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Old 08-02-2003, 08:05 PM   #1
WRX 555 STi
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Default Dual fans for Link+ users...

For those of you who haven't noticed, the Link only controls your driver side fan. Today I connected both fans to run on the same wires. Here's what you do:

1. There is a wiring loom where the plug for the driver side fan comes out of. You need to cut the protective plastic covering and expose the wires.

2. Cut the plug about 2" off that loom. You will end up with the plug in your hand with two wires about 2" long.

3. Cut the plug of the pass. side fan following above steps. Make sure to leave enough wire to splice and connect.

4. Take some 16 or 14 gauge wire, and attach the pass. side fan plug at one end. Solder and use electric tape on exposed wire.

5. Now, at the other end of the wire you just installed the pass. side fan plug, splice the end about 2" (exposing 2" of wire).

6. Attach the driver side plug wires to the top 1" of the other and of the wire with the pass. side plug. Solder and use electrical tape on exposed wires.

7. Now you should have a wire (actually 2, one for ground, one for trigger) that has both fan plug at each end, and 1" of exposed wires on the driver side plug.

8. Now splice the wires that come up from the wiring loom (under the radiator). Attach both wires, solder and tape them. Make sure you have used the same color wire for ground and trigger. If not, your fans will not work.

Here's a rough drawing of all of the above.


This is just as a reference if someone wants to do the mod. It would be searchable too.

~Anthony.
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Old 08-02-2003, 08:18 PM   #2
Chav
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The second fan is supposed to be on when the A/C is on. The problem is the low power drives of the link plus are only designed to run one relay. So hooking up two relays to one drive may damage the driver. The best thing to do is to put a relay to switch on both of the fan's or the aux fan and a/c. Remember the relays are given a ground to switch on.

-Chav
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Old 08-02-2003, 08:37 PM   #3
WRX 555 STi
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Hmmmm, it's one relay. One relay runs both fans.

~Anthony.
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Old 08-02-2003, 11:24 PM   #4
Chav
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oops i see, nice work

-Chav
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Old 08-22-2004, 11:51 PM   #5
White 2.5rs
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i wanted to bump this to ask another q about it
couldnt i just connect both fans to the output on the link for fan one?

alex
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Old 08-23-2004, 12:38 AM   #6
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Quote:
Originally Posted by White 2.5rs
i wanted to bump this to ask another q about it
couldnt i just connect both fans to the output on the link for fan one?

alex
you would want the fans relayed, so Id stick to the setup shown above
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Old 08-23-2004, 01:11 AM   #7
White 2.5rs
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theyre relayed they have to be
that 18 gauge wire isnt big enough to carry the current for those fans and i beleive there are fan relays in the fuse box under the hood
so couldnt i just connect the 2 left and right fan wires at the ecu harness together to minimize a hack job like the one above

alex
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Old 08-23-2004, 02:14 AM   #8
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Quote:
Originally Posted by White 2.5rs
theyre relayed they have to be
that 18 gauge wire isnt big enough to carry the current for those fans and i beleive there are fan relays in the fuse box under the hood
so couldnt i just connect the 2 left and right fan wires at the ecu harness together to minimize a hack job like the one above

alex
right, if you did that you would be cutting out the relay
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Old 08-23-2004, 02:30 AM   #9
White 2.5rs
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how
there are 2 relays correct ? im not bein smart im just askin stuff
the pinout for the stock ecu said fan one & fan two , the link install said install fan one onto fan output on link
if i combined both wires, since the ecu isnt a relay, wouldnt i then have both relays turn on at once?
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Old 08-23-2004, 02:58 AM   #10
PHATsuby
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just try it and see

Ben
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Old 08-23-2004, 11:49 AM   #11
ForesterPerformance
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I did something like this... only easier...

On two of the Link+ RS-Ts down here, i just ran a jumper wire in the underhood fusebox from the relays. Now when the one fan comes on, both come on. There was no hacking necessary on the wire harness. The relay-on power is low amp so it is no big deal.
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Old 08-23-2004, 01:11 PM   #12
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Quote:
Originally Posted by ForesterPerformance
I did something like this... only easier...

On two of the Link+ RS-Ts down here, i just ran a jumper wire in the underhood fusebox from the relays. Now when the one fan comes on, both come on. There was no hacking necessary on the wire harness. The relay-on power is low amp so it is no big deal.
there's an even easier way, jump it at the PNP ECU harness
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Old 08-23-2004, 01:11 PM   #13
sideways slut
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Quote:
Originally Posted by White 2.5rs
how
there are 2 relays correct ? im not bein smart im just askin stuff
the pinout for the stock ecu said fan one & fan two , the link install said install fan one onto fan output on link
if i combined both wires, since the ecu isnt a relay, wouldnt i then have both relays turn on at once?

this is what i did about a month ago, no problems yet.
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Old 08-23-2004, 02:12 PM   #14
White 2.5rs
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alright cool ill give it a shot
thanks sideways/jeremy
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Old 08-23-2004, 07:29 PM   #15
White 2.5rs
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hmm
i wonder y the purge control and radiator fan wires are the same......
maybe when the ac is on it opens the purge control solenoid which....doesnt make sense to me unless to get a little bit more power.?
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Old 08-24-2004, 02:31 PM   #16
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Quote:
Originally Posted by White 2.5rs
hmm
i wonder y the purge control and radiator fan wires are the same......
maybe when the ac is on it opens the purge control solenoid which....doesnt make sense to me unless to get a little bit more power.?
it's something about the way they wired the Link+, it's not teh Purge COntrol solenoid
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Old 08-24-2004, 03:14 PM   #17
White 2.5rs
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i mean i was looking at the pinout diagram for my subaru, not for the link
i just dont get it i possibly think that the power is just to supply the relay and the - is the other side of the coil that is supplied
anyone know
alex
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Old 08-24-2004, 03:40 PM   #18
HndaTch627
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Quote:
Originally Posted by White 2.5rs
i mean i was looking at the pinout diagram for my subaru, not for the link
i just dont get it i possibly think that the power is just to supply the relay and the - is the other side of the coil that is supplied
anyone know
alex
that's a typo in the service manual IIRC
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Old 08-24-2004, 04:59 PM   #19
White 2.5rs
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well ***...
what is the proper wire for solenoid power and radiator control?
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