D3 fans stuck "on"
12-11-2016, 01:11 PM
#1
Drifting
Thread Starter
D3 fans stuck "on"
Posted in the tech section but maybe here is better.
06 Z06 with eforce. After a heck ride home in heavy snow the other day and kamakaze run up to my driveway with lots of trac control stepping in, my fans just stayed on after I shut down engine. Noticing the temp was under 180 degrees, I felt radiator and that was cool too.
I have to think this is related since it happened at the same time.
I pulled fuses, fans went off, disconnected battery, reconnected, replaced fuses and the dual fans still ran. Seems like full speed but cant tell exactly.
Then next morning went out in 28 degree F weather, installed fuses and the fans still come on even without engine being started at all.
Can the ECM command the fans to run full time if malfunctioning? Even with engine off?
Ill see if these fans use relays but dont think so. The main power is drawn from separate wires attached to battery post under hood. (Z06 battery in trunk) Thats where the dual 30 amp inline fuses are.
If anyone has had similar experience or any suggestion Im open to hear it.
06 Z06 with eforce. After a heck ride home in heavy snow the other day and kamakaze run up to my driveway with lots of trac control stepping in, my fans just stayed on after I shut down engine. Noticing the temp was under 180 degrees, I felt radiator and that was cool too.
I have to think this is related since it happened at the same time.
I pulled fuses, fans went off, disconnected battery, reconnected, replaced fuses and the dual fans still ran. Seems like full speed but cant tell exactly.
Then next morning went out in 28 degree F weather, installed fuses and the fans still come on even without engine being started at all.
Can the ECM command the fans to run full time if malfunctioning? Even with engine off?
Ill see if these fans use relays but dont think so. The main power is drawn from separate wires attached to battery post under hood. (Z06 battery in trunk) Thats where the dual 30 amp inline fuses are.
If anyone has had similar experience or any suggestion Im open to hear it.
12-11-2016, 04:31 PM
#2
Drifting
Thread Starter
OK I disconnected the factory harness and these fans still stuck on. The pwm controller is the culprit.
Ill see what d3 does or try to source a more heavy duty model.
Ill see what d3 does or try to source a more heavy duty model.
12-11-2016, 05:51 PM
#3
Drifting
The following users liked this post:
Arctic Vette (12-11-2016)
12-11-2016, 06:18 PM
#4
Replace relay
12-14-2016, 03:25 AM
#6
Drifting
Thread Starter
These are very good fans. Arctic is right except that it isnt actually a simple relay. It is a pwm controller which is still in essence a relay....just not as easy to get.
Anyway, D3 hooked me up and alls good. They are sending me another one.
I began a writeup as to why this setup is so good but it didnt save so ill get to that another time.
Im betting problem is going to be solved and it seems no one else has had this issue. There is very little to go wrong with these and the design is an improvement over oem in a few ways.
Thanks gentlemen
Anyway, D3 hooked me up and alls good. They are sending me another one.
I began a writeup as to why this setup is so good but it didnt save so ill get to that another time.
Im betting problem is going to be solved and it seems no one else has had this issue. There is very little to go wrong with these and the design is an improvement over oem in a few ways.
Thanks gentlemen
12-14-2016, 08:36 PM
#7
These are very good fans. Arctic is right except that it isnt actually a simple relay. It is a pwm controller which is still in essence a relay....just not as easy to get.
Anyway, D3 hooked me up and alls good. They are sending me another one.
I began a writeup as to why this setup is so good but it didnt save so ill get to that another time.
Im betting problem is going to be solved and it seems no one else has had this issue. There is very little to go wrong with these and the design is an improvement over oem in a few ways.
Thanks gentlemen
Anyway, D3 hooked me up and alls good. They are sending me another one.
I began a writeup as to why this setup is so good but it didnt save so ill get to that another time.
Im betting problem is going to be solved and it seems no one else has had this issue. There is very little to go wrong with these and the design is an improvement over oem in a few ways.
