 Oil cooler fan relay, Fan wont run |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| simonr |
 Aug 8 2012, 08:08 AM
Post
#1
|
|
Member  Group: Members Posts: 65 Joined: 11-July 10 From: Indianapolis Indiana Member No.: 11,925 Region Association: None  |
Good Day, Does anyone have a wireing diagram for the relay on an oil cooler fan? My fan runs when I wire it direct. I have a 30 amp relay and I dont think I have it wired right. The oil cooler is the derale with the fan . I bypassed the thermostat on the cooler to work on it . Any help would be appreciated THanks
|
   |
 
|
| Mike Bellis |
Aug 8 2012, 08:10 AM
Post
#2
|
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
|
|
|
|
|
| Dave_Darling |
Aug 8 2012, 09:07 AM
Post
#3
|
|
914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
The download fails for me, right at the end?
A relay is a spring-loaded switch plus an electromagnet. If you're lucky, there will be a diagram showing the switch and coil of the magnet on the body of the relay itself. The switch is spring-loaded so that it normally rests connected to one of the two "output" terminals. (87a on a Bosch relay.) When current flows through the coil of the electromagnet, it pulls the switch to connect to the other output terminal--87 on a Bosch relay. The fixed end of the switch is terminal 30 on a Bosch relay, so you basically choose if #30 is connected to #87a or to #87. For current to flow through the electromagnet, one of the terminals connected to the coil has to be hooked to power, and the other to ground. Those are 85 and 86 on a Bosch relay. It usually doesn't matter which gets power and which gets ground. So, wiring diagram type thing: Battery to #30. #87 to the fan. #85 to switched power. #86 to ground, or to the thermostat that which gets grounded when the temp is high enough. Using switched power for #85 means that the fan will not continue to run after you turn the car off. --DD |
|
|
|
| Mike Bellis |
Aug 8 2012, 09:32 AM
Post
#4
|
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None
|
|
|
|
|
| Jeffs9146 |
Aug 8 2012, 12:54 PM
Post
#5
|
|
Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
QUOTE(kg6dxn @ Aug 8 2012, 08:32 AM)  (IMG:style_emoticons/default/piratenanner.gif) That's a great guide!! Thanks for posting it!! |
|
|
|
| Mike Bellis |
Aug 8 2012, 12:58 PM
Post
#6
|
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None
|
QUOTE(Jeffs9146 @ Aug 8 2012, 11:54 AM) QUOTE(kg6dxn @ Aug 8 2012, 08:32 AM) (IMG:style_emoticons/default/piratenanner.gif) That's a great guide!! Thanks for posting it!! Right! (IMG:style_emoticons/default/first.gif) It's the relay theory that is important. What you choose to operate with a relay is your choice. |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 03:34 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.