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Runtz 12 Volt to 6 Volt Reducers

Specs
Overall Height:
.67
Overall Width:
.55
Overall Length:
1.70
Amperage:
4
Notes
Use with gauges, not heater fans or radios.
Runtz 12 Volt to 6 Volt Reducers

Click image to enlarge

Details

Reviews (20)

Q & A (9)

What's in the Box

Info

"Runtz" transistorized 12v to 6v reducers allow you to use your original 6 volt electronic devices (like gauges) on a vehicle that has been converted to 12 volts. You will need a "Runtz" for each 6 volt electric gauge on your car.

Designed for 12 volt negative ground systems only. Screw type terminals. 1.5 ohm resistance, 4 amp max load, 25 watts.

910-64101 Instructions (PDF)

Note: Never, ever use ceramic block style reducers for gauges, radios or lighting. A power surge will destroy the electronics when first turned on. Ceramic block reducers should only be used to operate 6 volt DC motors and fans on 12 volt DC.

Customer Reviews

Rated 4.5 out of 5 by 20 reviewers.
RATING BREAKDOWN
20 reviews
5 Stars
14
4 Stars
4
3 Stars
1
2 Stars
0
1 Star
1
RECOMMEND THIS PRODUCT:

Thrownrod
Verified Purchaser
Shawnee, OK

As Advertised

November 14, 2016
Simple and direct. Follow the instructions.
Pros:
  • Easy Install
Yes, I recommend this product.
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Lance
Verified Purchaser
sd

Great product

November 08, 2016
I have heard about these for a long time and finally got a chance to try them myself and they are great
Yes, I recommend this product.
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Bob
Verified Purchaser
Michigan

Runtz volt reducer only worked for about a week

August 08, 2016
I received product from Speedway in a couple days after ordering, the voltage reducer installed easily. The problem I am having is that the Runtz voltage reducer failed after a few days of intermittent use. I installed the Runtz through the battery not the starter as directed. Note: Before installation, I did contact the Runtz company for help and they were very helpful reminding me not to wire Runtz through the starter because of possible elect. spikes.
Pros:
  • Easy Install
Cons:
  • Sensitive To Elec Spike
No, I would not recommend this product.
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Cap'n Babs
Verified Purchaser
Verified Reviewer
Dayton, Ohio

Best Out There!

August 03, 2016
Simple to install, works like a charm.
Yes, I recommend this product.
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Heritage
Verified Purchaser
Ponchatoula, LA

Worked

May 10, 2016
Was the solution to a malfunctioning fuel gauge. Worked like a charm
Pros:
  • Clear Instructions
Yes, I recommend this product.
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Don
Verified Purchaser
Verified Reviewer
Alabama

12 to 6 volt runt converter

May 10, 2016
I used this converter to change my fuel guage on a 52 chevy to 6 volts. It worked great and therefore l could keep a little bit of nostalgia in my car
Pros:
  • Excellent Product
  • Does A Great Job
  • Super Fast Shipping
Yes, I recommend this product.
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Gpete
Verified Purchaser
Verified Reviewer
Laurie, Missouri

Runtz review raves.

March 01, 2016
Used this product as explained in the 12 volt conversion guide book, to use on my gas and heat gauge on my 55 Studebaker. Directions could have been a little better perhaps, but I figured it out after reading them a couple times. Very simple, just insert in power line before power goes into gauge. Hook original hot line onto screw stud and put other end of runtz onto stud leading in to gauge.
Yes, I recommend this product.
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Chris
Verified Purchaser
Verified Reviewer
Falcon Colorado

Runt review

November 17, 2015
Great item used it on a customer's 1949 chevy sedan for the fuel gauge. It works great.
Pros:
  • Easy To Install
  • Compact
  • Small compact
Yes, I recommend this product.
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KXA
Verified Purchaser
Verified Reviewer
Greeneville, Tn.

'47 Ford Sedan

October 22, 2015
Converted a 6 volt system to 12 volts. Was using original guages and needed to reduce voltage. This product was simple to install, no guess work. Ordered extra for next build.
Yes, I recommend this product.
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Billy Joe
Verified Purchaser
Cotati, Ca

Runtz 12V to 6V reducers

October 07, 2015
We use them alot in our industry. Thanks for a great product!!
Pros:
  • Use Then All The Time
Yes, I recommend this product.
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Page 1 of 2

Product Q&A

9 questions : 11 answers

1 answers

When using this for gauges should I include an inline fuse with what amp? I installed one of these and it worked great but I think I accidentally shorted in out. I am ordering another one and was thinking I should add an inline fuse. It says 4 amps so should I use a 4 amp fuse or smaller? Or no inline fuse at all?

