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06-14-2007, 02:43 PM
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#26
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Relay looks like this:
Buy a kit like this from Summit. Then you get a switch, a relay, some wire, a breaker & a relay. Get another relay locally, and you will be well on your way.
You may be able to cobble it together cheaper, but not much.
Wiring Diagram
*purple wire needs to be fused at source
*I might use breakers instead of links for the main power - not fuses though.
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Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
Last edited by BonzoHansen; 06-14-2007 at 02:48 PM.
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06-14-2007, 02:47 PM
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#27
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Stalker
Join Date: Aug 2004
Posts: 12,077
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billy, yeah, there are many ways to possibly wire it. and like in the diagram bonzo showed the grounds go to a temp switch which i didnt even include in my schematics.
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06-14-2007, 02:49 PM
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#28
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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I like grounding the temp switch. That is what GM does.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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06-14-2007, 02:51 PM
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#29
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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If I was using fan switches, I'd do this, replacing the ECM leads for fan switches (one in head, the other in the water neck or something).
I'm loving my DCC controller, though.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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06-14-2007, 02:51 PM
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#30
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Stalker
Join Date: Aug 2004
Posts: 12,077
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Quote:
Originally Posted by BonzoHansen
I like grounding the temp switch. That is what GM does.
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yeah thats a good idea. i just completely forgot about them lol
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06-14-2007, 02:52 PM
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#31
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Quote:
Originally Posted by SmokingSS
yeah thats a good idea. i just completely forgot about them lol
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Makes rigging a manual switch easier too - no extra fuse.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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06-15-2007, 03:58 PM
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#32
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Join Date: Sep 2004
Location: Hamilton Square
Posts: 252
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okay -- that works, thanks for that diag.
So all I need to get now is some 10g wire and a relay. Again, as I said before, not sure what kind of relay to get. Went to the radio shack website, and came up with this:
http://www.radioshack.com/search/ind...gkw=relay&sr=1
Which one do I choose?
Last edited by bokey; 06-15-2007 at 04:01 PM.
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06-15-2007, 05:42 PM
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#33
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Stalker
Join Date: Aug 2004
Posts: 12,077
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Last edited by V; 06-15-2007 at 05:42 PM.
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06-19-2007, 10:46 AM
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#34
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Join Date: Sep 2004
Location: Hamilton Square
Posts: 252
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Quote:
Originally Posted by BonzoHansen
I thought you wanted to do it right. 
If you use no relay, the switch is part of the circuit and needs to handle the amperage-it is all part of the circuit. You'll need pretty big wire too (8g), to make up for the increased length and the associated volatage drop.
Why wouldn't you want to use a $5 relay? If you use one, you can run about 4' of heavy wire (10g or 12g), and run small wire to your switch. |
After talking to several mechanics (one of which is an 20+ year mechanic) my original though of just using a switch and no relay is correct.
A relay is a switch ... unless there is a sensor (or something else) that dictated when the fan turns on or not there is no need for one. Why would one hook up a switch just to turn another on another switch?
You don't need 8g wire... not even close (maybe if i'm going to wire something in a house with a 120v). I am running 12 g wire to a 30A switch and have not had a single problem. The switch DOES NOT get hot, neither do the wires.
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06-19-2007, 11:05 AM
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#35
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Stalker
Join Date: Aug 2004
Posts: 12,077
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i still recommend a switch.. but its your car.
and i also doubt those mechanics went to Stevens Tech for electrical engineering..
I will say, in the car hobby, everyone has different opinions and thats fine, most of it is trial and error or past experiences. ive seen issues a lot with high amp switched circuits so that formed my veiws. If someone never saw an issue, they woudlnt have a reason to question it. Just always keep and eye on the switch you are using and the connections, if you see any browning of the terminal connectors, change it asap.
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06-19-2007, 12:04 PM
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#36
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Yup, local wrench is smarter then the OEs. And we just fell off turnip trucks.
Good luck.
__________________
Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
Last edited by BonzoHansen; 06-19-2007 at 12:11 PM.
Reason: I felt like it
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06-19-2007, 02:12 PM
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#37
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Join Date: Sep 2004
Location: Hamilton Square
Posts: 252
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Quote:
Originally Posted by BonzoHansen
Yup, local wrench is smarter then the OEs. And we just fell off turnip trucks.
Good luck.
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never said that... but assume away
What I am saying is that I would take my best friend's evaluation (A tech at Ford) and my pops evaluation (20+ year professional mechanic at Ford). He also took many courses in electrical engineering.
Smoking SS:
Been keeping an eye on the switch and the wires and never once have they got hot. Had the fan on for an hour and a half straight the other day and no issue.
Last edited by bokey; 06-19-2007 at 02:13 PM.
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06-19-2007, 03:01 PM
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#38
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Quote:
Originally Posted by bokey
never said that... but assume away
What I am saying is that I would take my best friend's evaluation (A tech at Ford) and my pops evaluation (20+ year professional mechanic at Ford). He also took many courses in electrical engineering.
Smoking SS:
Been keeping an eye on the switch and the wires and never once have they got hot. Had the fan on for an hour and a half straight the other day and no issue.
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bokey- Their skills as automotive specialists are not in question here.
But to value their ideas over that of teams of electrical engineers that design these circuits may be a bit of a mistake.
It's not just the fact that the relay is switched, it's also that the relay prevents against voltage drop. Don't believe me?  Take a look at "headlight upgrade kits" for old muscle. They are all wiring upgrades that include a relay.
http://www.madelectrical.com/electri...adlights.shtml
Now this is a worst case scenario but it kind of shows what I mean...
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