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1970 Barracuda

Ziggey

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Hello all ,working on my dash ,it’s out of the car ,came across a voltage regulator it’s on the back side of cluster near high beam indicator,I don’t see what wires go to it one terminal has a condenser looking thing mounted,I do have a short black wire from harness that would reach on of the other terminals ,but the one to the right I have no clue ?Any ideas it’s easy now just trying to sort out wiring before I install dash thanks

72BEF428-5650-427D-9E38-BC3135EEEF6A.jpeg


364B85E3-B697-46B8-8501-CFE8383037E8.jpeg
 

EW1BH27

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That's the jumper that feeds the 5volts from the limiter to the 3 gauges. A standard dash has only 2 connectors coming off/from the voltage limiter. Is this what you were referring to as "mechanism".

5vLimiter O.E.M..JPG
 

MoparCarGuy

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You may want to consider changing out the factory Instrument Voltage Limiter a.k.a. Instrument Voltage Regulator (IVR) with a solid-state regulator.
The original IVR is a bi-metallic strip style regulator and it is horrible at regulating the 5 volts DC.
Solid-state IVRs are available as part number IVR3 from RTE for E-Bodies. Real Time Engineering

There are many other reasons to upgrade it. This Mopar Collector's Guide article has good info, too.

RTE's website has this information on the E-Body IVR:
"The E-body limiter has a mounting tab spot welded to the back of the limiter. A small 1/4" head bolt is used to fasten this type of limiter to the metal dash frame, and this is how this type gets its ground. The +12V input terminal on this limiter is a dual male spade terminal. It has two terminals so that one can be +12V input, and the other is intended to be connected to the capacitor (sometimes called a condenser). The capacitor does not have any effect on the operation of the limiter, but is intended to stop AM radio interference. The 2nd terminal on this type of limiter is a female spade terminal, and this is the 5V DC limiter output to the gauges. This type of limiter was used on just a few different types of cars, including the 70-74 E-bodies."

INSTALLATION OF IVR (same as factory IVR a.k.a. limiter):
"Connect the condenser to one of the two male spade terminals. The main under dash harness plugs into the other male spade terminal, supplying 12VDC to the limiter. The small wiring harness that powers the fuel/oil/temperature gauges should be plugged into the single female spade terminal."

Good luck and let us know how everything turns out.​

RT Engineering Instrument Voltage Regulator IVR.jpg
 
Last edited:

Cuda Hunter

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@Ziggey

Just curious if your questions were answered.

Love to see that 70 barracuda you have. Perhaps go over to the welcome section and introduce yourself and your awesome car!
 

Rons340

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You may want to consider changing out the factory Instrument Voltage Limiter a.k.a. Instrument Voltage Regulator (IVR) with a solid-state regulator.
The original IVR is a bi-metallic strip style regulator and it is horrible at regulating the 5 volts DC.
Solid-state IVRs are available as part number IVR3 from RTE for E-Bodies. Real Time Engineering

There are many other reasons to upgrade it. This Mopar Collector's Guide article has good info, too.

RTE's website has this information on the E-Body IVR:
"The E-body limiter has a mounting tab spot welded to the back of the limiter. A small 1/4" head bolt is used to fasten this type of limiter to the metal dash frame, and this is how this type gets its ground. The +12V input terminal on this limiter is a dual male spade terminal. It has two terminals so that one can be +12V input, and the other is intended to be connected to the capacitor (sometimes called a condenser). The capacitor does not have any effect on the operation of the limiter, but is intended to stop AM radio interference. The 2nd terminal on this type of limiter is a female spade terminal, and this is the 5V DC limiter output to the gauges. This type of limiter was used on just a few different types of cars, including the 70-74 E-bodies."

INSTALLATION OF IVR (same as factory IVR a.k.a. limiter):
"Connect the condenser to one of the two male spade terminals. The main under dash harness plugs into the other male spade terminal, supplying 12VDC to the limiter. The small wiring harness that powers the fuel/oil/temperature gauges should be plugged into the single female spade terminal."

Good luck and let us know how everything turns out.​

View attachment 89410
This is an outstanding product that I was not aware of being available. Absolutely worth the money! I noticed that they also have a modern circuit board upgrade for the tachometer. I am going to order one of each for my current build and give them a try. I believe it to be well worth the effort.

Thanks for the share!
 
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