84' GL1200 STANDARD - lower gauge switch mystery - Steve Saunders Goldwing Forums

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post #1 of 9 (permalink) Old 09-03-2018, 09:15 PM Thread Starter
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Location: Los Angeles
Year: 1984
Make: Honda
Model: Gl1200 Standard
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84' GL1200 STANDARD - lower gauge switch mystery

Hi All,

Putting a GL1200 Standard back together. Full restore.

I've come across something that has stumped me and I can't find any info out there. For those of you who own or know about the 1984 STANDARD models:

My sub wire harness, (Thermostat, temp sending, pressure switch wires) that attaches up to the main wiring harness, looks to have some type of switch soldered in place (by PO) instead of the regular thermostat plug. The switch runs up and connects into the plastic piece covering the handlebars below the gauges, so you can switch whatever it is on and off. I have attached pictures.

Questions:
What is this switch?!?
Should I keep it or solder the original thermostat plug back in place?

Thanks for you expertise!
Attached Images
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post #2 of 9 (permalink) Old 09-03-2018, 09:23 PM
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Someone has wired in an auxiliary switch to operate the cooling fan. If the thermostatic switch is functioning correct, eliminate this setup. If not, you'll probably need it to operate the fan.
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post #3 of 9 (permalink) Old 09-03-2018, 10:10 PM
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Model: GL1200A Aspencade
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Yup, fan switch thermostat went bad and instead of replacing it they just put in a switch.
Same thing happened on my '87 Aspencade but I found a new thermostat sensor on eBay for a few bucks.
Might as well put in the new sensor since you already have it all apart.
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post #4 of 9 (permalink) Old 09-03-2018, 10:14 PM
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post #5 of 9 (permalink) Old 09-03-2018, 11:03 PM
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Be careful about buying thermo switches by sellers who don't give operating ranges. A lot of aftermarket switches operate 10-15 degrees below factory specs. It may sound good if you have overheating problems, but the fan will run too often, and too long. The engine temp is critical for best oil protection characteristics.
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post #6 of 9 (permalink) Old 09-04-2018, 12:14 AM
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I couldn't find one that actually fit the plug and I did a LOT of looking. OEM works correctly, of course. I ended up cleaning the original sensor and it started working again.

Why ain't we ridin'?
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post #7 of 9 (permalink) Old 09-04-2018, 12:35 AM
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Quote:
Originally Posted by Bike...and Dennis View Post
I couldn't find one that actually fit the plug and I did a LOT of looking. OEM works correctly, of course. I ended up cleaning the original sensor and it started working again.
That's strange, I found several online suppliers of both new and used sensors when I was working on my bike a couple years ago.
I did a quick search on eBay for "GL1200 fan switch thermostat" and came up with a handful.

However I do recall some people saying the "new" ones had the wrong thread size. I bought one from a salvage yard so it went right in.
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post #8 of 9 (permalink) Old 09-04-2018, 01:16 AM
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The one that had the right threads wouldn't fit the plug on the wire harness. Never got to check the temp range because I won't cut up a wire harness to accommodate the wrong part.

Why ain't we ridin'?
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post #9 of 9 (permalink) Old 09-04-2018, 01:29 PM Thread Starter
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Year: 1984
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Model: Gl1200 Standard
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Thanks All,

Already installed a new OEM thermostat and Thermo switch so good to go here.
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