Cooling Fans
Cooling Fans This happened to me earlier today, I saw something on it recently..
For some reason they stopped working. The Relay's were good, the Fuses were good, everything was good, even the Sensor/Switch on front of the Water Pump. I fixed it by splicing the wire to the Fuse/Relay Box there to one side of the Fan Circuit, and then grounding the other side. They come on and run constantly when the Key is turned to the on position. I am putting in in-line Fuses and a switch, so then it will be good. As far as I am concerned, it fixed that problem. It was a little work, but it's done and easy to troubleshoot.
For some reason they stopped working. The Relay's were good, the Fuses were good, everything was good, even the Sensor/Switch on front of the Water Pump. I fixed it by splicing the wire to the Fuse/Relay Box there to one side of the Fan Circuit, and then grounding the other side. They come on and run constantly when the Key is turned to the on position. I am putting in in-line Fuses and a switch, so then it will be good. As far as I am concerned, it fixed that problem. It was a little work, but it's done and easy to troubleshoot.
Can you get any pics of your handy work? You posted on my other thread so you know i'm having some issues with the fans not turning on. It's incredible how vital those things are to cooling!
So you wired in differently than if you had properly working fans and wanted a manual fan switch? I spliced my switch into the wires coming out of the PCM I think. I had no fan issues, just wanted to manually work my fans.
I used a black plastic switch for mine, it was a double throw double pole type, don't know for Merv's mod, but normally you have to wire up the high and low speed to the switch. I mounted the switch in the little panel that holds the cig lighter. I'd post a pic, but my shifter handle is in the way.
I used a black plastic switch for mine, it was a double throw double pole type, don't know for Merv's mod, but normally you have to wire up the high and low speed to the switch. I mounted the switch in the little panel that holds the cig lighter. I'd post a pic, but my shifter handle is in the way.
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Originally Posted by ock462
Hey I had that same problem. I actually wired mine to my fog light switch since I don't have any fog lights.
The wires I used are under the Fuse box there.. I spliced into the orange 12g wire going to the Fan Fuse, and used the 2 wires coming off of the Fans going to that box(did a little wire tracing). Then I grounded the 2 other wires on the fans that weren't used.
On the other side of that Orange wire is a Brown wire. That one is hot when the Fuse is in, so I spliced into that one with the Blue and Green wires which are connected to the Relays, and eventually go over to the plug that goes to the Computer. I made them Hot wires, and took the ones out on the Harness side of that Plug. I did this so I can have some extra power wires there for when I do my LSX Conversion. The Brown one there also goes over to the other side, so I have 3 extra hot wires there now that can come in handy.
My *** needs a second job..
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TECH Regular
Joined: Oct 2005
Posts: 431
Likes: 1
From: Lexington, NC
Merv, I dont know if you have seen this or not. Someone sent this to me once and I would still like to do at some point to my car.
Fan Switch
-bryan
Fan Switch
-bryan
TECH Regular
Joined: Oct 2005
Posts: 431
Likes: 1
From: Lexington, NC
So I was thinking more about doing this to my car when I do my gauges. That link I posted says to tap into the line from the PCM. If I do that, will that allow the fans to come on when the PCM says to do so?
Why couldn't I just find a powersourse, like the cig lighter, and just run juice from it to the fans, through a switch? Would there be any thing against doing that?
-bryan
Why couldn't I just find a powersourse, like the cig lighter, and just run juice from it to the fans, through a switch? Would there be any thing against doing that?
-bryan
The deal with the manual fan switch is, I believe is that you provide it a ground.
You will need a double pole double throw switch. Yes if you wire it up like the shbox diagram above, your fans will still work like normal if you forget to turn them on yourself.
I did this and love it, I flip them on when I'm stuck at a red light or waiting in line at the track. My temp gauge rarely sees above 180 anymore.
I didn't install the LEDs, so I can't tell you about that, I just remember that when I flip the switch up I have it for high speed fans, and when I flip it down its for low speed.
You will need a double pole double throw switch. Yes if you wire it up like the shbox diagram above, your fans will still work like normal if you forget to turn them on yourself.
I did this and love it, I flip them on when I'm stuck at a red light or waiting in line at the track. My temp gauge rarely sees above 180 anymore.
I didn't install the LEDs, so I can't tell you about that, I just remember that when I flip the switch up I have it for high speed fans, and when I flip it down its for low speed.
Mine both spin on high when the Key comes on, it works for me.. I used them Relay Wires as extra hot wires anyways. Those are nice to have extra of.
LOL, words for the wise; before you waste hours trying to get your fans to turn on check your fuses! 
That's all it was, soon as I replaced it the primary came right on. Did that already there clown.. and the whole Circuit was messed up somewhere. Why you got to be that guy..J/P
Originally Posted by sworaz
LOL, words for the wise; before you waste hours trying to get your fans to turn on check your fuses! That's all it was, soon as I replaced it the primary came right on.
Reckon there was a short in the pigtails? When I bought my Z, someone had hard wired the fans with a manual switch and cut the factory harnesses all to ****. While I was tearing it apart, I discovered the water pump temp sensor was broken off so the dummies did all that mess instead of just replacing the sensor. I'm not entirely sure I've got their mess straightened out since I have only put about 50 miles on that car. That wiring diagram is great though so I might have to use it if I can't make it work the way I want it to.
I'm not entirely sure I've got their mess straightened out since I have only put about 50 miles on that car. That wiring diagram is great though so I might have to use it if I can't make it work the way I want it to.
Originally Posted by the_merv
Did that already there clown.. and the whole Circuit was messed up somewhere. Why you got to be that guy..J/P
, lol, yeah i'm the clown because I didn't check my fuses and that's all it was. I think I still want to get some type of manual switch hooked up, for when I decide to really drive it hard! 