[Richard]

Thanks for the diagram will be doing this in the near future. Looks like it just puts the fans in series to slow them down. Curious if the low speed control turns off when high speed comes on. I am guessing it does not due the use of three relays. Personally I would not recommend a setup that only has just one fan on in most dual fan configurations. If there is any sort of shroud and only one fan is running a good amount of airflow will be pulled through the fan that is off instead of through the radiator. Just recirculating the air under the hood. Each fan coming on a different temp may be okay if fans are tight to the rad. But then you are not using the full cooling capacity of the radiator. JMHO