EVO All Evo Model Discussion

1993 ultra turn signal problem

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Old Mar 31, 2023 | 01:55 PM
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From: greece
Default 1993 ultra turn signal problem

Hi all, my bike has a problem withe the right turn signals not flashing, both front and rear. Also the light on the dash wont flash. Left side works good both front rear and the dash. Any ideas?

ThanksStavros
 
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Old Mar 31, 2023 | 02:32 PM
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Find the connector that connects the right side handlebar switches to the main harness, unplug the connector, look for any pins that are damaged, corroded, or pushed out of the plastic connector.

Reconnect the connector.

Trace the brown wire that runs from the handlebar switch to the connector.

Press the turn signal switch (ignition switch on) and read the voltage at the Brown wire at the terminal inside the connector (do not unplug the connector).

Also, read the voltage on the other side of the connector, the white/brown wire.

 

Last edited by Dan89FLSTC; Mar 31, 2023 at 02:36 PM.
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Old Mar 31, 2023 | 02:36 PM
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From: greece
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By connector you mean the flasher module??? Sorry i didnt understand...
 
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Old Mar 31, 2023 | 06:08 PM
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The electrical connector that connects the harness for the handlebar switches to the main harness.

Did you look at the wiring diagram I posted?
 

Last edited by Dan89FLSTC; Mar 31, 2023 at 06:14 PM.
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Old Apr 1, 2023 | 12:46 AM
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I did yes but im not that good with electrical diagrams....ialso all my friends are telling me to check the module thats why i was confused...
 
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Old Apr 1, 2023 | 01:49 AM
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From: greece
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Is the main harness connector inside the fairing?
 
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Old Apr 1, 2023 | 05:53 AM
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You can also do this test at the connector for the turn signal module.

Unplug the connector from the module, turn ignition switch on, press the right turn signal button and read the voltage at the terminal that is on the Brown wire (harness side of connector, not at the module itself).
 
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Old Apr 1, 2023 | 06:39 AM
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Before you start replacing parts try squirting dielectric contact cleaner up into the switch housing. It'll clean off the contacts and blow out any crud that might be up in there. Have had to do it to my '93 a couple of times. If that doesn't work find the wiring plug under your seat, pull it apart and clean the contacts.

 

Last edited by Hey Man; Apr 1, 2023 at 06:41 AM.
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Old Apr 1, 2023 | 07:42 AM
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While the turn signal module is an electronic device that can fail, way to often it is condemned too early and may not the fault of the module at all.

As Dan suggested, do some good old fashioned trouble shooting and detective work. Follow his suggestions, check all the wires and test continuity and voltages of individual wires and connectors.. These bikes are up there in years now and grounds and connection points can be oxidized, broken or loosened up over the years. While it can take time, it is a necessary evil. You may find something simple, or it may take some effort, but at least you will know for sure in the end. Even if the wire looks good, the copper strands under the insulated coating can be oxidized and you won't even see it (which is one of the reasons for checking resistance of the wires from one end to another).

Connection points in the circuit and all grounds should be inspected and cleaned with at least an electronic cleaner designed to help remove oxidization on connectors (De-Oxit "D5" is one of the brands that works well for this). Nothing wrong with using a fine wire brush on the male connectors and a slightly under sized drill bit as a scraping tool for the small female connectors (if you disconnect battery first). Remove ground screws, clean the terminal, clean the contact point for the terminal, inspect the bolts or screws and clean/replace as needed, reinstall. check resistance/continuity before and after cleaning/install. Same thing for the larger gauge battery cables and grounding straps on the frame, battery posts and engine.

Bought my bike used with an aftermarket turn signal module installed by the previous owner. He left the old module in place and just installed the new one near it. He installed an aftermarket module because you can't get the stock one any more. Anyways, I found a broken ground wire in part of the circuit and fixed it while giving the new to me bike a once over. The factory module has worked fine ever since (over 5 years now). Sometimes it's just that easy.
 
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Old Apr 1, 2023 | 11:46 AM
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From: greece
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Thanks for your replies guys, my next question is should i remove the fairing to do the iinitial investigation, or only when i need to access the signal module itself?
 
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