Flasher resistor reads far below 330 ohms with bulbs fitted: that's normal

When checking the 330 ohm, 7 W resistors on the backbox flasher circuits, a resistor can read much lower (about 85 ohms here) with the bulbs in and the full 330 ohms with them out. The resistor sits in parallel with the flasher bulbs, so the meter reads the filaments too, and parallel resistances always measure lower than either part alone. Pull the bulbs (or lift one resistor leg) before judging the resistor.

Systems

• Williams System 9

Games

• Comet

Related tips

• LED flashers glow all the time: disconnect the flasher warm-up resistors

Source: Pinball Repair help group!! (Facebook group)