F-Body Cooling Fan 3-Relay Question
10-23-2013, 05:26 PM
#1
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
F-Body Cooling Fan 3-Relay Question I've searched and read threads about cooling fan relays till I'm blue in the face.
Based on my findings, my understanding is that the 2002 f-body dual fan set-up used three relays and had both fans running at low speed for the low temp signal and both fans running at high speed for the high temp signal.
I found the wiring diagram that many say they used to wire three relays up in this fashion.
My question is:
Does anyone offer a pre-wired 3-relay harness that matches this fan functionality as I just described?
Thanks.
Based on my findings, my understanding is that the 2002 f-body dual fan set-up used three relays and had both fans running at low speed for the low temp signal and both fans running at high speed for the high temp signal.
I found the wiring diagram that many say they used to wire three relays up in this fashion.
My question is:
Does anyone offer a pre-wired 3-relay harness that matches this fan functionality as I just described?
Thanks.
10-23-2013, 07:48 PM
#3
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
I do not have AC however I do want the fans to operate as noted in the original post. I'm comfortable wiring although I have never worked with relays. I'm not sure what type I need in order to achieve the functionality that I want. I've also heard that I need special relays that will protect the ECM from voltage spikes...is that correct?
10-23-2013, 10:02 PM
#4
A relay is just an electro-magnet. Very simple.
Buy what most consider a "bosch" 5 terminal relay and pigtail. Terminals 30, 85, 86, 87 and 87a. IIRC you NEED the 87a terminal on the relay, some do not have it.
30 = source of power (usually) OR ground
85 and 86 are power and ground. You can use either for a trigger.
87a = the output of terminal 30 when the relay is NOT triggered.
87 = the output of terminal 30 when the relay IS triggered.
Buy what most consider a "bosch" 5 terminal relay and pigtail. Terminals 30, 85, 86, 87 and 87a. IIRC you NEED the 87a terminal on the relay, some do not have it.
30 = source of power (usually) OR ground
85 and 86 are power and ground. You can use either for a trigger.
87a = the output of terminal 30 when the relay is NOT triggered.
87 = the output of terminal 30 when the relay IS triggered.
10-24-2013, 12:34 AM
#6
Its not hard to make a harness for the Relay and Fans.. just get the relays, pigtails, some wire and connectors.. If you have a source to buy the parts or you can go to the Junk Yards and just rip out a setup or parts.
I used some spare relays and pigtails from the Camaro that I parted out.. Work just like OEM. You can even use a JY fuse box w/relays.
BC
I used some spare relays and pigtails from the Camaro that I parted out.. Work just like OEM. You can even use a JY fuse box w/relays.
BC
10-24-2013, 06:20 AM
#7
I've searched and read threads about cooling fan relays till I'm blue in the face.
Based on my findings, my understanding is that the 2002 f-body dual fan set-up used three relays and had both fans running at low speed for the low temp signal and both fans running at high speed for the high temp signal.
I found the wiring diagram that many say they used to wire three relays up in this fashion.
My question is:
Does anyone offer a pre-wired 3-relay harness that matches this fan functionality as I just described?
Thanks.
Based on my findings, my understanding is that the 2002 f-body dual fan set-up used three relays and had both fans running at low speed for the low temp signal and both fans running at high speed for the high temp signal.
I found the wiring diagram that many say they used to wire three relays up in this fashion.
My question is:
Does anyone offer a pre-wired 3-relay harness that matches this fan functionality as I just described?
Thanks.
http://www.racetronix.biz/itemdesc.a...%2D006&eq=&Tp=
T,
Trending Topics
10-24-2013, 09:49 AM
#8
Teching In
Thread Starter
Join Date: Apr 2013
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Exactly what I was looking for.
Thanks.
I appreciate the input from everybody else as well.
10-24-2013, 11:24 AM
#9
12 Second Club
iTrader: (8)
Join Date: Apr 2006
Location: Ocala, FL
Posts: 188
Likes: 0
Received 0 Likes
on
0 Posts
Here is a 3 relay setup I found on Ebay. I was thinking about ordering since its only $69.00. Looks like a nice set up.
http://www.ebay.com/itm/151134100961...84.m1423.l2661
http://www.ebay.com/itm/151134100961...84.m1423.l2661
10-24-2013, 12:56 PM
#10
Here is a 3 relay setup I found on Ebay. I was thinking about ordering since its only $69.00. Looks like a nice set up.
http://www.ebay.com/itm/151134100961...84.m1423.l2661
http://www.ebay.com/itm/151134100961...84.m1423.l2661
10-24-2013, 01:50 PM
#12
12 Second Club
iTrader: (8)
Join Date: Apr 2006
Location: Ocala, FL
Posts: 188
Likes: 0
Received 0 Likes
on
0 Posts
He just replied, its Automotive Cross Link GXL, 12ga. and PCM signal is 20ga.
Is 12 gauge heavy enough?
10-25-2013, 01:28 PM
#16
HP fans (i.e. SPAL) require 10G wire b/c they draw much current. 12G is OK for factory fans but there is still a considerable performance hit. Our harness is 100% weatherproof and easier to hide. If you want max fan performance and best possible reliability our FNWH-006 is the way to go. We offer a lifetime warranty on this harness.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
10-25-2013, 01:51 PM
#17
12 Second Club
iTrader: (8)
Join Date: Apr 2006
Location: Ocala, FL
Posts: 188
Likes: 0
Received 0 Likes
on
0 Posts
HP fans (i.e. SPAL) require 10G wire b/c they draw much current. 12G is OK for factory fans but there is still a considerable performance hit. Our harness is 100% weatherproof and easier to hide. If you want max fan performance and best possible reliability our FNWH-006 is the way to go. We offer a lifetime warranty on this harness.
You offering any specials for LS1 Tech members?
This definitely looks like the best harness option I have seen.
10-25-2013, 02:28 PM
#18
http://racetronix.biz/itemdesc.asp?ic=FNWH-006&eq=&Tp=
Free t-shirt using coupon code FREE-SHIRT on orders over $100.00 (less SH)
http://racetronix.biz/items.asp?Cc=PROMO&Bc=
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<