12V to 6V - Automotive Wiring and Electrical


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12V to 6V

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Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

vwadad
New User

Feb 7, 2013, 11:11 PM

Post #1 of 3 (1706 views)

12V to 6V	Sign In

Hello Forum Members,

I have an old Jeep that originally had a 6 volt electrical system. That vehicle was converted at some point to a 12 volt system. I am installing an original 6 volt fuel gage, and therefore need to drop the voltage in the fuel gage circuit (prior to the gage) to 6 volts. In order to do this I am using an NTE962 IC voltage regulator. The wiring seems simple enough, but I am having problems. With no load, Vin of 12V and the center terminal of the regulator grounded as required, there is indeed 6 volts as measured between the Vo terminal and ground. But with any load applied to Vo, the voltage immediately drops to about 1 volt. This happens when the fuel gage is connected (approx .5A), or when a small 6V bulb is the load. The NTE962 is attached to a piece of aluminum as a heat sink, so I don't think temperature is a problem.

Any suggestions?

Thanks, Brian

re-tired
Veteran / Moderator
re-tired profile image

Feb 8, 2013, 6:13 PM

Post #2 of 3 (1644 views)

Re: 12V to 6V	Sign In

perhaps this unity would work better ,its made to handle the loads of all the gauges.

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12 volt - 6 volt Oil, Gas, Temp Vintage Gauge Reducer

LIFE'S SHORT GO FISH

Lemonpie
User

Feb 9, 2013, 1:54 PM

Post #3 of 3 (1621 views)

Re: 12V to 6V	Sign In

I'm curious if you are running a 12 v starter or a 6 v starter. When I was growing up on the farm, tinkering, many years ago, it was common practice to replace the generator and battery with 12 volt parts and keep the 6v starter. For example the Farmall "M" was notoriously slow cranking, but with the original starter (6v) and 12 volt electrics, it really spun over. It started easily that way, and I don't recall going through starters. Those tractors were made in the early to mid 50s.
Lemonpie

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