Thanks gentlemen
12-14-2016, 09:05 PM
#8
Let us know if replacing that works and clears up your issue ..
12-17-2016, 04:31 AM
#9
Drifting
Thread Starter
Yes will do...20 degrees out there but Im not waiting any longer! Im the only guy on the street with no garage but the only guy who is into mechanics.
What I wanted to say about the D3 fans is that they have made the design much better. The power from fans comes from nice fat low gauge wires with heavy duty dual 60 amp inline fuses. Already cut to length with terminals to be routed to the battery post on the (If you already have several things on the block then get a marine grade bus bar ahead of time you do not want to have the setup like I am attaching image to it just doesnt seem to work as well) under hood fuse block. Then another wire to ground right by the terminal near the lift support.
Then, just plug into the factory harness.....
What else is do I think is better? Well, you know how the factory harness is a bit wimpy and can even get hot enough to melt running the lower draw OEM fan? This issue of fan plug overheating and subsequent voltage drop is eliminated by installing the D3 fans since the OEM plug is basically now just sending signal to a PWM unit (or relay for old school folks). The fans still operate like oem, commanded by the ECU. The high load is no longer on the OEM connector.
What I wanted to say about the D3 fans is that they have made the design much better. The power from fans comes from nice fat low gauge wires with heavy duty dual 60 amp inline fuses. Already cut to length with terminals to be routed to the battery post on the (If you already have several things on the block then get a marine grade bus bar ahead of time you do not want to have the setup like I am attaching image to it just doesnt seem to work as well) under hood fuse block. Then another wire to ground right by the terminal near the lift support.
Then, just plug into the factory harness.....
What else is do I think is better? Well, you know how the factory harness is a bit wimpy and can even get hot enough to melt running the lower draw OEM fan? This issue of fan plug overheating and subsequent voltage drop is eliminated by installing the D3 fans since the OEM plug is basically now just sending signal to a PWM unit (or relay for old school folks). The fans still operate like oem, commanded by the ECU. The high load is no longer on the OEM connector.
Last edited by speedz06; 12-23-2016 at 09:26 PM.
12-22-2016, 09:42 PM
#11
Awesome!
02-08-2017, 08:50 PM
#12
Yes will do...20 degrees out there but Im not waiting any longer! Im the only guy on the street with no garage but the only guy who is into mechanics.
What I wanted to say about the D3 fans is that they have made the design much better. The power from fans comes from nice fat low gauge wires with heavy duty dual 60 amp inline fuses. Already cut to length with terminals to be routed to the battery post on the (If you already have several things on the block then get a marine grade bus bar ahead of time you do not want to have the setup like I am attaching image to it just doesnt seem to work as well) under hood fuse block. Then another wire to ground right by the terminal near the lift support.
Then, just plug into the factory harness.....
What else is do I think is better? Well, you know how the factory harness is a bit wimpy and can even get hot enough to melt running the lower draw OEM fan? This issue of fan plug overheating and subsequent voltage drop is eliminated by installing the D3 fans since the OEM plug is basically now just sending signal to a PWM unit (or relay for old school folks). The fans still operate like oem, commanded by the ECU. The high load is no longer on the OEM connector.
What I wanted to say about the D3 fans is that they have made the design much better. The power from fans comes from nice fat low gauge wires with heavy duty dual 60 amp inline fuses. Already cut to length with terminals to be routed to the battery post on the (If you already have several things on the block then get a marine grade bus bar ahead of time you do not want to have the setup like I am attaching image to it just doesnt seem to work as well) under hood fuse block. Then another wire to ground right by the terminal near the lift support.
Then, just plug into the factory harness.....
What else is do I think is better? Well, you know how the factory harness is a bit wimpy and can even get hot enough to melt running the lower draw OEM fan? This issue of fan plug overheating and subsequent voltage drop is eliminated by installing the D3 fans since the OEM plug is basically now just sending signal to a PWM unit (or relay for old school folks). The fans still operate like oem, commanded by the ECU. The high load is no longer on the OEM connector.