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Wayne S.
Wayne S., Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1255
Experience:  Experienced and Licensed Motorcycle Mechanic - all sizes and brands welcome.
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I have a 1985 honda goldwing 1200 aspencade the front plug

Customer Question

Hi,I have a 1985 honda goldwing 1200 aspencade the front plug on both sides are not getting fire
Submitted: 2 years ago.
Category: Motorcycle
Customer: replied 2 years ago.
I have checked the coils the one for cylinder 1and 2 is not putting out any spark but coil for 3 and 4 great spark, so i switched sides with the other coil still no out put on 1 AND 2 but both coils the wires show 12 volts going in also checked the plug that goes to pulse generators the yellow and white wires have 333 on them blue and white wire shows 357 on them . bike fires really fast but front two plugs no spark at all
Expert:  Wayne S. replied 2 years ago.


you say you tried switching the coil wires?
If your one pulse generator is working then
it should spark the suspect coil if the coil is okay.
If you can't get the right coil to spark
then it might be faulty. If hooking the good
side pulse generator to it fails then the
coil is no good. Once the coil is eliminated
then check the pulse gen yellow and white for
small voltage pulse. Probably either the coil
or pulse gen if you have voltage to the coils.
(Pulse gen ohms = 330)
Coil primary is 2.7 ohms, about 20k secondary.
Let me know if you need any info.
Customer: replied 2 years ago.
ok went out and hooked the blue wire from good side to the other coil that had yellow wire and it made the coil spark when cranking engine so hooked volt meter into the blue wire just to see what happened when cranking engine volts went way high but hook it in yellow wire and crank on engine only went to around 48 volts does this mean the pulse generators are bad
Expert:  Wayne S. replied 2 years ago.
If you can swap the pulse generator wires and see
if you get spark on the front cylinders coil
that way then the pulse generator is probably
If not then you might be looking at a faulty
control module or corroded connections etc.
Ideally volt checks are done with a "peak"
voltmeter which checks the peak voltage output.
Customer: replied 2 years ago.
ok today i swapped pulse generator wires around bike still gets fire to back plugs but front plugs still no fire have unhooked cdi connectioncs no problem of corrosion in them took cover off cdi box no signs of bad soilder or burnt spots
Expert:  Wayne S. replied 2 years ago.
Some bikes had ignition switch problems.
I would make sure the suspect coil is well
grounded and run a power wire directly to it
from the battery positive. Also check the
plug wire and spark plug cap for problems.
If you can find a spark control box to try
then do that too. Check the actual voltage
on the coils black/white power wire,
should be near battery voltage and over
12 volts or the connectors are weak.
Customer: replied 2 years ago.
still cannot find my problem have checked coil wire again with ignition key on there is 12v coming from it also if i take the negative side coil wire from good coil which is blue wire and move just it over to the dead coil which replaces the yellow wire then that coil has fire but put yellow wire back on and coils dead again so were ever yellow wire comes from is not working. I have been tracing wires and so far all i have found was the plug that come from voltage reg had burnt place got those two wires out and hooked them back together and when bike is running they get warm but when you bring rpms up for a couple seconds they get pretty hot both of them are yellow also
Expert:  Wayne S. replied 2 years ago.
You can see if the coil yellow wire has continuity or
connection to the ignition control module.
That is where the voltage comes from to the ignition
coils. If there is no voltage being produced there
then according to your other test findings I would
say the problem is in the ignition module itself.
It appears that when you switch things around everything
works except the ignition module yellow output.
The coils seems okay as well as the pulse generators.
That only leaves either the wiring or connection to the ignition
module on the yellow wire or the module itself is faulty.
The regulators on these run very hot as they shunt
over current to ground. I would suggest cutting
the connector off and soldering the wires together.
Replace any bad wiring. This will prevent connector
melting problems. It will still run very hot but
should survive.
Sometimes an ignition module can be picked up on ebay or such
unless you know anyone that would let you try their module
on your bike.
Expert:  Wayne S. replied 2 years ago.
These guys can repair most ignition modules
or replace them:
Also if you feel adventurous you could reheat the solder
joints in your existing ignition module and see
if that works.