fan control ?

elturbonitroso · Post by **elturbonitroso** » Tue Apr 25, 2006 3:57 am

Hi guys i have a ? im using -led 18 to control my fan .my? is if the led have to turn on when the fan is on or not.

elturbonitroso · Post by **elturbonitroso** » Tue Apr 25, 2006 4:13 pm

nobody

Fastest95PGT · Post by **Fastest95PGT** » Wed Apr 26, 2006 7:07 am

The LED should only turn on when the fan is activated.

Did you change LED18 to Output 4 in the Code Config screen? Does your fan turn on when it should?

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 1:22 pm

yes i change led 18 to output 4 in the code configuration.and no the fan dont turn on. I took the sguirt out of the car and doing a test on my bench with the stim the led is on all the time.but when when the fan suppost to turn on the led turn off any idea of what could cause this.

mobythevan · Post by **mobythevan** » Wed Apr 26, 2006 1:29 pm

What is the rest of the circuit you are using led18 to drive? Just a relay for the fan?

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 1:41 pm

yes I just did what everybody said to just fit a wire from the - side of the led to lets said i use x13 to output and from x13 to the relay pin 85,86 and 30 to 12v and 87 to the fan.

mobythevan · Post by **mobythevan** » Wed Apr 26, 2006 1:55 pm

And the other side of the fan?

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 2:02 pm

pin 87 from the relay to the + of the fan and the other wire that i have free from the fan to ground and the 1n4001 from 85 to 86 pins in the relay the banded side is looking to pin 86.

mobythevan · Post by **mobythevan** » Wed Apr 26, 2006 2:09 pm

OK, just making sure, sounds like its time to break out the multi meter and check voltage at the relay and fan. Make sure the relay turns on, maybe its bad. Test the fan and test the relay. Sounds like you have it hooked up correctly. I used a relay from a camaro once and the fan fan drew too much current and burned it out after only a couple runs.

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 2:17 pm

im thinking that the problem is in the squirt but i will check the relay and the fan.

mobythevan · Post by **mobythevan** » Wed Apr 26, 2006 2:21 pm

You added the 1k resistor across the LED right? That is the only other thing I see.

like this:

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 2:34 pm

no. but nobody told me that i have to add nothing they just told me to just fit a wire from the -side of the led to 1 of the output x11,12,13 or 14. where i have to put the 1k resistor

mobythevan · Post by **mobythevan** » Wed Apr 26, 2006 3:35 pm

I am not sure you have to put it on, you'll have to look on your board a fit it in like the picture shown above, from the - side of the led to the other side of the 330 ohm resistor. Why did we need this again? its been a long day.

elturbonitroso · Post by **elturbonitroso** » Wed Apr 26, 2006 7:24 pm

so i need to add a 1k resistor from - side of the led to R24.

Fastest95PGT · Post by **Fastest95PGT** » Thu Apr 27, 2006 5:25 am

I don't see why you would need that 1k resistor nor have I ever installed one. All of my boards have tested out fine on my car as well.

Post by **jsmcortina** » Thu Apr 27, 2006 6:10 am

You do not need the illustrated 1k resistor when using the output as fan control. That is only relevant for an ignition output going to a module.
You must though, install the 1N4001 across the relay contacts to prevent damage to the transistor.

James

mobythevan · Post by **mobythevan** » Thu Apr 27, 2006 8:05 am

That is only relevant for an ignition output going to a module.

Thanks James, it didn't seem to be needed for fan control.

elturbonitroso · Post by **elturbonitroso** » Thu Apr 27, 2006 12:31 pm

ok i change Q10 looks like thats my problem i will let you guys know.

elturbonitroso · Post by **elturbonitroso** » Thu Apr 27, 2006 6:25 pm

Q10 was the problem i was using a ztx-450 now a 2N2222A everything looks fine in the stim lets see in the car.thanks guys.