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Steve
Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6828
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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1981 Suzuku FA50M Tailight and headlight blinking when

Customer Question

1981 Suzuku FA50M
Tailight and headlight blinking when flasher turned on, which is draining the 6v battery.
Already checked Restricter, Lighting coil, Charging coil, Wiring diagram (which there are several diff versions)..have pulled the harness, checked wiring
The bike was not built originally with a regulator...thinking maybe it needs one...unsure
Submitted: 10 months ago.
Category: Motorcycle
Expert:  Steve replied 10 months ago.

you have bad ground connections on the flashers. they are using the ground connection through the head light and tail light.

this is not uncommon in older vehicles. you just need to go through the electrical system, clean up all the contacts and make good ground connections.

Steve

Customer: replied 10 months ago.
What do you suggest i clean the contacts with? I have already brushed and blown all contacts in the connections to the handles and replaced all pins and clip connectors. The only thing i have not done is pull the wiring from inside the rear rack and handlebars, figuring that shouldnt have to be done.
Expert:  Steve replied 10 months ago.

you have poor ground connections. you need to fix them.

whatever you have done has not resolved the problem.

in extreme cases, I have spliced in new ground wires.

pay particular attention to the connections between the battery and frame.

ohm out the grounds from the flashers all the way to the battery if you have to.

Steve

Customer: replied 10 months ago.
What does "ohm out" mean? Arenyou saying test them out?
Expert:  Steve replied 10 months ago.

the resistance function of a multimeter can be used to verify the continuity of wiring and connectors.

HIGH resistance readings indicate poor contact.

on the meter, more OHMs = higher resistance = poorer connection.

Steve