ATHS
July 27, 2014

When using this for gauges should I include an inline fuse with what amp? I installed one of these and it worked great but I think I accidentally shorted in out. I am ordering another one and was thinking I should add an inline fuse. It says 4 amps so should I use a 4 amp fuse or smaller? Or no inline fuse at all?

Answers

July 29, 2014
Travisp
Normally the Runtz reducers do not need to be fused but do require a good ground as mentioned in the instructions. If for some reason you did not receive instructions you can look up the part number on our website and scroll down on the main page to the Instruction pdf in purple print.
1 answers

Will the reducer work for a 6v radio as well as the 6v horn [you recommended in a previous answer]?

Patric
April 04, 2013

Will the reducer work for a 6v radio as well as the 6v horn [you recommended in a previous answer]?

Answers

April 04, 2013
Jason
The “Runtz” device part #91064101 is only for VERY small electrical loads. A horn and radio will draw way too much amperage for this device. We offer the electronic voltage reducer (910-64103) that would work well for a 6 volt horn and radio operating on a 12 volt system.
1 answers

Will this product work on a 12V solar panel to reduce to 6volts?

July 21, 2011

Will this product work on a 12V solar panel to reduce to 6volts?

Answers

July 25, 2011
Zach
These are designed for 12 volt negative ground systems only. Screw type terminals. 1.5 ohm resistance, 4 amp max load, 25 watts. I would imagine that solar panel draws more than 4 amps, so I would advise against using this unless you know that it draws less than 4 amps.
1 answers

will this reducer work for a 6volt tube radio in a 49 ford converted to 12v negative ground

bob
pratt and miller restorations
May 26, 2011

will this reducer work for a 6volt tube radio in a 49 ford converted to 12v negative ground

Answers

June 02, 2011
John
Our Runtz voltage reducer is designed solely for voltage drop for 6 volt gauges. In larger current draw applications such as the old tube radios you will need to purchase 91064103 to handle the increase in amperage draw.
2 answers

can i use this reducer for a 6v horn?

Huntington Beach, CA.
April 25, 2011

can i use this reducer for a 6v horn?

Answers

July 03, 2015
Eric
Expert
Sorry, no. The Runtz is designed for dash gauges and electrical loads up to .75 amps. As a side note most 6 volt horns will work fine on 12 volts, they will just be louder than original. Thanks Randy (inventor of the Runtz)
November 28, 2011
fifthave
Sorry, no. The Runtz is designed for dash gauges and electrical loads up to .75 amps. As a side note most 6 volt horns will work fine on 12 volts, they will just be louder than original. Thanks Randy (inventor of the Runtz)
2 answers

Will one Volt reducer work for all guages,or do i need one for each guage.Also will this work for the fuel guage ?

March 09, 2012

Will one Volt reducer work for all guages,or do i need one for each guage.Also will this work for the fuel guage ?

Answers

November 16, 2012
HUSSEY
You need one for each gauge that uses a 6V signal. I did a conversion on a 52 Chevy Styline. The only guage that needed one was the fuel gague. All other gauges were mechanical.
March 12, 2012
Eric
One voltage reducer will operate one gauge. If you have 4 gauges you will need 4 of these "Runtz" voltage reducers.
1 answers

On a positive ground system, do you reverse the wiring and hook the gauge up in reverse. in other words hook the positive to the opposite terminal and the output to the sending unit?

Chuck
ct
July 01, 2015

On a positive ground system, do you reverse the wiring and hook the gauge up in reverse. in other words hook the positive to the opposite terminal and the output to the sending unit?

Answers

July 01, 2015
Eric
Expert
These are for negative ground systems only and cannot be used with a positive ground system.
1 answers

Would I need one of these reducers for my speedometer? Its cable driven, but what about the speedo gauge light?

maddawg
hesperia, ca
November 21, 2015

Would I need one of these reducers for my speedometer? Its cable driven, but what about the speedo gauge light?

Answers

November 23, 2015
Eric
Expert
If you are converting your vehicle to 12 volt then we suggest changing the bulbs in the gauges to 12 volt bulbs.
1 answers

Will this product (# 91064101 ) work well on my 6 volt clock .

None
Fort Bragg , ca.
December 12, 2015

Will this product (# 91064101 ) work well on my 6 volt clock .

Answers

December 14, 2015
Eric
Expert
Yes this voltage reduce will work fine with a 6 volt clock.
Page 1 of 1

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