Volage Regulator Question

[hubtones]

Hi all,

 

I have a question regarding a small box that is tied to the voltage regulator in my '72 tii. This box is connected to the voltage reg via a short harness with a 3-prong connector. The 3-prong connector from the main harness to the alternator plugs into the smaller box. I'm wondering its function and if it can be eliminated.

 

Any ideas? Pic included below...

 

Thanks,

Jeff

[TobyB]

...hmmm- that doesn't look familiar in the VR circuit.

 

It DOES look like a relay.  How many connections?

 

If it has only 2, I'd suspect it of being a cap (for noise reduction) or resistor (for nefarious purposes)

 

t

 

[hubtones]

It has three prongs just like a the voltage regulator. There is a short harness (~3") with another three prong connector that actually plugs into the VR. There are no other inputs/outputs.

[Son of Marty]

Never seen that set up either but as Toby says noise reduction for the radio would be my first guess, I would think it was added in parallel at some point and you could bypass it but be aware that is only a guess and not based on any actual knowledge other than I have never seen a vr in 2 stages on any car I can remember  

[Son of Marty]

5 hours ago, Son of Marty said:

Never seen that set up either but as Toby says noise reduction for the radio would be my first guess, I would think it was added in series at some point and you could bypass it but be aware that is only a guess and not based on any actual knowledge other than I have never seen a vr in 2 stages on any car I can remember  

One other thought are the 3 prongs the same on the box as on the vr.

Edited February 2, 2017 by Son of Marty

[TobyB]

Can you get a better look at the wiring?  I've never seen the wires extended by the factory- see if you can figure

out if the 'added' jumper was crimped into the factory regulator plug...

 

t

 

[hubtones]

Sure I will get some better pics and post them. It may very will be some sort of noise suppressor in line. It looks absolutely factory with no crimping and even a net around the short harness.

 

@Son of Marty - The prong are identical to the VR.

 

Thanks all.

[Mike Self]

I've seen US relays with that same three prong socket...does your car have A/C?  The A/C relay on my Frigiking unit looks very much like that, but it's mounted on the exhaust side of the engine.  Just a guess.  I've not seen that kind of setup before either...

 

mike

[donkbike]

It's a noise suppressor, they were used on 70s and early 80s 911s, never saw one on a 2002 but I guess there's no reason you can't add one.

[hubtones]

@Mike - No AC in this car. And none installed prior as far as I can tell.

 

@donbike - Thanks. I tend to agree with you and the others. I'm going to remove it. No radio in the car either.

[Mark92131]

Doesn't the yellow tape on the voltage regulator indicate that it has internal noise suppression for the radio.  Belt and suspenders?

 

Mark92131

['76mintgrün'02]

I had not heard of this Mark, but a search implies that there may have been a regulator with white tape, which was suppressed.

 

[Simeon]

Are there any terminal numbers marked on the bottom? If German DIN standard you can look up the functions. 

[2002]

The small box looks like a VR - perhaps it is there since the yellow taped box doesn't work.

[hubtones]

Yellow tape is non-suppressed from what I read in the restortation guide. I will pull it off and check for terminal numbers on the bottom. It's hooked to the the VR box.