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Rewiring the radiator fans?

 
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Old 10-14-2010, 07:07 PM
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Rewiring the radiator fans?

I have no idea what I'm doing when it comes to this. After taking my radiator out I noticed the wires to the fan were cut. I'd like to just rewire both completely but as I've said I have no idea what I'm doing. Can anyone explain or point me in the direction of something that explains doing this please? Thanks in advance.
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Old 10-14-2010, 07:20 PM
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Re: Rewiring the radiator fans?

run the fan to a relay.

on the relay, you will see the terminals are labeled:

86 gets ignition power
30 gets a FUSED battery power
85 is the ground
87 will be the power to the fan

the other wire on the fan will go to ground.

Doing it this way, the fans will always be on when the ignition is on.

alternatively, you could also run the "87" wires to a switch inside the cabin so if you just want the ignition on without the fans being on, you can turn them off.


The other way, if the wires were simply cut and you have both sides is to just join the wires back together.
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Old 10-14-2010, 07:27 PM
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Re: Rewiring the radiator fans?

I was just going to go with the joining the sides but for some reason I know I won't be happy with that and have to do the whole thing. And thank you for the response I appreciate it.
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Old 10-15-2010, 02:28 PM
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Re: Rewiring the radiator fans?

why dont you just hook it up the way its supposed to be? the fan relay is in the fuse box behind the passenger strut tower. it receives a signal from the ecu to automatically turn the fans on when needed. if you can, locate the wires that used to go to the fan and note the color and size of the wires. one of these should be ground and the other should be positive. remove the fuse box, open it (the bottom half) and look inside for the wires below the fan relay, you should see one of the wires you found in the harness. thats your positive wire. now if you have a multimeter and set it to ohms (the horse shoe looking thing) if your meter isnt auto ranging set it to 20 or 200 ohms connect one probe to the wire under the fuse box and the other to the cut end. the closer to 0ohms the better. if you get 0 or close to it the wire is perfectly good and theres no need to rewire the system just solder or use butt connectors to reconnect the wires and you'll be good to go.
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Old 10-17-2010, 12:23 AM
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Re: Rewiring the radiator fans?

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Originally Posted by Nfrank89 View Post
why dont you just hook it up the way its supposed to be? the fan relay is in the fuse box behind the passenger strut tower. it receives a signal from the ecu to automatically turn the fans on when needed. if you can, locate the wires that used to go to the fan and note the color and size of the wires. one of these should be ground and the other should be positive. remove the fuse box, open it (the bottom half) and look inside for the wires below the fan relay, you should see one of the wires you found in the harness. thats your positive wire. now if you have a multimeter and set it to ohms (the horse shoe looking thing) if your meter isnt auto ranging set it to 20 or 200 ohms connect one probe to the wire under the fuse box and the other to the cut end. the closer to 0ohms the better. if you get 0 or close to it the wire is perfectly good and theres no need to rewire the system just solder or use butt connectors to reconnect the wires and you'll be good to go.
The only reason I said about rewiring the whole thing is the person who owned this before me I'm guessing had no idea what they were doing when it came to this car. Everything else that I've done has been completely Fu*ked up. Next time I start doing something I'll have to take before and after pics to show how Fu*ked up everything is. I just figured if I rewired everything that'd be one less thing ill have a problem with down the line. Plus I'm too ocd to not do everything perfectly and exactly how its suppose to be.
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