If you have aftermarket electric fans for your ride, this soft start pulse width modulated electric fan controller is an excellent add on. It’s a Soft Start Pulse Width Modulated Electric Fan Controller to keep your coolant temp under control and it is very cool. Pun not intended. Well, maybe it was…. Anyway, this solid state device does away with the relays and soft starts your fans when the temp reaches a certain temp specified by you! I’ve been running it now for about a month and it is really nice to have. My temp level stays rock solid and worries about overheating are long gone.
Hey everybody, Steve here, and I’m excited about today’s video. If you follow the channel you know that I got dual fans and a Griffin radiator couple years ago and this is basically the install with relays and stuff like that. And when I did the video for this I got a comment from a guy who said that I would be better off with a solid state pulsed modulated fan controller. So, what you’re looking at here is a radiator fan controller. But what it has is solid state pulse width modulated fan controls so there’s no relays. So, check out the URL here, autocoolguy.com. So, we’re going to go ahead and install this today.
So objective one is figuring out where to install it and I’m going to go ahead and put it right here. Alright, so the first thing I did was I disconnected the negative battery terminal. I’m gonna take this metal plate out of the way so give me more room and I’m going to take the cover to the fuse box out since that’s what I want to fix the unit too. And it’s just two little hooks that hook into these little holes right there. As soon as you get rid of them and disconnect everything it just comes right out. And this is what we’re after because we’re going to mount right there.
Let’s talk about wiring and I know there’s a lot of wires here but don’t let them scare you because it’s actually very easy. So just think about this. I’ve got two fans and for each fan, I’ve got a red wire and a black wire. Well, the reds simply enough get a 30-amp inline fuse placed in them and the red lines go straight to the battery. The black ones are the return lines and they go to the unit versus fan and then here you just tie this to ground somewhere on the car. So, I’m going to be using that wire for that. Alright So let’s take a look at this side. BAT is for battery, I’m going to have a wire with a 1-amp fuse going straight to the battery. So, IGN is ignition, so you got to find some switch power. I went into the fuse box and I found a fuse that was switch power and I just used a fuse to tap into it so I could put two fuses in one place and that wire will go to IGN. GND is ground, pretty simple, just another ground wire. And then SEN and SEN those are your sensors so these go to the thermostat. AC is optional. Essentially what this wire does is it will run your fans anytime your compressor is engaged. FS is for failsafe, this is an optional one. You could run a wire into the car with a switch and then you could basically turn the fans on and off manually that way. So, it looks scary but it’s really not it’s very, very straightforward.
I got my lower radiator hose right there, that’s the big fat one and essentially, I’m going to cut it and I’m gonna insert this guy right here which is also going to have the sensor in it and then I’ve got a wire the sensor to the two SEN ports on the black box. So, it’s gonna be probably a little bit messy.
For my thermostat, I’m just going to put this in line copper piece in the lower radiator hose and I’m halfway done and now the hard part is getting it into the other side. So, I’m going to do that and then I’ll put the sensor in and I’ll go from there.
Okay, so it might want to fight you a little bit but that’s what where we’re at after right there. Okay, so I’ve wired up the sensor and now I’m going to go ahead and pop it in right there and run the wire up to the auto cool guy unit.
I have finished all my wiring and I’ve got the auto cool unit attached to the cover of my fuse box and I’m ready to start wiring stuff up, start testing.
So, I got my grounds all hooked up on this side and I got everything else hooked up on this side. So, I’ve got the unit installed and I’ve got everything wired and now there’s nothing left to do besides test it. So, step one is to fire it up and let it get warm. Alright, so it’s been about five minutes, temperature is up, at least off of 160 and let’s go see what the outflow temp is. So currently 80 degrees, 81; I’ll let that get a few more degrees hot and then we’ll mess with it.
At this point, the car is pretty much warmed up, there are no lights on there yet and we’re measuring the outflow here. This is the upper radiator hose here and just for way of comparison and this is where the thermostats at so between 185, is probably right around 200 maybe so I’ll let the fans start coming on now. And now I’m going to press the blue button and start lighting up these things. So here we go and I can hold it down to adjust the fan speed to however fast I want the fans to be running. I figure let’s let them go as fast as they can so there we go, the fans are running. Alright, so these fans are going to speed up and slow down based on the outflow temperature because that’s where my thermometer is and they have slowed down substantially down to two little dots and that’s the RPM speed of the fans. And if we check out flow, it’s maintaining an output temperature right around 100 degrees, take less than 100 degrees. The fans are off so it’s cooled it all the way back down to 90. The outflow temp has been reduced to 93-92 and it’s not running right now because it doesn’t have to run right now. If I wanted to allow it to get hotter that’s when I press the red button. This placement is not ideal but you’re supposed to just set it once and forget it but I’m gonna hold down this red button for a while that should program it to allow itself to get warmer before the fans come on.
Because I hit that red button, I basically said let it get warmer and it’s at 108, 110 and it still hasn’t come on yet. So, it’s really let things get a lot hotter this time cuz I told him not to come on. 15 on the outflow, still no lights. Alright, so 119 it came on.
I’ve been playing with this thing getting it dialed in and I’ve got it to where I want it to come on. I want it to start coming on as it gets to around 104, 105. So right now you see it’s at 101, it’s not on at all. So, what this thing is doing is it’s totally regulating itself based on the outflow temperature that I chose. I basically said, hey, turn on right around 105 and what do I got over here? I’ve got two dots, 20% on the fans, so the fans are at 20% and if I can hold this thing steady and I’ve asked it to come on and start doing its thing right around 105 so right now it’s hovering around 100 so it’s not on at all, she fans aren’t running so eventually it’s going to get hot again and when it hits 105 the unit is going to come back on, tell the fans to spin and cool it down. And inside the temp says it’s right around 190 so it’s regulating at exactly where I want to regulate at.
There’s one of the things show you and that is that when I turn the air conditioner on so the compressor goes on, I already hear the fans come on, let’s go see what’s going on with the… So, the fans are lit up 90%. So just by turning on the air conditioner it’s going to cause the fans to run much faster. And make sure I hold the laser beam on the right thing. There’s the laser beam on the right thing right there. These fans are really, really cool and stuff down and it’s actually allowing them to slow down as it gets cooler.
So, in closing, I think it’s a great little device. You know, it lets the user determine when the fan comes on and when they go off and it also soft starts the fans said that they don’t go you know onto 100% right away. So all in all, I got to say I’m very impressed with this little unit. It’s great for the user to be able to define when the fans come on when they go off and it allows you to maintain a rock-solid radiator temperature that you want to maintain and the fans don’t just come on at 100% and then click off based on 1 thermostat number. It was very easy to install, the instructions were very straightforward and the guy His name is Daryl, if you call him and ask him any questions he’s a great guy, he’s very, very quick to return calls, answer any questions, you can call or email and just all around a pleasure to do business with. So, if you want to get your hands on one of these things go to autocoolguy.com.
I’m Steve, I hope you enjoyed the video if so, please like comment and subscribe and by the way, hit the little bell if you want to receive notifications every time I come out with a new video because I’ve got a whole bunch of them coming down the pike. So anyhow, this is Steve signing off. See you
For more info, check out the manufacturer at http://www.autocoolguy.com