i have a customers 84 300cd. the blower shuts off after 10-15 minutes or sooner depending on how it feels that day. i have monitered power supply & ground circuts at blower then blower controller.nothing ever quit it would just loose power to motor. i checked wiring and found the speed enable circut would loose 12v or go to ground when it quits.i dont know what would tell the controlle to shut it down ? the clutch stay on after blower shut down until it gets to cold. can you help.iatn techs have tried ...thanks gary

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