Derale Fans Blew Both 30A Fuses-Wired Right? HELP
07-09-2015, 06:44 AM
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Derale Fans Blew Both 30A Fuses-Wired Right? HELP Ok so I cranked my car for the first time last night, and my fans didn't kick on. I have read other fan threads, and this is what I have done so far.
Now, to begin with I had them wired up wrong where both fans kicked on when I hooked up the battery because I stupidly ran both, the red wires and the yellow wires, to the positive post on the fuse box.
After that I ran the Red wires from the relay to the fuse box post
Yellow wires to the 2 factory fan plugs for the switch (used male spade to plug into the positive wires on the plugs)
I replaced the Derale fuses and holders with new ones from Autozone and ran the orange wires from the relay to the blue wires coming off the fans (positive wires I think)
The ground wires from the fans and the relay I ran to one ground location that I screwed into the frame on the drivers side
Green wires off the relay are cut because I have no AC
Is this right? I feel like I must have a short somewhere because both fuses were blown right away, but maybe those fans just kick up over 30A on startup and that caused them to blow?
Any help will be appreciated
Now, to begin with I had them wired up wrong where both fans kicked on when I hooked up the battery because I stupidly ran both, the red wires and the yellow wires, to the positive post on the fuse box.
After that I ran the Red wires from the relay to the fuse box post
Yellow wires to the 2 factory fan plugs for the switch (used male spade to plug into the positive wires on the plugs)
I replaced the Derale fuses and holders with new ones from Autozone and ran the orange wires from the relay to the blue wires coming off the fans (positive wires I think)
The ground wires from the fans and the relay I ran to one ground location that I screwed into the frame on the drivers side
Green wires off the relay are cut because I have no AC
Is this right? I feel like I must have a short somewhere because both fuses were blown right away, but maybe those fans just kick up over 30A on startup and that caused them to blow?
Any help will be appreciated
07-09-2015, 08:27 AM
#2
Are you able to run directly to the battery for your power? I haven't had an issue with mine. I avoid the battery post since I had a friend that put a HID relay harness and it completely melted. My understanding was the alternator pumps extra voltage or something up there and that was what could cause it.
Just something to try. I've been running mine over a year now going straight to the battery with no issue at all. My fans even stopped working the other day and I instantly thought about this and checked my fuses and they looked the same as the day I dropped them in there. Ended up my ground wire got pulled out somehow.
Just something to try. I've been running mine over a year now going straight to the battery with no issue at all. My fans even stopped working the other day and I instantly thought about this and checked my fuses and they looked the same as the day I dropped them in there. Ended up my ground wire got pulled out somehow.
07-09-2015, 09:39 AM
#4
Find the factory High-speed signal on the ECM (ground), use that to trigger aftermarket relays that are connected to the fans.
The stock wiring can't handle the derale fans, they draw too much. I tried using the factory connectors as well and ended up cutting them off. A buddy helped me wire in two completely separate relays and fuse holders, haven't had an issue since with my fans.
The stock wiring can't handle the derale fans, they draw too much. I tried using the factory connectors as well and ended up cutting them off. A buddy helped me wire in two completely separate relays and fuse holders, haven't had an issue since with my fans.
07-09-2015, 11:10 AM
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Find the factory High-speed signal on the ECM (ground), use that to trigger aftermarket relays that are connected to the fans.
The stock wiring can't handle the derale fans, they draw too much. I tried using the factory connectors as well and ended up cutting them off. A buddy helped me wire in two completely separate relays and fuse holders, haven't had an issue since with my fans.
The stock wiring can't handle the derale fans, they draw too much. I tried using the factory connectors as well and ended up cutting them off. A buddy helped me wire in two completely separate relays and fuse holders, haven't had an issue since with my fans.
07-09-2015, 01:54 PM
#7
This is how I had mine wired.
Yellow (trigger hot) to 12v+
Red (main power hot) to 12v+
Orange (main power hot) to fans
Black (trigger ground) to PCM trigger wires
If I ever replace the wiring, I'd do it so that the fuse is between the relay and the 12v power supply (i.e. reverse the red and orange wires).
Yellow (trigger hot) to 12v+
Red (main power hot) to 12v+
Orange (main power hot) to fans
Black (trigger ground) to PCM trigger wires
If I ever replace the wiring, I'd do it so that the fuse is between the relay and the 12v power supply (i.e. reverse the red and orange wires).
