Fan Amps

[RipperXX]

Ok I am a few states away from my car right now and my old man is wiring up some slim line fans on my car. He has both slim lines wired up to the passanger side plug. Which means there like on a toggle switch right now since I removed my A/C. This sucks and I dont want them that way. Plus I am worried they might over load something since I dont know how many amps that relay etc. can handle.

What I need to know is the brass box on the drivers side fan, wtf does it do? There are four pins in the drivers side plug and I need to know 1. Is that brass box important to them coming on automaticly or for anything? And 2. which two pins on that plug power that fan.


Thanks

 

[Defiant]

http://www.dsmtuners.com/forums/showthread.php?t=55523

 

[9!'clipseDOHC]

Bringing this thread back from the dead. Does anyone know the number of amps the 1g stock passenger side (main radiator) fan pulls? I've been searching and have been unable to turn up anything. I was going to test it myself but my multimeter can only check up to 10 amps and I'm pretty sure it more then that.

The reason I want to know is to see if I can use this adjustable fan controller but it only supports up to 25 amps.

 

[luv2rallye]

Well there's no way it will draw anywhere near 25A. Even my 2g passenger side draws 9.5A on high.

 

[9!'clipseDOHC]

Well there's no way it will draw anywhere near 25A. Even my 2g passenger side draws 9.5A on high.

Awesome! Thanks for the response! I also have a single CX/PR slim fan on it as well but I figured that one wouldn't pull much, I was just worried about the stocker. I'm going to go for it then!

 

[Palmetto_TSi]

Pretty easy on a DC motor. OHM out the motor. Divide the ohms you get by the running voltage (@14.5v). That will give you the exact current that particular fan draws.

Well, this is assuming you have a multi-meter. I forget, not everyone has one.

 

[luv2rallye]

Pretty easy on a DC motor. OHM out the motor. Divide the ohms you get by the running voltage (@14.5v). That will give you the exact current that particular fan draws.

Actually current is voltage divided by ohms! But for a motor with windings that have inductance, that only gives initial surge current - not average steady state current.

 

[Palmetto_TSi]

Actually current is voltage divided by ohms! But for a motor with windings that have inductance, that only gives initial surge current - not average steady state current.

Wow you can almost tell it's been 10 years since I actually did that. I used to keep the pie chart in the front of my brain. Anyhow, the inductance in a fan that small isn't going to make that big a difference in stable current in a 14v circuit. We aren't talking about a 700hp 400v DC motor. Plus, keep in mind the OP is trying to make sure the controller he wants will handle the job. That would have to include startup current.

 

[9!'clipseDOHC]

So measure the Ohms (I do have a DMM by the way, just don't know all the in and outs of how to use it) and divide the a volts by that. Volts/Ohms = Amps?

 

[Palmetto_TSi]

right... That should get you plenty close enough. I don't know if you know, but ohms is the horseshoe looking symbol. A lot of people don't know so I just thought I would go ahead and throw it out there.

 

[blizz99]

So can you wire both fans into the passenger side plug?

 

[9!'clipseDOHC]

right... That should get you plenty close enough. I don't know if you know, but ohms is the horseshoe looking symbol. A lot of people don't know so I just thought I would go ahead and throw it out there.

Ok, thanks!

So can you wire both fans into the passenger side plug?

I've been running two slim fans off just the main (passenger side) plug for the last year or so. I was just making sure that it wasn't too much for the adjustable controller I'm getting.

 

[luv2rallye]

So measure the Ohms (I do have a DMM by the way, just don't know all the in and outs of how to use it)

http://www.dsmtuners.com/forums/articles-electrical-wiring/404574-multi-meter-usage-primer.html

 

[RipperXX]

9!'clipseDOHC, did you ever figure out what the stock fans amp draw is on the 1g?