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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

Q & A

What's in the Box

"Runtz" transistorized 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 4.3 out of 5 by 9 reviewers.
RATING BREAKDOWN
9 reviews
5 Stars
6
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
1
RECOMMEND THIS PRODUCT:

kstr
Verified Purchaser
Lou.ky

6v to 12v problem solver

May 26, 2015
Suggest you consider "real small item" packaging. Your smallest box is pretty big.
Yes, I recommend this product.
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speedoo51
Verified Purchaser
Rocky Hill, CT 06067, USA

Works as intended..

March 23, 2015
Grounding wire comes out of seal right in the way of mounting screw and when assembling has to be bent out of the way; this should not be the responsibility of the end user but should be incorporated into the product...
Yes, I recommend this product.
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Willyq
Verified Purchaser

Only lasted 4 days

August 05, 2014
I purchased two of these. I installed one on my fuel gauge and the other on my clock in my 1953 Pontiac. The one on the fuel gauge worked great for three days, the clock lasted four days. Both were installed as per instructions and on there own fused lines with 3 amp fuses. fuses did not blow. As I need a fuel gauge, I am going to try again. The cost of converting the fuel gauge to 12 volt is about $150.00-$200.00. I'm hoping it was just a bad batch. will let you know.
Pros:
  • Simple to Install
Cons:
  • didn't last very long
No, I would not recommend this product.
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Merchant Response:

Speedway Motors Customer Service team has issued this customer warranty replacements for the defective units received. We apologize for any inconvenience this may have caused and are happy to help in any way.
HUSSEY
KC

A must have in 6v to 12v conversion.

November 11, 2012
I used in on my fuel gauge when converting my 52 Chevy Styling from 6v to 12v. Super easy to install, gauge works as it should.
Yes, I recommend this product.
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HUSSEY
KC

A must have in 6v to 12v conversion.

November 11, 2012
I used in on my fuel gauge when converting my 52 Chevy Styling from 6v to 12v. Super easy to install, gauge works as it should.
Yes, I recommend this product.
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Paw kev
Verified Purchaser
thibodaux la

Big bang for the buck

April 22, 2012
Converted my 48 gmc gauges back to 6 volt.
Pros:
  • Easy To Install
  • Provides Accurate Readings
Yes, I recommend this product.
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tom
Verified Purchaser
Denver colorado

I would buy this again

December 29, 2011
Easy to install just be carefull when tighting down.Not to over tighten
Pros:
  • Easy To Install
  • Provides Accurate Readings
Yes, I recommend this product.
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Flips Trucks
Verified Purchaser
San Luis Obispo, CA

Great product [...]

August 11, 2011
Great installation instructions.
Pros:
  • Easy To Install
  • Compact Design
Yes, I recommend this product.
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The Monster
Oregon

careful installing!

November 03, 2010
Be careful installing this reducer. The ground wire runs very close to the mounting hole. When you run the nut down onto the reducer when securing it to the gauge, make sure the ground wire doesnt get pinched between the reducer and the nut. Mine did and it split the wire insulation just enough that it shorted and ruined my reducer. Results were no gas gauge and no turn signals. (turn signals attach at the back of my gas gauge). Also, put some duct tape or something to the back side of the reducer to cover the head of the bolt. My reducer was a hair away from my dash cluster when installed and I could imagine it flexing when going over rough terrain and shorting to the dash cluster. Or maybe put the duct tape on the dash cluster itself. Thats it! Other than that it works well, after ordering my second one! haha
Pros:
  • Simple to understand
  • Easy To Install
  • Great instructions
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

7 questions : 9 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.
Page 1 of 1

You may also be interested in:

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. 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)

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

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