After finding out that the Mark VIII fan was too much for the SPAL V3 to handle, I decided to scrap the whole controller idea and make up my own harness/diagrams for a hopefully trouble free system. I designed it so that it operates much like an electric fan in newer cars. It also has a high speed manual override switch, as well as feedback through a single RGB LED for the various states (high/low/AC).
Mark VIII fan installed:
Wiring schematic & diagram:
http://www.motortopia.com/files/cars/al ... bnail1.jpg
http://www.motortopia.com/files/cars/al ... bnail1.jpg
Relays/custom harness wired up and ready to go:
(figured I may as well make use of the Maxi-fuse holder from a painless 70A wiring kit I decided not to use)
Headlight/fan relays mounted on bracket at battery tray:
I scratched my head finding a good place for the manual override switch and in my absolute refusal to poke holes in any factory panels, I came up with this:
...I'm going to mount the LED on the lower side of the switch, facing the driver. Unfortunately I couldn't find an LED bezel like I used for my alarm LED, so I'll have to figure out something there (may just glue the LED in place).
I just have to wire up things under the dash for the RGB LED and manual override switch and it should be good to go - I'll follow up with pics tomorrow if I get a chance.
Mark VIII fan installed:
![100_2370jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13ee0f3655%2F100_2370jpg_Thumbnail1.jpg&hash=284dfc29ba6d0449b838817dea43f1d9)
![100_2371jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13eecb5f6b%2F100_2371jpg_Thumbnail1.jpg&hash=3c2816ba9756a36c787c9cf942dc5873)
![100_2372jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13efa12bb6%2F100_2372jpg_Thumbnail1.jpg&hash=59d1bb88ec60ad3eae2cda5ec0679e07)
Wiring schematic & diagram:
http://www.motortopia.com/files/cars/al ... bnail1.jpg
![FAN_SCHEMATICjpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13fa262ca5%2FFAN_SCHEMATICjpg_Thumbnail1.jpg&hash=d275ef1205a131440cecb3064550daab)
http://www.motortopia.com/files/cars/al ... bnail1.jpg
![FAN_DIAGRAM_1jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f8ff3a8a%2FFAN_DIAGRAM_1jpg_Thumbnail1.jpg&hash=d147eb58f35970cf4aeb91225a44f46f)
Relays/custom harness wired up and ready to go:
![100_2411jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f1204065%2F100_2411jpg_Thumbnail1.jpg&hash=5f938a58c1bcbb4f3741215ede437148)
![100_2412jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f2300bf4%2F100_2412jpg_Thumbnail1.jpg&hash=f8d1efb7365c1051d7614a181db62cbf)
(figured I may as well make use of the Maxi-fuse holder from a painless 70A wiring kit I decided not to use)
Headlight/fan relays mounted on bracket at battery tray:
![100_2413jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f3dc3c87%2F100_2413jpg_Thumbnail1.jpg&hash=400a9213fd8ae0862b642172606a859d)
![100_2414jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f54d7e24%2F100_2414jpg_Thumbnail1.jpg&hash=1c4e47395045e504d5b5a7f4521b762e)
I scratched my head finding a good place for the manual override switch and in my absolute refusal to poke holes in any factory panels, I came up with this:
![100_2416jpg_Thumbnail1.jpg](https://cdn-0.gbodyforum.com/proxy.php?image=http%3A%2F%2Fwww.motortopia.com%2Ffiles%2Fcars%2Falbum_mark_viii_electric_fan%2F49e13f67e84fe%2F100_2416jpg_Thumbnail1.jpg&hash=65ab35fdc19e38e5753e68b285af634d)
...I'm going to mount the LED on the lower side of the switch, facing the driver. Unfortunately I couldn't find an LED bezel like I used for my alarm LED, so I'll have to figure out something there (may just glue the LED in place).
I just have to wire up things under the dash for the RGB LED and manual override switch and it should be good to go - I'll follow up with pics tomorrow if I get a chance.