Weak/no spark
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
Anything can fail at any time, so even if it is a year old, it is still suspect.
If you think about the circuit, WP, when you turn the ignition on, the coil should be charging itself because the coil negative should be grounded by the ignition module (or points.) The coil is fired by opening the circuit (ground), mking the coil collapse and inducing a current in the secondary circuit, the high voltage side of the coil. A test light has a bulb in series between the pointy end and the alligator clip. Not much current will flow through the bulb. The coil is charged by a bunch of current flowing through it. Plus, the coil is already grounded at the negative side. So, adding an additional high resistance circuit between ground and the coil negative, then removing it will do nothing at all to the coil if it is still in the main circuit, and damn little if you pulled the coil negative side first.
If you think about the circuit, WP, when you turn the ignition on, the coil should be charging itself because the coil negative should be grounded by the ignition module (or points.) The coil is fired by opening the circuit (ground), mking the coil collapse and inducing a current in the secondary circuit, the high voltage side of the coil. A test light has a bulb in series between the pointy end and the alligator clip. Not much current will flow through the bulb. The coil is charged by a bunch of current flowing through it. Plus, the coil is already grounded at the negative side. So, adding an additional high resistance circuit between ground and the coil negative, then removing it will do nothing at all to the coil if it is still in the main circuit, and damn little if you pulled the coil negative side first.
WP
Thread Starter
|
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
It was the coil.
Went to the dealer today and bought a new coil and after I installed it the bike fired right up!!!
So much for the test procedure in the book!!!!!!!!!!!
Went to the dealer today and bought a new coil and after I installed it the bike fired right up!!!
So much for the test procedure in the book!!!!!!!!!!!
Thread
Thread Starter
Forum
Replies
Last Post
