One Relay or Two

Sorry for the blurry diagram. It was an internet picture. There are actually 2 fan motors. I connected my power probe and grounded both motors and powered up either the low speed or the hi speed wire and both fans come on. Originally the PCM controls whether they operate in low speed mode or high speed mode. The heavy wire that's hot at all times has a 40 amp fuse for protection and the hot in start or run wire is protected by a 20 amp fuse. I figured I could use a 40 amp circuit breaker and a 20 amp fuse as the factory did to have the same circuit protection. Funny thing is, the fan assembly is exactly the same width as my radiator once I cut off the factory mounting tabs. Thanks for the comments, suggestions fellas.