1990 Century V6 no power, won't start

[elevator]

The power would cut off, then I would jiggle the positive battery cable and the lights would come on. I would start the car and drive off. That worked all the time, but today the jiggling does not work. The lights won't come on and the car won't turn on. Does anyone have any suggestions?

[tempfixit]

clean and tighten the battery posts and the cable ends, replace if necessary.

[elevator]

Thanks for the quick reply, I went out the next day and tried it again and it started.
I will tighten the cable at both ends like you suggest. Thank you again.