Fan thermo switch; is this right? (cheap FIX?)

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rcmatt007
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #76 by rcmatt007 » Tue Dec 12, 2017 9:44 am

far better it be stuck on, then not turn on. However, I sure don't like the current draw
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CYBORG
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #77 by CYBORG » Tue Dec 12, 2017 10:44 am

rcmatt007 wrote:far better it be stuck on, then not turn on. However, I sure don't like the current draw


That's part of the reason I convert mine to front mounted modern fans. Better air flow, and lower current draw
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200

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tlbranth
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #78 by tlbranth » Sat Dec 23, 2017 9:30 pm

Got the Beck/Arnley, Part# 2011614 switch. Look around on ebay for a good price with free shipping. Got the connector here: http://www.cycleterminal.com/mt-series-090.html. The connector works great. I ordered 2 of them to get past the $5 minimum. Shipping was cheap. Got 2 connectors, shipped for under $10. Connector is completely sealed and latches onto the sender. There's a left and right hand version based on where the locating thingy is on the switch. I ordered MT090-R and I don't know why this would change for the 2011614 but as my wallet is getting down to the proverbial 'stems and seeds', I ordered the switch first and compared before ordering the connector. I've seen the connector on Amazon for a $12 or so apiece. So if you're flush.......
Here's a pic of the switch installed with the connector on it. I also drew up a schematic for wiring in a Bosch/Tyco relay. You NEED the relay. In the wiring diagram, black lines denote existing wires and orange lines are new wires you'll add. Dots are splices. The black wire between the fan and switch must be cut as shown. I've noted the wire gauges I'm using. The wires to the fan should be at least 18 gauge. The wires to the relay coil (85 & 86) can be 22 or larger.
Oh, one other thing I reckon you ought to do: lube the o-ring with something (I used Sil-Glide). When you tighten this puppy, the o-ring has to slide against something and it has the potential of getting a bit roughed up if not slippery.
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1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750

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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #79 by tlbranth » Mon Dec 25, 2017 5:22 pm

Some added information on the Beck/Arnley switch. I tested it on the bench and it closed at 222 degF and reopened at 194 degF.
Terry

1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750

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5speed
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #80 by 5speed » Mon Dec 25, 2017 6:24 pm

I replaced my factory switch with one similar but didn't wire in a relay..
When I attempted to test it by letting the bike idle the fan never came on..but the bike temp gauge never got anywhere close to running hot..
Should I add a relay do you think..just to be safe?
1982 1100 std.
1976 GoldWing. running but not on the road
2002 Shadow American Classic (the boss's ride)
1983 Shadow 500. (sold)
1978 Goldwing. future cafe project.

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desertrefugee
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #81 by desertrefugee » Mon Dec 25, 2017 7:43 pm

5speed wrote:I replaced my factory switch with one similar but didn't wire in a relay..
When I attempted to test it by letting the bike idle the fan never came on..but the bike temp gauge never got anywhere close to running hot..
Should I add a relay do you think..just to be safe?


Depends on what the switch is rated for. Some are 5A and some are 30A (with everything in between). I don't know what the factory switch is rated at, but Honda apparently didn't think a relay was necessary. Just another potential component failure in the fan's path, I'd think.
'97 Valkyrie, '78 GL1000

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tlbranth
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #82 by tlbranth » Mon Dec 25, 2017 8:54 pm

Nobody seems to want to fork over power specs for this switch. I'm going by Roady's experience and the fact that the pins are pretty miniscule. A relay can't hurt and if the switch is rated at less than 4 amps it'll definitely help. Relays are incredibly reliable. My GL1500 has hundreds of them and nary a failure in 140,000 miles. The splices you make could be a weakness, so do them well. But I wouldn't sweat the relay.
Terry

1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750

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5speed
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #83 by 5speed » Mon Dec 25, 2017 9:30 pm

tks. I will add it to the list. :)
1982 1100 std.
1976 GoldWing. running but not on the road
2002 Shadow American Classic (the boss's ride)
1983 Shadow 500. (sold)
1978 Goldwing. future cafe project.

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Rednaxs60
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Re: Fan thermo switch; is this right? (cheap FIX?)

Post #84 by Rednaxs60 » Tue Dec 26, 2017 10:01 am

Found this schematic for a rad fan relay and manual switch (optional):
fancontrol_copy.jpg


Cheers
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