolved without my having to do much. I don't recall now how I did it.

I've tried the ECC diagnostic procedure (Press and hold OFF and WARM simultaneously). No codes, no change, no nothing. It seems there was a reset procedure, but now I can't remember what the heck it is.

WHat should I try? I've gotten a lot of help in the past by asking for it, so I'm hoping to make good things happen again.

Thanks in advance.

Dan