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07-09-2015, 05:50 PM
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Sooooo...for the people retarded with wiring, what do I need to swap around to fix this? Sorry, I literally know next to nothing about wiring
Maybe... 
07-09-2015, 10:20 PM
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I was still inside the car on a lift when my buddies down below said it was fixed, so I didn't know yet what they did. Maybe don't put rolled eyes on your post?
To answer your question, we really didn't do anything besides replace the blown fuses. The next time the fans came on they didn't blow them, and they worked as they should. However I took the car up the road right after that, turned it off, and when I turned it back on one of the fans kicked on and then blew the fuse. I think it's just the startup amperage is blowing the fuse, and once they get going they run at under 30 amps. I'm going to get a couple of 40 amp fuses to throw in there to see if they still blow. If they do, I know I have a short somewhere or something, but if they don't I'm going to go under the assumption that the startup spike is what is blowing the fuses currently.
To answer your question, we really didn't do anything besides replace the blown fuses. The next time the fans came on they didn't blow them, and they worked as they should. However I took the car up the road right after that, turned it off, and when I turned it back on one of the fans kicked on and then blew the fuse. I think it's just the startup amperage is blowing the fuse, and once they get going they run at under 30 amps. I'm going to get a couple of 40 amp fuses to throw in there to see if they still blow. If they do, I know I have a short somewhere or something, but if they don't I'm going to go under the assumption that the startup spike is what is blowing the fuses currently.
07-09-2015, 10:50 PM
#13
I was still inside the car on a lift when my buddies down below said it was fixed, so I didn't know yet what they did. Maybe don't put rolled eyes on your post?
To answer your question, we really didn't do anything besides replace the blown fuses. The next time the fans came on they didn't blow them, and they worked as they should. However I took the car up the road right after that, turned it off, and when I turned it back on one of the fans kicked on and then blew the fuse. I think it's just the startup amperage is blowing the fuse, and once they get going they run at under 30 amps. I'm going to get a couple of 40 amp fuses to throw in there to see if they still blow. If they do, I know I have a short somewhere or something, but if they don't I'm going to go under the assumption that the startup spike is what is blowing the fuses currently.
To answer your question, we really didn't do anything besides replace the blown fuses. The next time the fans came on they didn't blow them, and they worked as they should. However I took the car up the road right after that, turned it off, and when I turned it back on one of the fans kicked on and then blew the fuse. I think it's just the startup amperage is blowing the fuse, and once they get going they run at under 30 amps. I'm going to get a couple of 40 amp fuses to throw in there to see if they still blow. If they do, I know I have a short somewhere or something, but if they don't I'm going to go under the assumption that the startup spike is what is blowing the fuses currently.
Buddy had his boost a pump wired to his jump post and it stopped working, low and behold we look at the fuse and it was melted. I'm wondering if that is what is causing people grief with some of this stuff. I'm no wiring expert so it is a shot in the dark though.
07-10-2015, 10:55 AM
#17
Here's what I did and it seems to be working good. The fuses that come in the Derale kit are super cheap and the metal is really thin so I upgraded mine to some high quality 40 amp ones before I had an issue based on what I've been reading. This is how I wired it too:
Fan power supply from the positive jump post.
Grounds on the core support on drivers side where there are already factory grounds.
Used the positive and negative wires from the factory fans to activate the Derale relay. Both fans operate independently of each other as they did from the factory and so far so good!
Fan power supply from the positive jump post.
Grounds on the core support on drivers side where there are already factory grounds.
Used the positive and negative wires from the factory fans to activate the Derale relay. Both fans operate independently of each other as they did from the factory and so far so good!
07-10-2015, 11:58 AM
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Here's what I did and it seems to be working good. The fuses that come in the Derale kit are super cheap and the metal is really thin so I upgraded mine to some high quality 40 amp ones before I had an issue based on what I've been reading. This is how I wired it too:
Fan power supply from the positive jump post.
Grounds on the core support on drivers side where there are already factory grounds.
Used the positive and negative wires from the factory fans to activate the Derale relay. Both fans operate independently of each other as they did from the factory and so far so good!
Fan power supply from the positive jump post.
Grounds on the core support on drivers side where there are already factory grounds.
Used the positive and negative wires from the factory fans to activate the Derale relay. Both fans operate independently of each other as they did from the factory and so far so good!
