wiring check

See if they wiggle. If so clean and solder. I told you earlier, or tried to. Figure a better way than continuity checks. WHY? Because very low resistance, such as switch contacts and wire terminals, and connectors, are very hard to evaluate with continuity. Much better is to learn to use VOLTAGE DROP UNDER LOAD

Consider a VERY simple circuit--a 2 cell flashlight, spread out on a bench, 2 cells, a switch, and the lamp. Here's what you have

At ground to the shell, you have the spring terminal at the battery negative, either 1 or 2 trouble spots right there

Between the two cells, 1 more connection for trouble.

The connection from the battery + to the lamp, yet 1 more trouble possiblility

The connection from the lamp shell to the switch, yet one more trouble point.

Finally, the switch ground to the shell--making a round circuit

EACH 1 of those trouble points, PLUS the possibility of 1 or 2 bad / poor/ batteries, as well as the switch contacts, all "additive" trouble.

Imagine this all laid out on a "breadboard" circuit, with everything accessible.

The lamp is dim, maybe intermittent. How do you find? Pick a spot, such as the battery +, and move your VOLT meter probe along each point. Wherever there is drop, there is a problem.

For example, if you put one probe of the meter on the battery + of the two, and your other probe on the - next to it, there is nothing there except the connection of the two batteries. If it is corroded, dirty, loose (not enough pressure) you will measure more drop, the worse it gets.

Obviously, measuring across each cell will show the drop in voltage under load, and here, you want MORE V instead of less, showing that cell is in better condition/ charge.

THE FACT IS that with VERY LOW resistance circuits, resistance / continuity checks can really REALLY get you down the wrong road.

They are good for a "quick check" if you are looking for say, a bad lamp bulb, and such. But when you really get to digging into things, I rarely use resistance.