New Member, COOLING FAN advice please


Information and questions on GL1500 Goldwings (1988-2000)
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Scaldedchevy
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New Member, COOLING FAN advice please

Post by Scaldedchevy » Thu Apr 04, 2019 8:17 pm



Hello,

Please forgive me if I am reopening an old topic.

My name is James. I live in Southwest Louisiana, where it gets extremely hot and extremely humid. I have a beautiful 88 GL1500 that I recently noticed is getting too warm whenever I am slow rolling or stopped at a light. I found that only my right side fan is engaging when the temp reads approximately half. I will explain what I have done, and I will gratefully accept any advice.

I ensured proper coolant level, and type of coolant. Water pump is working. Thermo fan switch is good. I jumped the black wire to ground. When I did this BOTH fans engaged and stayed on with no cut-outs.

I plugged the switch back up and idled the bike to allow it to get warm. Whenever the temp came up just above or near half, the right fan kicked on. A short time later, the left fan also kicked on. However, after about a minute the left fan kicked off, and did not come back on.

I am left wondering. The wiring would seem to be good, in that both fans engage when you jump the switch. The switch is good, because it engages the fans. Now, if the fan motor were bad, wouldn’t the fan not engage at all?

I removed the side cover and closely inspected the fan and shroud. I found no loose wiring. No “burnt smells,” or anything that was obvious.

Is this normal operation for an 88? I can’t imagine that it is, because it doesn’t make sense to me. But, I’m no expert. The temp will climb to about 60%-65% whenever I am stopped, and will go down quickly when I come up to speed. The trouble is, when the 126 degree summer heat kicks in like it did last summer, I foresee this to be a problem.

Does each fan have its own relay? Could that be the issue? A failing relay?

Again, I appreciate any help. Yahoo.com blocks all emails from this forum, so I will periodically check back for any replies.

Gratefully,
James Vallery
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Rodzim
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Re: New Member, COOLING FAN advice please

Post by Rodzim » Thu Apr 04, 2019 10:41 pm

I havent paid attention to the fans running staggered like that, but its normal for the temp to go a little past have when standing still. As long as it goes back down when the fans kick in its gonna be ok.

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DenverWinger
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Re: New Member, COOLING FAN advice please

Post by DenverWinger » Fri Apr 05, 2019 6:30 am

The fans aren't controlled separately, if the right fan comes on and the left one is intermittent there *HAS* to be a bad connection somewhere...
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
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dingdong
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Re: New Member, COOLING FAN advice please

Post by dingdong » Fri Apr 05, 2019 7:07 am

If you short across the fan switch and both fans work every time then there is a problem with the switch. Probably dirty or corroded contacts providing only enough current flow to run one fan consistently.
Tom

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John F. Kennedy would be impeached by todays liberal Democratic socialist party.

Scaldedchevy
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Location: DeRidder, LA
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Re: New Member, COOLING FAN advice please

Post by Scaldedchevy » Fri Apr 05, 2019 9:30 am

Thank you guys for the input. I ordered a new switch.

James

Scaldedchevy
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Re: New Member, COOLING FAN advice please

Post by Scaldedchevy » Mon Apr 08, 2019 6:58 pm

Gentlemen,

I installed the new fan switch today. When the temps came up, both fans engaged. HOWEVER, I noted that the right fan was performing very strong, blowing off a significant amount of heat.

The LEFT fan, engaged only for about two minutes. During this period, I observed that the left fan was not turning at anywhere close to the RPM’s of the right fan. In fact, the revolutions were low enough to make the heat exhaust nearly imperceptible. I tapped on the left fan motor housing with a small hammer. The left fan RPM increased and decreased erratically several times, and then shut down for good. The right fan continued to perform as it should.

I checked the ground wires. They seem in good working order.

Is my next step the left fan motor itself?

Thank you very much,
James from Southwest Louisiana

kane67
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Re: New Member, COOLING FAN advice please

Post by kane67 » Mon Apr 08, 2019 11:31 pm

Hi James,

Yes, fans should operate same way both when they are engaged. Left fan connector pins have good clean surfaces?
I don’t know if motor can be opened and cleaned, or supply 12v to run it manually if it gets better?
I would replace it, then it should work perfect.

Remember also to check and clean the ground wire connector to the left radiator bottom (next to the switch)
If it has bad contact, fan switch won’t give ground when temps are getting higher.

How do I know... :lol:

Br, kane

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4given
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Re: New Member, COOLING FAN advice please

Post by 4given » Tue Apr 09, 2019 6:07 am

You could interchange the fans. If the fan in question acts the same then you will know the fan is the issue.

Scaldedchevy
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Re: New Member, COOLING FAN advice please

Post by Scaldedchevy » Tue Apr 09, 2019 7:30 am

kane67 wrote:
Mon Apr 08, 2019 11:31 pm
Hi James,

Yes, fans should operate same way both when they are engaged. Left fan connector pins have good clean surfaces?
I don’t know if motor can be opened and cleaned, or supply 12v to run it manually if it gets better?
I would replace it, then it should work perfect.

Remember also to check and clean the ground wire connector to the left radiator bottom (next to the switch)
If it has bad contact, fan switch won’t give ground when temps are getting higher.

How do I know... :lol:

Br, kane
Thank you Kane,

I will clean those contacts and pins this morning. Hopefully that will fix it. I went ahead and ordered another fan. I couldn’t find a new one, but found one that was taken off of an ‘88 with low miles.

Now, to actually remove the fan, am I going to have to move the radiator, or can I get to it from the side? Not a lot of room to work in that area, and I haven’t tried yet. I am hoping that I can unbolt the shroud from the side and access it from there.

Thanks
James

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bellboy40
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Re: New Member, COOLING FAN advice please

Post by bellboy40 » Tue Apr 09, 2019 8:50 am

You don't have to remove the radiator to get the fan out. The are two bolts to remove and unplug the connector and then it comes out. It is not easy to get it out or back in because there is precious little room to work there but it is doable. Getting it back in is harder than removing it. There is a bunch of wiring in that area that it wants to hang on. I found that placing something behind where the fan has to go to let it slide in against is a help in getting it back in. A thin piece of plastic, such as a notebook divider or such, would help.

Scaldedchevy
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Re: New Member, COOLING FAN advice please

Post by Scaldedchevy » Tue Apr 09, 2019 8:53 am

Good information, thank you very much.

James

Scaldedchevy
Posts: 28
Joined: Thu Apr 04, 2019 4:57 pm
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Re: New Member, COOLING FAN advice please

Post by Scaldedchevy » Thu Apr 11, 2019 10:49 am

Well, I tried my best to get the fan out myself. I stopped after about two hours. I don’t think I can do it without breaking something. Fortunately, I know a guy lol. I have another fan coming. I’ll let someone do it that has the skill and experience.

James



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