Products to Compare (max of 3)
Compare These Parts
America's Oldest Speed Shop ® 800.979.0122 Lincoln, NE
Help Center
Help Center
Help Center

U.S.Order Line:


(CST) 7am - 10pm

Race and Rod Tech Support

Mon-Fri 8am - 5pm

Canadian Order Line:


International Order Line:

Since 1952

6 Volt Electric Fan Relay

SAME DAY SHIPPING! Order within the next 8 hours 40 minutes and receive same day shipping

Sold in Quantity:
Terminal Type:
Garage Sale:
6 Volt Electric Fan Relay

Click image to enlarge



Q & A

What's in the Box

These relays are a must have when running one of our 6 volt electric fans. 
  • Heavy duty 20 amp relay
  • Will handle the start-up draw of a 6 volt motor
  • 5 terminals
  • Mounting tab

Customer Reviews

Rated 4.8 out of 5 by 4 reviewers.
4 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star

Verified Purchaser
Key Largo, Fl

As Advertised

January 14, 2016
Item sent out on ime. No shipping issues.
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Verified Purchaser
Leavenworth, Ks.

Relay should come with a blueprint ??

June 29, 2015
The Service and delivery was first class.......
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Verified Purchaser
Verified Reviewer
Sharon, Ontario, Canada

Nice Relay

June 16, 2015
Hard to find a 6 Volt Relay or anything 6 Volts.
  • Easy To Use
  • Hard To Find A 6v Relay
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Verified Purchaser
So. Calif.

Great universal 6v relay.

July 14, 2014
Planned on using it for my fan. Didn't need it, so I wired my fog lamps through it. Worked perfectly. Its a Bosch-the real deal.
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Page 1 of 1

Product Q&A

3 questions : 3 answers

1 answers

Will this work with a 6v neg ground system? will this work with + from battery and - (ground) from steering wheel (trigger) for a 6v horn?

September 22, 2014

Will this work with a 6v neg ground system? will this work with + from battery and - (ground) from steering wheel (trigger) for a 6v horn?


September 23, 2014
Yes this will work with a 6 volt negative ground system.
1 answers

Does this relay contain a set of "break" contacts

April 05, 2015

Does this relay contain a set of "break" contacts


April 07, 2015
This relay has a set of contacts normally open. When terminals 85 and 86 get a complete circuit (or bridge thru the coil) it closes the points and handles the current draw of the accessory you are using.
1 answers

How do you wire this relay? Its going to be used for a electric fan with out a switch

Grumpy 1936
July 29, 2015

How do you wire this relay? Its going to be used for a electric fan with out a switch


July 30, 2015
You must use some sort of a switch, weather it be the ignition switch, a toggle switch, or a coolant temperature switch. There are numbered terminals on the bottom of this realy, and they are 30, 85, 86, 87 and 87a. 30 is the Battery power, 85 is chassis ground, 86 is the ignition or switched power, 87 the load (fan) and then 87a is not used on a circcit like this.
Page 1 of 1

You may also be interested in:

Flex-A-Lite 31147 Adjustable Electric Fan Control Kit
(Part #91064014)
                        This kit lets you make any electric fan thermostatically controlled. Just turn a knob to change activating temperature from 170°-240° F. Complete kit includes adjustable temperature control, 2' capillary tube, wire, terminals, and instructions. 

All electric fans and related components are 12 volt only.

910-64014 Instructions (PDF)

Voltage Reducer for Fans & Motors
(Part #91064102)

You can use this voltage reducer to operate 6 volt DC motors and fans on 12 volt DC. Ceramic insulator with embedded coil and screw-type terminals. 1.5 ohm resistance, 4 amp max load, 25 watts. Mounting stem has 7/16"-28 threads.

Not to be used with gauges, radios or other electronic items. We recommend part 910-64101 for gauges.

Item Details

H.D. Voltage reducer 12 to 6
SPAL Thermoswitch Relay and Wiring Harness Kit
(Part #91064028)

This easy to use cooling fan relay kit includes a labeled wiring harness, 40 amp relay, fuse holder and coolant sensor. Available with 185° on/165° off or 195° on/175° off. Works great with the Spal Pulse-Width Fan Controller.

