Measure the resistance of coils ?


Information and questions on GL1100 Goldwings (1980-1983)
Post Reply
User avatar
velvetrider
Posts: 176
Joined: Sun Oct 13, 2013 10:38 am
Location: Mooresville, North Carolina
Motorcycle: 1983 GL1100 Interstate

Measure the resistance of coils ?

Post by velvetrider »



I am down to them. The false tank cover is off. the air box is out. I am still trying to figure out how to remove them. How does one go about measuring the ohms which pass through. I assume it is from one of the colored wires on top, to the output of each. Is this correct?


User avatar
OldguyGlen
Posts: 376
Joined: Sat Nov 24, 2018 10:55 am
Location: Mound,MN
Motorcycle: ,
1980 GL1100 STD/Vetters
1966 Honda 90

Re: Measure the resistance of coils ?

Post by OldguyGlen »

Quick answer... don't have detailed specs....
Secondary winding = 20k Ohms from sparkplug wire to sparkplug wire (including the plug wires themselves), and has NO connection to ground.
Primary winding = about 0.5 ohms, black wire to colored wire.
I can't remember if this should include the ballast resistor wired in the black wire (12 v supply wire to both coils).
Just check both coils... they should agree with each other and be very close the the same readings on both.
Mine is a 1980... possible that your '83 is different ??
User avatar
velvetrider
Posts: 176
Joined: Sun Oct 13, 2013 10:38 am
Location: Mooresville, North Carolina
Motorcycle: 1983 GL1100 Interstate

Re: Measure the resistance of coils ?

Post by velvetrider »

Glen ,, I measured 1.2 ohms for right Primary coil. and 2.2 for left Primary coil. My Service book says primary should have, 04. +/- .004, I couldn't get a reading on the secondary coils.. I am going to simply measure each # 1&2,, for right coil. and 3 & 4 for left coil. Clearly there is something wrong with the right hand coil. I will verify tonight when I can see the spark better at each cycl.
Thanks.
User avatar
velvetrider
Posts: 176
Joined: Sun Oct 13, 2013 10:38 am
Location: Mooresville, North Carolina
Motorcycle: 1983 GL1100 Interstate

Re: Measure the resistance of coils ?

Post by velvetrider »

After basically removing the coils. I am thinking a newer 1500 would look better in my carport. Got any suggestions,,???
Thanks Guys.
User avatar
83 MUTT
Posts: 36
Joined: Sat Jun 05, 2021 4:32 pm
Location: South Newbury NH
Motorcycle: 3 81's a 82 a 83 a84

Re: Measure the resistance of coils ?

Post by 83 MUTT »



User avatar
Rambozo
Posts: 3700
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: Measure the resistance of coils ?

Post by Rambozo »

Be aware that single digit resistance readings are below the noise floor of a lot of multimeters. Unless is has a specific lo ohms range, or uses a four wire measurement, take the readings as a general ballpark. If a coil should have 4Ω and you read 2Ω, no big deal. If you read .4Ω or 40Ω then I would be concerned. Also you will need to zero out your leads for low readings.
User avatar
AZgl1800
Posts: 2932
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: 2009 Piaggio MP3 250cc https://imgur.com/foGDjgv

'02 GL1800 lives in Dawsonville, GA now.
My son is going to enjoy it for many years to come.

Re: Measure the resistance of coils ?

Post by AZgl1800 »

Rambozo wrote: Wed Nov 10, 2021 6:50 pm Be aware that single digit resistance readings are below the noise floor of a lot of multimeters. Unless is has a specific lo ohms range, or uses a four wire measurement, take the readings as a general ballpark. If a coil should have 4Ω and you read 2Ω, no big deal. If you read .4Ω or 40Ω then I would be concerned. Also you will need to zero out your leads for low readings.
that is why I have held onto my Analog meter with the mirror scale, and a very low Ohm range.


~John

2009 Piaggio MP3 250cc

https://i.imgur.com/4SOFPYS.jpg
Post Reply