35A Single Fan Relay Kit – Carbureted with Basic Trigger


This kit is for vehicles with carburetors with or without air conditioning.  This completely waterproof kit installs easily and plugs directly into your electric fans via a standard fan plug – of which most of the major fan manufacturers use.  Harnesses dressed in Split Braided Tubing for that show car look!

Triggering is fully automatic (see specifications below for specifics).  Powers fans requiring up to 35A continuously with minimal voltage drop!

Includes full color step-by-step instructions and all hardware shown.

Full specifications outlined below.



Wiring to Battery: 10 AWG TXL, terminated with a 5/16″ eyelet
Wiring to Fans: 10 AWG TXL pair, terminated with an OEM style fan plug
Maximum Current Capability: 35A
Typical Voltage Drop through wiring when driving a single 16″ fan requiring 25A continuous with 13.8 VDC of input:

  • Immediately after power up: 350mV or 2.5%
  • After 1 hour of continuous operation: 390mV or 2.8%
  • After 4 hours of continuous operation:  400mV or 2.9%

Triggering is as follows:

  • Fully automatic via thermostatic switch
  • Fully automatic via air conditioning (fan comes on when A/C compressor is running)

Thermostatic Switch Specifics:

  • 185 degF ON / 175degF OFF
  • Threads are 3/8″ NPT
  • Includes 1/2″ NPT adapter

Dimensions of Relay Module with mounting bracket installed:  2 15/32″ x 1 5/8″ x 3 17/32″ (62mm x 42mm x 90mm)

Harness Lengths:

  • Power Harness to Battery:  3ft
  • Output Harness to Fan:  3ft
  • Thermostatic Switch Harness:  4ft
  • A/C Harness:  5ft
  • Switched Power Harness:  6ft


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