That's a similar situation I went through. I didn't have the power light flashing on my car when I bought it but the resistor had to have been on the way out as the light did come on.
When I did replace the resistor I noticed the 2-3 shift wasn't very good. The issue was hiding behind the bad resistor. I hate fixing one problem only to uncover another problem. It's great when it's eventually fixed though.
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