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-   3rd Generation Specific (1993-2002) (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/)
-   -   Fan Relay Question (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fan-relay-question-1160940/)

ecurbd02 03-05-23 11:09 AM
Fan Relay Question
 
Quick question. Do these relays (circled) only control the fans? As in, if I’m running aftermarket fans off of my haltech ecu, do I need these? I was going to remove them but I was afraid that they may control something else. Thanks for any help!
https://cimg4.ibsrv.net/gimg/www.rx7...4b86208ed.jpeg

scotty305 03-05-23 11:40 AM
Correct, those four relays send power to the fans and nothing else. Details are on page Z-40 in the factory wiring diagram.

ecurbd02 03-05-23 03:21 PM
Originally Posted by scotty305 (Post 12551530)
Correct, those four relays send power to the fans and nothing else. Details are on page Z-40 in the factory wiring diagram.
awesome, thanks a lot man!

ecurbd02 03-07-23 02:57 PM
Soo I cut the fan relays out and the wires/plugs going to the fans annnd there are more wires going into the relays than the fans and it makes me nervous that I cut something I still need lol

DaleClark 03-08-23 07:55 AM
Nope. When in doubt look at the wiring diagram.

It's a pretty simple relay circuit. Though if you are using aftermarket fans that's a good source for power and whatnot.

Dale

ecurbd02 03-20-23 05:46 PM
Originally Posted by DaleClark (Post 12551881)
Nope. When in doubt look at the wiring diagram.

It's a pretty simple relay circuit. Though if you are using aftermarket fans that's a good source for power and whatnot.

Dale
So the chase bays radiator set up comes with a fan relay harness with thermoswitch, I would like it to receive power when the ignition is on and shut off when the car is off. Am I right in thinking, utilizing the B/Y colored wire in the diagram would give me what I’m after?
https://cimg2.ibsrv.net/gimg/www.rx7...8a8786028.jpeg

Blk 93 03-20-23 07:42 PM
IIRC, the 4 fan relays have a small harness that connects to the front harness, so cutting wires is probably not required. Same idea as the ignition harness/engine harness.

TwinCharged RX7 03-20-23 10:04 PM
Harness is likely already cut from installing the radiator in that location.

If you are using the B/Y wire, that's ok as long as all it's doing is activating the relay. If you are looking for a factory wire to actually provide the high amps to the relay to then go to the fans, use the L wire.

ecurbd02 03-20-23 10:23 PM
Originally Posted by TwinCharged RX7 (Post 12553424)
Harness is likely already cut from installing the radiator in that location.

If you are using the B/Y wire, that's ok as long as all it's doing is activating the relay. If you are looking for a factory wire to actually provide the high amps to the relay to then go to the fans, use the L wire.
the higher amps is probably the better choice. Will the L wire “turn off” when the ignition is off? From the diagram it looks to be before the ignition.

Pete_89T2 03-24-23 06:10 PM
Originally Posted by ecurbd02 (Post 12553428)
the higher amps is probably the better choice. Will the L wire “turn off” when the ignition is off? From the diagram it looks to be before the ignition.
^The L wire it will be +12V hot at all times, unless the 60A fuse or 120A fuse blows. So your read of the circuit diagram is correct.

MWillzz 04-04-23 02:32 PM
This may be a little off topic....but for the life of me I do not understand the wiring diagram on the connection of the relays to the harness. I see the wires on the relays are colored, do I match these wires to the same color on the harness?


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