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Old 09-21-2010, 03:26 AM   #1  
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Default DIYPNP - Can't get WLED output to turn on radiator fan

So I wanted to use electronic boost control and realized that the only output I had available to do that was PA0 which I had been using to turn on my radiator fan. So I switched the PA0 output to the IN point for boost control and it works great. I didn't get to play with it long, though, because I noticed my CLTs were well past the allowed 207 when I pulled over to play with settings. Sure enough, no radiator fan.

I have the WLED output at the top of the board (near the DB9) connected to the IN on RELAY 1. I copied settings over from PA0 to WLED (1 and 1, coolant > 207, hysteresis 10, no additional conditions) but the fan just isn't turning on.

I made sure the connection for WLED was good from the Microsquirt to the IN port on the relay. 0 ohms. All I did was move the wire. Any suggestions?
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Old 09-21-2010, 03:44 AM   #2  
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Do you have a pullup on WLED?
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Old 09-21-2010, 04:07 AM   #3  
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Nope. I read somewhere on here that it wasn't used except for ignition purposes.
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Old 09-21-2010, 09:35 AM   #4  
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Use PA0 for fan, then PT7 for boost...
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Old 09-21-2010, 09:42 AM   #5  
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maybe try reducing hysteresis from 10 to 2

I have

PM5 is green
power on value = 1
trigger value = 1
output channel = coolant > 196
hysteresis 2

I'm still using PAO for boost, WLED for fan, ALED for VICS
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Old 09-21-2010, 09:45 AM   #6  
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why? I like to turn them on at 200 and off again at 190.

power on value should be 0.
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Old 09-21-2010, 10:13 AM   #7  
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Try using a much lower coolant turn on value until you get your settings dialed in. WLED can drive a relay directly; you don't need to run it through a relay circuit on the main board.
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Old 09-21-2010, 01:18 PM   #8  
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Quote:
Originally Posted by Braineack View Post
Use PA0 for fan, then PT7 for boost...
I'm running sequential so I can't do this.

WLED can drive a relay directly; you don't need to run it through a relay circuit on the main board.

^^Will try this before work and post results. I didn't realize WLED could do that. Haha, if I knew how to read, the DIYPNP Outputs page even says that!

Last edited by messiahx; 09-21-2010 at 01:37 PM.
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Old 09-21-2010, 10:33 PM   #9  
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That was the problem. Works just fine driven directly by wled. Thanks for the help!
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