Wildguzzi.com
General Category => General Discussion => Topic started by: guzzi ride on March 22, 2026, 12:41:01 PM
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I could really use some help. I have a question for you... my right side turn signals don't work, but 4-way flashers work fine on all 4 signals. I saw posts that it might be the dash as it controls the signals. So like you yesterday I removed all the body panels-PITA and checked the plug on the back of the dash and everything looks great. Before all of this I had also checked the switch on left handlebar and cleaned everything up although everything looked good. so now what might it be ???
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Bike model? LED or incandescent bulbs? Tested voltages at the indicator connectors?
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Well that might help, Duh. 08 Norge.
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So, as OEM they are traditional bulbs, albeit coloured; we can rule out a possible faulty load resistor, as that could account for the symptoms.
Tried disconnecting the battery overnight, to reset the ECU/clocks?
Possibly a bad earth/chassis ground for the RHS indicators. Using the hazard lights the grounding may come from the LHS and a look at the wiring diagram will confirm if this is a possibility.
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Yes I had disconnected the battery and checked the dash plug because the signals are controlled by the dash. All wiring looks good as far as I can see.
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I've had a look at a wiring diagram and can see only the positive feeds come from the dash, the grounds being shared by other components. If the connectors are interchangeable, I'd try switching left & rights signals - the rear is possibly easier to access. This may narrow down any wiring breaks etc.
If not already get yourself a really cheap automotive multimeter (I have a decent one kept in the house and a cheapo AliXpress one in the garage) - it doesn't need to be super accurate. Try to squeeze the probes into the connector blocks whilst still connected, to check for output voltage: perhaps small straightened paperclips will help.
Oxidised connection on the handlebar switchgear? It's possible.
For sh*ts & giggles, I've just done this:
https://www.google.com/search?client=firefox-b-lm&q=guzzi+norge+one+side+indicators+not+working
Check out the AI response. :wink:
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Check your grounds, all common grounds on motor case.
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Check your grounds, all common grounds on motor case.
Yep,and check the ground inside the lights. They are plastic sockets and deform easily around the contact support area.
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So that'll be three of us that have mentioned grounds. :undecided:
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Thank you all for the tips. I'll do some more checking with the grounds etc.
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Quote from: DoubleGuzzi on March 23, 2026, 05:23:37 PM (https://wildguzzi.com/forum/index.php?topic=124921.msg1919947#msg1919947)So that'll be three of us that have mentioned grounds. :undecided:
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Indeed, my '79 LM2 had a ground problem to the rear indicators and they would occasionally fail to work.
Never liked relying on the frame to carry the ground so I ran a wire direct from battery negative and no issues since.
I appreciate this is different era of tech we are talking about but "ye cannae change the laws of physyics"
;.
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The bulbs have a single filament for blinker and emergency flasher.
If the flashers work, the wiring and ground to the bulb is fine.
Sounds like a handlebar switch, wiring to the switch or a dash problem.
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The bulbs have a single filament for blinker and emergency flasher.
If the flashers work, the wiring and ground to the bulb is fine.
Sounds like a handlebar switch, wiring to the switch or a dash problem.
On reflection, you may well be right; I did mention switchgear. :wink: