Iginition Coil Ohms

[BuellRonin]

Just testing my new ignition coil to the old one. I have a multimeter, but it has X1K and the manual mentions to put it on RX1K. From what I found the "R" is for resistance.

The "old one" primary circuit test looks to be within range (0.5-0.7 ohms), but the secondary, if things are correct, are at 15 ohms and should be at 5.5-7.5 ohms.

I just got my new one, and the primary reads within range (0.5-0.7 ohms), but the secondary reads the same as the old, running a range of 15 ohms.

I'm not sure what to make of it. The "within" ranges come from the manual, 2005 Lighting. Not sure if the "ranges" were updated and the manual is outdated?

I hate dealing with electrical business.

Any thoughts. I will still put the new part on, as it is not returnable to Surdkye. Just got off the phone with their service dept and he is going to check with his techs on this.

See what happens.

 

[Internet Annoyance]

If im not mistaken the primary you are looking for a short or open circuit, so the primary resistance is not important other than looking for a short or open circuit.

I would have to test some coils here and that would take a day or 2 before i could get to it,, but 15 ohms sounds like way too much, crazy in fact. You need SOME resistance for it to work, but too much is bad too.. I have some DYNA coils with super low resistance i bought new in the box years back at a swap meet and didnt check with a meter before buying, but they were so cheap i rolled the dice, To use them on certain projects i have I would have to use a ballast resistor in line with them to bring the OHMS up to what i need. I use Harley style coils on vintage british bikes with upgraded electronic ignitions (Boyer Brandsdens, and Sparx) these ignitions need 3.8 to 4.2 ohms for optimum performance, they CAN run up to 5 ohms in lower compression and lower performance apps, but its hard on the brain boxs,,, if you go outside that range you risk damage to the brain boxs, So i know those applications by memory and also had in my office somewhere the part numbers for most aftermarket coils and their Ohms ranges (Andrews, Drag specialities, ACCELL, etc etc)

So sorry i am not more helpful at the moment, but hope you get a better answer than my rambling in the interim, if not let me know tuesday or weds and ill test some of my Buells here and let you know.

But,, what does the factory workshop manual tell you? That would be my first stop if i were you.

 

[BuellRonin]

The manual for this test, the coil is suppose to be off the bike. With a multimeter the primary coil circuit test is suppose to be at 0.5-07 ohms normal resistance.

The secondary coil circuit test is suppose to be at 5.5-7.5k ohms normal resistance.

But on both the new and the old the readings are the same, with the secondary being way at 15 ohms. Now, I'm outside my range here as I speak about this, so I am not an electrician or tech. I'm just reading what the multimeter states. And the manual doesn't mention anything about putting any type of resistance for this particular test.

Dunno, but had another issue occur that stopped me from testing. Will update once I put out this other fire.

Cheers!