New! Dark mode!

Browsing Pinside at night? Getting tired of all the white? Switch to dark mode using the button in the top right (or CTRL-B)!

(Topic ID: 7191)

How does one test a coil?


By Blackbeard

9 years ago



Topic Stats

  • 13 posts
  • 7 Pinsiders participating
  • Latest reply 1 year ago by RaoulJuke
  • Topic is favorited by 9 Pinsiders

You

Linked Games

You're currently viewing posts by Pinsider examiner.
Click here to go back to viewing the entire thread.

#7 9 years ago
Quoted from pintastic:

I think its 3-4 ohms

As a minimum, that's correct.

Power off.
MM set to measure resistance (ohms), so set your meter accordingly.
Put the black on one outside lug, the red on the other.
Doesn't matter which color on which lug, mix and match all you want. Put one on the center lug if you want and measure that. Doesn't matter. There is no way to damage your coil or your machine or yourself by doing this. (power off, remember?).
You are looking for a minimum of 3 ohms. If you can't get that reading consistently across the lugs, the coil is probably dead. It might be much much higher , even 25+ depending on the type of coil and it's use. Doesn't mean one is better than the other. It's just the way that particular coil is built. Just look for a minimum of 3 ohms.

If the power is off to the machine - unplugged - you can pretty much poke your MM around anywhere under the playfield and search for readings like this on coils and diodes, etc. You can't hurt anything even if you put your probes in totally illogical places. So no fear.

Promoted items from the Pinside Marketplace
$ 50.00
$ 75.00
Playfield - Toys/Add-ons
Latenight Weeknight Mods
$ 12.50
Cabinet - Sound/Speakers
Gweem's Mods
From: $ 18.00
Apparel - Men
Pinside Shop
From: $ 5.00
Cabinet - Other
Rock Custom Pinball
From: $ 40.00
Cabinet - Other
Rock Custom Pinball
$ 299.99
Cabinet - Toppers
Top-Notch Target Shields
$ 14.95
Playfield - Toys/Add-ons
ULEKstore
From: $ 25.00
Cabinet - Other
Filament Printing
$ 19.99
$ 89.00
Playfield - Toys/Add-ons
The MOD Couple
$ 65.00
Cabinet - (Alt) Translites
Judge Dredd Translite Out of stock
Pinball Haus
$ 26.99
Lighting - Interactive
Lee's Parts
$ 11.00
Playfield - Toys/Add-ons
The MOD Couple
From: $ 7.50
Playfield - Protection
Pin Monk
$ 999.00
Pinball Machine
Mircoplayfields
From: $ 3.00
Cabinet Parts
Gameroom Mods
$ 25.00
Playfield - Toys/Add-ons
Back Alley Creations
$ 40.00
Gameroom - Decorations
Arcade Arts
$ 15.00
Playfield - Other
YouBentMyWookie
$ 8.00
Cabinet Parts
RPGCor
$ 19.95
Playfield - Protection
SilverBall Designs
$ 79.99
Cabinet - Armor And Blades
PinGraffix Pinside Shop
$ 159.00

You're currently viewing posts by Pinsider examiner.
Click here to go back to viewing the entire thread.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside