GL 1500 Thermo Switch

Information and questions on GL1500 Goldwings (1988-2000)
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GL 1500 Thermo Switch

Post by franksquires » Sat Apr 23, 2016 7:28 pm

Would someone kindly tell me if I ground my thermo switch lead wire and the fans come on, does that indicate a faulty switch. They are not working when they should come on at high temp. Thanks in advance.

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Dusty Boots
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Re: GL 1500 Thermo Switch

Post by Dusty Boots » Sat Apr 23, 2016 7:41 pm

How far up on the heat gauge does the needle go to before they come on?
Mine come on at about the 3/4 mark

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Re: GL 1500 Thermo Switch

Post by Aussie81Interstate » Sat Apr 23, 2016 11:48 pm

If you ground the switch - the fans should definitely come on - if not then you have a fault in the wiring somewhere.

I had an issue a while ago with a blocked radiator causing some overheating - then going through and finding my thermo switch itself was bad - causing fans to be on all the time or not come on at all. Put in a genuine Honda replacements witch - all back to normal. Do not bother with ebay trying to find one - as you need the correct temperature range..


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Re: GL 1500 Thermo Switch

Post by bustedwing » Mon Apr 25, 2016 4:27 pm

If i'm reading your question right, you are asking about the thermal switch. You know that the fans work because you grounded the thermal wire and the fans turned on. the problem that you are having is overheating, in which case the switch would be bad. as long as you have voltage up to the switch.Check voltage at the switch, then to verify it, once you get the switch out, put it in a pail of hot water and test it to see if it changes at the right temp. I hope this gives you some ideas, but if you still have troubles, stop in again. Ride safe.

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