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the12volt's install bay
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 Topic: electric fan, wiring check, on/off/on, therm
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superjatt
Joined: January 18, 2012
Location:
California,
United States
Posts: 10 |
| Posted: January 18, 2012 at 3:04 PM - IP Logged |
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Hello I am new to the forum and all the information was found while researching on how to make my electric fans run. My car is a sc300 with a 2jzgte (if it matters) and the fans are from a 2003 is300.
I come here to ask if anyone has suggestions or changes that need to be make to the diagram. My main concern is on the switch itself (in green) the switch came with the diagram noted. Thanks
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Sc300 - 2jzgte |
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offroadzj
Joined: June 03, 2005
Location:
New York,
United States
Posts: 1,240 |
| Posted: January 18, 2012 at 5:13 PM - IP Logged |
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If I'm reading your diagram correctly when that thermal switch closes, it is just going to short your switch out. I'll try to get a correct diagram together tonight. Do you know what amperage each fan pulls?
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Kenny
Former Installation Manager
Circuit City Roadshop
Store #3160
Albany, NY 12205 |
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offroadzj
Joined: June 03, 2005
Location:
New York,
United States
Posts: 1,240 |
| Posted: January 18, 2012 at 5:34 PM - IP Logged |
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Here is a very crude diagram... but it should give you the idea.
___________________________________
Kenny
Former Installation Manager
Circuit City Roadshop
Store #3160
Albany, NY 12205 |
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superjatt
Joined: January 18, 2012
Location:
California,
United States
Posts: 10 |
| Posted: January 18, 2012 at 5:43 PM - IP Logged |
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Hey thank you so much.
To make the digram you gave me gives me either three options. On for always on, Off in the center, And auto the ones that goes to the thermal fan switch?
Also does it matter if 86 is ground vs. 85 being a ground?
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Sc300 - 2jzgte |
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offroadzj
Joined: June 03, 2005
Location:
New York,
United States
Posts: 1,240 |
| Posted: January 18, 2012 at 6:03 PM - IP Logged |
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Yes, the switch should have an input, then a contact for on and for auto. With the above diagram if the switch is on, the fans will be one. If the switch is set to auto it will use the thermal switch to turn them on.
I have never had any issues with which pin (85/86) goes to positive vs ground. I've connected it both ways without an issue.
___________________________________
Kenny
Former Installation Manager
Circuit City Roadshop
Store #3160
Albany, NY 12205 |
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superjatt
Joined: January 18, 2012
Location:
California,
United States
Posts: 10 |
| Posted: January 18, 2012 at 6:50 PM - IP Logged |
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Thank you so much good sir. 100 internets
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Sc300 - 2jzgte |
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offroadzj
Joined: June 03, 2005
Location:
New York,
United States
Posts: 1,240 |
| Posted: January 19, 2012 at 5:57 AM - IP Logged |
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If you want the fans to automatically shut off with the car then take the input for the switch off an ignition source instead of a 12v constant source.
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Kenny
Former Installation Manager
Circuit City Roadshop
Store #3160
Albany, NY 12205 |
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howie ll
Joined: January 09, 2007
Location:
United Kingdom
Posts: 9,717 |
| Posted: January 19, 2012 at 7:18 AM - IP Logged |
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Kenny, ignition to a relay, at least 80 amps switching required, the onrush if both cut in at once can be 80 amps +.
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Amateurs assume, don't test and have problems; pros test first.
Read the installation manual, do a search here for your vehicle wiring. |
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offroadzj
Joined: June 03, 2005
Location:
New York,
United States
Posts: 1,240 |
| Posted: January 19, 2012 at 11:17 AM - IP Logged |
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Maybe I was unclear. I meant to ONLY run the ignition input to the switch... which in turn runs the relays. DO NOT run the ignition to the input of the relays because it will blow your ignition fuse (more than likely).
I was not aware those fans pulled that much amperage. Check the rated draw and if Howie is correct (and he usually is... lol) make sure to get adequate relays to handle the draw.
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Kenny
Former Installation Manager
Circuit City Roadshop
Store #3160
Albany, NY 12205 |
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superjatt
Joined: January 18, 2012
Location:
California,
United States
Posts: 10 |
| Posted: January 19, 2012 at 1:24 PM - IP Logged |
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Ok I will check that as well.
Are you sure that the thermostatic switch is correct? Iv been doing alot more searching and it seems that the switch has two terminals one that goes to a 12v source and one that connects to ground. ?
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Sc300 - 2jzgte |
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