Wiring a transcooler fan??
Thread Starter
Joined: Oct 2003
Posts: 1,313
Likes: 10
From: Las Vegas NV
Wiring a transcooler fan?? Any one here can explain me more in detail how to do this wiring ?
Just installed a transmission cooler with a electric fan and i want it to activate with the factory fans.What wire from the factory fan i need to use to get signal? How is the correct way to install a relay in this case?
Any pictures going to be appreciated. Thanks for the help.
Just installed a transmission cooler with a electric fan and i want it to activate with the factory fans.What wire from the factory fan i need to use to get signal? How is the correct way to install a relay in this case?
Any pictures going to be appreciated. Thanks for the help.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Looking at this stock diagram there is two ways to do it.....
http://photobucket.com/gallery/user/...OTU2NA==/?ref=
If you wanna tie it into the stock wiring, under the hood there are 3 relays, see the feed lt blue 409, thats the trigger side for low speed an should should provide 12v+ during low speed operation. It then follows the purple path into the second motor to complete the circuit. That light blue will go to your fan + then ground the other side. High speed operation still gives 12 volts but the rest of the path is altered and it travels to ground through the second relay, but that won effect your fan operation.
Option 2 if you want to run a separate circuit, buy some 12-14 gauge wire and a small fuse holder. Load it with a 20-30 amp fuse, and use your same lt blue wire to light off your own relay on the 85 terminal, 86 to ground, 87 to your fused wire you rant to the battery, 30 to your fan +, then ground the other side of the fan to the chassis.
http://dlids.org/bosch-12v-relay-wiring-diagram.html
http://photobucket.com/gallery/user/...OTU2NA==/?ref=
If you wanna tie it into the stock wiring, under the hood there are 3 relays, see the feed lt blue 409, thats the trigger side for low speed an should should provide 12v+ during low speed operation. It then follows the purple path into the second motor to complete the circuit. That light blue will go to your fan + then ground the other side. High speed operation still gives 12 volts but the rest of the path is altered and it travels to ground through the second relay, but that won effect your fan operation.
Option 2 if you want to run a separate circuit, buy some 12-14 gauge wire and a small fuse holder. Load it with a 20-30 amp fuse, and use your same lt blue wire to light off your own relay on the 85 terminal, 86 to ground, 87 to your fused wire you rant to the battery, 30 to your fan +, then ground the other side of the fan to the chassis.
http://dlids.org/bosch-12v-relay-wiring-diagram.html
Thread Starter
Joined: Oct 2003
Posts: 1,313
Likes: 10
From: Las Vegas NV
[QUOTE=01ssreda4;19664867]Looking at this stock diagram there is two ways to do it.....
http://photobucket.com/gallery/user/...OTU2NA==/?ref=
If you wanna tie it into the stock wiring, under the hood there are 3 relays, see the feed lt blue 409, that's the trigger side for low speed an should should provide 12v+ during low speed operation. It then follows the purple path into the second motor to complete the circuit. That light blue will go to your fan + then ground the other side. High speed operation still gives 12 volts but the rest of the path is altered and it travels to ground through the second relay, but that won effect your fan operation.
In the first option what you are saying is that i can connect the 2 wires from the electric fan straight to power in the original harness of the car and the other to ground and the factory relays going to make the function of a extra relay?
In other word i not need to install a extra relay?
By the way thanks so much for the help. I follow many you thread here , I'm some kind of follow your steps with my car.
http://photobucket.com/gallery/user/...OTU2NA==/?ref=
If you wanna tie it into the stock wiring, under the hood there are 3 relays, see the feed lt blue 409, that's the trigger side for low speed an should should provide 12v+ during low speed operation. It then follows the purple path into the second motor to complete the circuit. That light blue will go to your fan + then ground the other side. High speed operation still gives 12 volts but the rest of the path is altered and it travels to ground through the second relay, but that won effect your fan operation.
In the first option what you are saying is that i can connect the 2 wires from the electric fan straight to power in the original harness of the car and the other to ground and the factory relays going to make the function of a extra relay?
In other word i not need to install a extra relay?
By the way thanks so much for the help. I follow many you thread here , I'm some kind of follow your steps with my car.
