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The basic problem with the rear indicators is they have to rely on the number plate bracket, mudguard, fasteners and frame before eventually reaching a red earth/ground wire which results in the rear indicators having poor earth (unlike the front indicators that have a connection to harness red in the headlamp shell).One thing you can do is connect an earth wire (or wires) into the tail lamp earth connection (under the lamp fairing) by replacing the single red wire bullet with a double common connector and use that as the rear indicator earth/ground (either a single wire connected to the indicator bracket or one from each bulb holder etc.).A simple check to identify a bad indicator earth is to run a jumper wire from a known good earth point or battery positive terminal and touch the other end of the jumper wire to the bulb holder, housing or stem.
The basic problem with the rear indicators is they have to rely on the number plate bracket, mudguard, fasteners and frame before eventually reaching a red earth/ground wire which results in the rear indicators having poor earth (unlike the front indicators that have a connection to harness red in the headlamp shell).
One thing you can do is connect an earth wire (or wires) into the tail lamp earth connection (under the lamp fairing) by replacing the single red wire bullet with a double common connector and use that as the rear indicator earth/ground (either a single wire connected to the indicator bracket or one from each bulb holder etc.).
A simple check to identify a bad indicator earth is to run a jumper wire from a known good earth point or battery positive terminal and touch the other end of the jumper wire to the bulb holder, housing or stem.
