Turn Signals Only Not working - 2002 GL1800


Information and questions on GL1800 Goldwings (2001-2017)
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RichWing
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Joined: Thu Sep 12, 2019 7:33 am
Location: United States
Motorcycle: 2002 GL1800 Goldwing

Turn Signals Only Not working - 2002 GL1800

Post by RichWing » Thu Sep 12, 2019 9:41 am



Only the turn signals on my 2002 Goldwing GL 1800 stopped working. Checked the rear Relay under seat good, check fuse for tun/Horn good. Makes since because the horn works fine. Emergency flashers work fine. I ordered and replace the entire switch assembly on the handle bar. I noticed the following relay located under the instrument panel PART - "RELAY, POWER (MICRO ISO 5P) 39795-MCA-000 " . Does this part have control over the turn signals. I noticed on one form a person had a problem like this and found a loose wire but Cant seem to notice a loose wire or get to the area to see if there is one.



Techdude2000
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Joined: Mon Jun 13, 2011 10:11 pm
Location: Lexington, KY
Motorcycle: 2004 GL1800

Re: Turn Signals Only Not working - 2002 GL1800

Post by Techdude2000 » Sat Sep 14, 2019 11:26 pm

This is the position light relay and has nothing to do with the turn signals flashing or not. Sounds like your cancel unit has died or has a bad connection on its connector at the top of the steering stem. If you search for “dead turn signals” at Gl1800riders.com, there’s lots of threads about the possible causes.

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RichWing
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Location: United States
Motorcycle: 2002 GL1800 Goldwing

Re: Turn Signals Only Not working - 2002 GL1800

Post by RichWing » Sun Sep 15, 2019 7:14 am

Thank you so much. I will look at that and update post when finding out what it is.

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RichWing
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Location: United States
Motorcycle: 2002 GL1800 Goldwing

Re: Turn Signals Only Not working - 2002 GL1800

Post by RichWing » Tue Sep 17, 2019 10:03 am

Thoughts; so if its the cancel unit, if I pull the White/Black wire to the cancel unit should the turn signals work then and just not have the function of the cancelling?

Also what is the likelihood of this part being bad? CIRCUIT ASSY. (TURN SIGNAL RELAY)
37107-MCA-671 It appears to be a circuit board behind the speedometer.

Techdude2000
Posts: 193
Joined: Mon Jun 13, 2011 10:11 pm
Location: Lexington, KY
Motorcycle: 2004 GL1800

Re: Turn Signals Only Not working - 2002 GL1800

Post by Techdude2000 » Tue Sep 17, 2019 11:25 am

RichWing wrote:
Tue Sep 17, 2019 10:03 am
Thoughts; so if its the cancel unit, if I pull the White/Black wire to the cancel unit should the turn signals work then and just not have the function of the cancelling?

Also what is the likelihood of this part being bad? CIRCUIT ASSY. (TURN SIGNAL RELAY)
37107-MCA-671 It appears to be a circuit board behind the speedometer.
The circuit board is good. On the first 5 years of the 1800 wing, Honda used that circuit board instead of a flasher relay. If it goes bad, your hazards won’t work either. The first thing you should do is get to the cancel unit’s connector on the top of the steering stem and look closely at its pins in the little green connector. They bend easy and push out of the back of the connector very easily. Cutting or disconnecting the white/black wire will only kill the auto off function, it has no function on the circuit if the bike is not moving. These cancel unit’s do go bad and sometimes they get killed by adding lights and other accessories and not hooking them up correctly. There’s two things you need to do, 1. Make sure it’s getting power from the circuit and, 2. that it receives the ground from the turn signal switch when you push it left or right.

There is another possibility that can kill the signals but not the hazards. If the turn signal diode or it’s wiring has an issue, you could lose the signals and the cancel unit be good. If you turn on the key and turn on the right or left turn signal, does the corresponding side’s position light turn off in the mirror pods? If the light turns off, this indicates the cancel unit is good and there’s an issue with the diode or the wiring. If it fails to turn both sides off when tried left and right, this indicates the strong possibility of the cancel unit being dead.



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