[ddarkslayer]

I just installed a mishimoto fan to my car and when I first bought the car the previous owner decided to remove the fan relay and run a wire from the the fan all the way back to a switch that dangles next to my steering wheel and as I was working on it. the positive power wire that was open touched the waterpump pulley and it sparked a little and now the fan doesn't work the fan runs all the way back through a switch and in to the fuse box. the wire doesn't have a fuse it connects in to a fuse terminal.

I'm trying to connect the fuse and splice it to my ignition power.
so the real question

how many amps of fuse should I use 15,20, or 30?

 

[ddarkslayer]

Please anyone its kind of important

 

[mxnate116]

so your powering the fan off the ignition through a switch only?

you need to use the switch to trigger a relay that has a direct connection with the battery otherwise it will probably burn up the switch. get a 30 amp relay and wire it up.

 

[Trick Tuners]

so your powering the fan off the ignition through a switch only?

you need to use the switch to trigger a relay that has a direct connection with the battery otherwise it will probably burn up the switch. get a 30 amp relay and wire it up.

Yup. Always run a fuse! I'm betting that it was fused someplace, otherwise the wire would have gone up in smoke if you shorted it.

 

[ddarkslayer]

so your powering the fan off the ignition through a switch only?

you need to use the switch to trigger a relay that has a direct connection with the battery otherwise it will probably burn up the switch. get a 30 amp relay and wire it up.

It goes through a fuse and a a toggle switch

 

[mxnate116]

still that much amperage through a switch is not a smart idea

 

[ddarkslayer]

still that much amperage through a switch is not a smart idea

do you know what a perfect relay or relay kit would be

 

[mxnate116]

any 30 amp relay would work, you could also get a temp operated fan control

 

[ddarkslayer]

hows this kit Perma-Cool 19002 - Perma-Cool 30 Amp A/C Relay Kits - Overview - SummitRacing.com

 

[mxnate116]

thatl work

 

[ddarkslayer]

cool I had that switch on for about a year do you think it was the switch that went out?

 

[mxnate116]

possibly, why do you have it run off just a switch why dont you have it turn on when it gets to a certain temp?

Flex-a-lite 31147 - Flex-a-lite Adjustable Electric Fan Controllers - Overview - SummitRacing.com
just add relay

 

[ddarkslayer]

is that a tempurature sensor that turns on the fan after in hits certain tempurature

 

[mxnate116]

yeah it will turn on at the temp you set it at

 

[dennislv]

hows this kit Perma-Cool 19002 - Perma-Cool 30 Amp A/C Relay Kits - Overview - SummitRacing.com

That has got to be one of the biggest rip offs I've seen in a while! You can get the same relay at autozone for $6, a pack of crimp connectors for $3 and find your own screw.

Honestly, I think $6 at autozone is a joke too... Those relays are $1!!!

 

[ddarkslayer]

That has got to be one of the biggest rip offs I've seen in a while! You can get the same relay at autozone for $6, a pack of crimp connectors for $3 and find your own screw.

Honestly, I think $6 at autozone is a joke too... Those relays are $1!!!

what is the difference between fuses and relays

 

[dennislv]

A fuse prevents a circuit from drawing too much current. For example, you put a 15amp fuse on your accessories, and if something draws more than that, it blows the fuse to protect whatever is connected to that circuit.

A relay lets you switch a heavy load, like a fan, or headlights, with a small tiny switch. Unlike a switch in your house, where the actual power that the lights are drawing runs through it, you use a relay to signal a remote activated switch, to switch that heavy load.

Check out http://dwapi.com/mustang/relay.pdf for details about a relay. For a fuse, How Does a Fuse Work? | eHow.com

 

[dennislv]

BTW that link up there on my site http://dwapi.com/mustang/relay.pdf will show you how to wire up the $6 autozone relay. You can goto any parts store, alarm shop or stereo shop and buy a relay and use those instructions

 

[ddarkslayer]

oh okay so a relay is basically a switch for higher loads

 

[dennislv]

More like a remote switch for high loads