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I have what I think is an original slant pole coil in my box-o-stuff. How can I determine if it is a good working one or not?
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Connect a capacitor across the 2 primary terminals, connect a battery to one of the primary terminals, then hold the coil wire 1/4" from that terminal and touch the other battery cable to the other primary terminal (off-on, off-on, etc.) and check for a hot blue spark. -
Well Ray, you could check between the terminals for 3ohms resistance, or you could plug it into a car and see if it fires the plugs. Somewhere there was a post about checking coils and condensers.....You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!Comment
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Here's a coil and condenser tester I make years ago.
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This gallery has 4 photos.Comment
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some info says the plus is where to check the high voltage, and another says use the minus. I also have seen wiring diagrams showing comman internal connection on both plus and minus. Are different coils wired differently to the + - terminals? Also, I get the same ohm reading from the hi tension tower to either plus or minus. This is on several coils that spark well.
which terminal is the power...10-15-2018, 08:11 PM -
Helped a mate with an electronic Efire crab dizzy today.
Would not go, after a couple of hours we found 2 things wrong.
Firstly the magnet drum had to be pushed right home to work and we could not get a 3 ohm coil to run.
Got it running on a 1.2 ohm coil.
Whether the 3 ohm one is dead or electronics don't like 3 ohms.
12 volt...12-23-2018, 11:50 PM -
Today I changed out my coil to the flame thrower 40111. My electric tachometer is hooked up to the coil. Now my tac is showing fast for some reason. Any idea why.09-09-2017, 06:11 PM -
For a PerTronics distributor which of the two coils would you use A or B.
6Volt.
A. Primary .6 Secondary 8.56
b. Primary 1.6. Secondary 11.96...09-18-2019, 02:09 PM -
Can somebody tell me how to check if a coil is good, bad or going ineffective. It's on a 1939 Ford Pickup with the 95HP 239.06-15-2020, 10:29 PM -
My coil is not marked "+"/"-" but "Batt" and "Dist". How do those markings align with +/-?11-01-2018, 06:27 PM -
When converting my A to 12 volt I've heard that you have to switch the two primary wires on the coil. Which small primary wire goes to positive and which to negative side of coil?02-22-2019, 08:55 AM -
What do ignition coil testers measure ? I’ve seen some very old ones with a ‘good-bad’ meter on them that also allow the high tension wire to plug into the tester. I’m guessing that these testers measure the high voltage generated ??
I’m considering building a simple test device and thinking that I would simply measure the length of the spark produced.
thanks - Jim02-04-2021, 08:03 AM -
New touring engine with Model B distributor. Which side pos or neg is the black wire to the coil?09-27-2019, 02:39 PM -
I have read about the big no no about mounting a ignition coil, terminals down on Model A firewall. I have a NAPA 12V internal resistor mounted upside down for 3 years. Brother rumbles by with 72 dodge Demon , nice 340 , while looking around I noticed ignition coil bolted on its side to intake manifold , factory dodge design. the same coil that I am using exactly, He says its been there for 15 plus...05-12-2018, 05:18 AM
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