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Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6909
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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99 roadglide ignition fuse keeps blowing

Customer Question

99 roadglide ignition fuse keeps blowing
Submitted: 10 months ago.
Category: Motorcycle
Expert:  Steve replied 10 months ago.

did you perform any maintenance or add any accessories before this started?

tell me everything you can.


Customer: replied 10 months ago.
nothing added for a couple seasons ran great the week before
Customer: replied 10 months ago.
seemed to run bad like on one cylinder before it died
Expert:  Steve replied 10 months ago.

is the bike carbureted or fuel injected?

what else can you tell me?


Customer: replied 10 months ago.
Carburetor, mostly stock misfired for about 2 miles and quit. pulled over and found Ignition fuse burt. replaced and tried to start and blew fuse again
Customer: replied 10 months ago.
tested circuit and ignition is pulling 20.1 amps bike ignition on on not started
Expert:  Steve replied 10 months ago.

there is your answer.

the ignition fuse is a 15A fuse. the ignition normally pulls around 10A.

you either have a problem with the coil or the ignition module.

check the coil primary resistance. it should be a single fire coil with 0.5 ohm primary resistance.

if that checks out, the problem is in the ignition module or the wiring to the module. if it's pinched or grounded it can cause wire to draw extra current.


Expert:  Steve replied 9 months ago.

let me know if you need more help.

if not, please leave a POSITIVE RATING.

thank you,