  • Relay wiring kits are a must-have when installing an electric fan
  • Designed to safely integrate with OEM wiring
  • Waterproof 40/50 Amp relay
  • Printed wires (for ease of installation)
  • 3/8" NPT (National Pipe Thread) stainless steel switch
  • Optional switched override capability
910-64028 Instructions (PDF)
Budget 40-Amp Relay Kit
(Part #91064044)

Use this handy 40 amp relay to wire up your 12 volt horn, electric fuel pump, electric fan with sensor, shaved door handles, or whatever! Contains relay, plug, wire, and instructions.

The wiring would be as follows (included in kit instructions):

  • Red Wire #30 Prong = main 12V power source
  • Black Wire #85 Prong = Electric fan sensor OR low (oil) pressure switch OR grounding switch
  • Blue Wire #86 Prong = 12V toggle switch OR ignition switch "ACC" terminal
  • Yellow Wire #87 Prong = to fan or fuel pump + lead
  • White Wire or Center Prong = not normally used 

Fan or Fuel Pump Relay Installation Instructions (PDF)

Electric 12 Volt to 6 Volt Reducer for Motors
(Part #91064103)

This voltage reducer allows the use of an original 6 volt heater blower and switch in a vehicle converted to 12 volts. Safer and much more reliable than the less expensive ceramic type voltage reducers. Compact 1" x 1" x 3" size occupies little space. 12v to 6v reducer works with up to 10 amps of continuous current draw.

Note: This reducer generates a fair amount of heat when in use. It should be mounted to a non-flammable object, preferrably near cool moving air while the vehicle is in operation.

910-64103 Instructions (PDF)

Universal Relay for Fan/Horn
(Part #91064109)

This heavy duty relay takes the heavy-amp load off the switch, thus preventing an overheated circuit and a possible wiring harness fire. Works well with electric fans and horn circuits too. 30 amp relay.

The wiring for the relay is as follows:

  • Short Red Wire (from relay post 87) = power lead to horn or fan
  • Long Red Wire (from relay post 30) = main power supply in
  • Short Black Wire (from relay post 85) = makes ground connection thru a temp sensitive switch or a grounding horn button
  • Long Gray Wire (from relay post 86) = connects to switched 12 volt power (like ignition switch) so horn or fan turns on/off with key

Includes relay, circuit breaker, wire, terminals and instructions.

Universal Fan Relay Installation Instructions (PDF)

American Autowire 510002 70 Amp Relay Kit
(Part #91051000)

This relay kit includes everything you need to power that big electric fan the right way. Includes a 96” 10-gauge load wire, 72” signal and feed wires, 60 amp MAXI fuse, holder, terminals and detailed instruction sheet.

70 AMP Relay Kit Wiring Instructions (PDF)

American Autowire 500511 70 Amp Relay and Plug w/ 12 Inch Pigtail Only
(Part #91050051)

American Autowire 70 Amp Relay and Plug w/ 12 Inch Pigtail Only

6 Volt Electric Radiator Cooling Fan-12 Inch Dia. Push/Pull-10 Blade
(Part #910151-12)
Help your vintage engine keep cool by adding an electric cooling fan to your radiator. Electric fans are far more efficient than mechanical engine driven fans because they free up horsepower and only run when you want them to (when used with a fan controller, not included). Plus, most electric fans can be mounted ahead of the radiator or behind the radiator, with the more efficient location being on the engine side of the radiator.
These powerful electric fans work with 6-volt electrical systems and draw 6 to 10 amps, depending on the size. The fan is supplied as a "puller" to mount behind the radiator, but it can be changed to a "pusher" by reversing the wires, flipping the fan blade and mounting in front of the radiator.
  • Available in 12", 14" or 16" diameters
  • Fans have 10 straight blades
  • High impact plastic construction
  • Sealed ball bearings for long life
  • Can push or pull
  • Works with positive or negative ground systems
  • Includes mounting ears (straps not included)

Instructions (PDF)

For best results, be sure that your generator supplies enough current to power the fan. If it does not, check out our 6 Volt Alternator 91067169. It supplies additional current at idle to run electric accessories, unlike many factory generators. To learn more about the importance of using a fan shroud along with your cooling fan, read our tech article Radiator Cooling Performance.

*Relay and fan control sold seperately.