Radiator fan


Information and questions on GL1000 Goldwings (1975-1979)
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ajohn952000
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Joined: Wed Mar 28, 2012 12:11 pm
Location: Vancouver, WA
Motorcycle: 1978 Honda Gold Wing GL 1000

Radiator fan

Postby ajohn952000 » Mon May 14, 2012 8:23 pm



I pulled off my radiator fan check it, and I am no electrician. The wiring from the fan has two wires coming from the fan motor then joins at a plug-in. How do I test this to see if the fan is still good?



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Fred Camper
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Re: Radiator fan

Postby Fred Camper » Mon May 14, 2012 8:32 pm

Use a 12 volt battery or 12 volt battery charger. Positive to one end, negative to the other. If it runs backwords, then which the leads.

ajohn952000
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Location: Vancouver, WA
Motorcycle: 1978 Honda Gold Wing GL 1000

Re: Radiator fan

Postby ajohn952000 » Mon May 14, 2012 8:38 pm

Do have to remove the plug to separate the two wires?

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Fred Camper
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Re: Radiator fan

Postby Fred Camper » Mon May 14, 2012 8:53 pm

If you are careful, you can use a short lead of 12 gauge wire in each female plug end. Then apply the voltage to the short leads of 12 gauge being very careful to not let the leads touch or your battery can explode or your 12 volt charger will trip the circuit.

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JellyBelly
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Motorcycle: 2000 Valkyrie GL1500
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Re: Radiator fan

Postby JellyBelly » Wed May 16, 2012 7:18 am

Is there a reason you think the fan motor is bad?
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

dizzy
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Joined: Thu Mar 29, 2012 10:40 am
Location: Clearwater, Florida
Motorcycle: 1979 gl1000

Re: Radiator fan

Postby dizzy » Wed May 16, 2012 7:29 am

I have coolent problems also, previous owner made a two wire with spade connectors to power the fan and putting juice to the wires I find the fan works. I changed out the thermostat with help from here picking out a equivelent from auto parts supply.(mucho dollars saved Thanks )
I took my Thermostat housing and put it in boiling water to see if the fan switch on it opened or closed and it didn't so I guess I need one of those.
How does it work?
Is there a hot leg to the fan switch then on to the fan or is it a ground instead of a hot line?

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JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: Radiator fan

Postby JellyBelly » Wed May 16, 2012 7:44 am

What was the temp of the water you tested in....I know you said boiling....the boiling point of water is 212 Fahrenheit...The fan will come on at 208-216 Fahrenheit. If will go off at 199-207 Fahrenheit. It should be ok...did the water cool any before you tested? It is recommended you bring the water to the boil while testing thermostat with a thermometer in it.

Testing the fan motor...blue is positive...black is negative.
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

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WingAdmin
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Re: Radiator fan

Postby WingAdmin » Wed May 16, 2012 10:05 am

dizzy wrote:I have coolent problems also, previous owner made a two wire with spade connectors to power the fan and putting juice to the wires I find the fan works. I changed out the thermostat with help from here picking out a equivelent from auto parts supply.(mucho dollars saved Thanks )
I took my Thermostat housing and put it in boiling water to see if the fan switch on it opened or closed and it didn't so I guess I need one of those.
How does it work?
Is there a hot leg to the fan switch then on to the fan or is it a ground instead of a hot line?


Correct, there is +12V on the blue wire at the fan when the ignition switch is ON. The black wire then goes to the switch, which closes its contacts to ground when it gets hot.

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Fred Camper
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Re: Radiator fan

Postby Fred Camper » Wed May 16, 2012 4:14 pm

Do not claim a fan switch is bad in a boiling water test, that can only prove positive as the top of the spec is above the sea level boil point of water and worse above sea level. If it comes on below 230 F you have a good one. That is at the top of the white band on the gauge.

dizzy
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Joined: Thu Mar 29, 2012 10:40 am
Location: Clearwater, Florida
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Re: Radiator fan

Postby dizzy » Wed May 16, 2012 4:26 pm

Thats good to know guys, I put a pot of water on my coleman stove outside and it was windy. It made it to a low boil not rolling and I didn't notice any change with the ohm meter. But if it don't suppose to come on until hotter yet I hold off on that purchase.
I have so much to do on this bike I should have parted it out lol
oh well live and learn hopefully




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