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Taillight blinking when signalling
- Thread starter airangus
- Start date
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- Tags
- electrical
guenner
Member
Tail and turn lights have one common ground connection in the tail section. If contacts there are corroded then the turn lights may find their ground through the tail light bulb. Hence the tail light is dimmed when the turn light comes on. The turn lights with a not so perfect ground now through the tail light are also dimmed.
/Guenther
/Guenther
stevenrankin
Active member
Start with connections
Yep, Gunther is correct, start with the connections, plugs first. Crud or looseness, might be the problem.
Also make sure the wires themselves are in good shape. You don't mention the model year or mileage on the bike in question. Old age can break down insulation allowing cross feed from one circuit to the other.
A damaged harness due to a seat rubbing or such can do the same thing.
An obvious short will blow the fuse, but a little cross feed may not. Good luck, St.
Yep, Gunther is correct, start with the connections, plugs first. Crud or looseness, might be the problem.
Also make sure the wires themselves are in good shape. You don't mention the model year or mileage on the bike in question. Old age can break down insulation allowing cross feed from one circuit to the other.
A damaged harness due to a seat rubbing or such can do the same thing.
An obvious short will blow the fuse, but a little cross feed may not. Good luck, St.
RPGR90s
Member
Lights
You need to state what bike you have. I worked on a R90s (rear harness is inside the subframe) where the insulation had broken down. Therefore, when the brake light was activated, it's hot wire was touching one of the turn signal wires and lighting it up.
Later bikes routed the harness outside of the rear subframe.
You need to state what bike you have. I worked on a R90s (rear harness is inside the subframe) where the insulation had broken down. Therefore, when the brake light was activated, it's hot wire was touching one of the turn signal wires and lighting it up.
Later bikes routed the harness outside of the rear subframe.
stevenrankin
Active member
wires in the subframe
Yep, I have seen the wires inside the subframe, do exactly what RPGR90S describes. I have also seen owner installed extra tail lights, stop lights, turn signals improperly hooked up cause the same problem.
As long as there is no short circuit, only feed from one positive wire to another positive wire, a fuse won't blow. Both the bulb intended to light will light and the other bulb will happily light as well, even though not as brightly.
Cheers, St.
Yep, I have seen the wires inside the subframe, do exactly what RPGR90S describes. I have also seen owner installed extra tail lights, stop lights, turn signals improperly hooked up cause the same problem.
As long as there is no short circuit, only feed from one positive wire to another positive wire, a fuse won't blow. Both the bulb intended to light will light and the other bulb will happily light as well, even though not as brightly.
Cheers, St.
