6 volt relay

I use this one for my car:

02750001_00_grande.jpg


Bought from Radio Shack for $7.00 here: https://cdn.shopify.com/s/files/1/0953/5270/products/02750001_00_grande.jpeg?v=1446834758

Although it says 14 volt, it works fine with my 6 volt.

BTW, I don't use a relay on my fog lights, just the ignition switch and everything that runs through there. I run the fog lights off of the headlight circuit breaker through a vintage NOS Ark-les switch under the dash (here: http://www.ebay.com/sch/i.html?_odk...H2.Xarkless.TRS0&_nkw=ark-les+switch&_sacat=0) and yellow LED indicator light to remind me when they're on. Been using them like that as day time driving lights for thousands of road trip miles and no problems.

Fog%20Light%20Switch_zps9cl8f2iw.jpg
 
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Sorry to disagree with Henry, but that is not a good relay to use for 6v systems.


Bosch SPDT ​
6V 30 amp Relay​
0332204001​
Used as dimmer relay In 1950 to 1966 VW​
Also listed as:​
Merced 0035340245​
Porsche PCG61510100​
John Deere AR91168​
​
​

The Bosch Relay is a high quality metal cased relay,​
but it is fairly expensive, a cheaper​
alternative is the plastic style such as:​
Durakool DG85B-8011-96-1006-M1​
TE Connectivity / Potter & Brumfield 1432873-1​
 
JSeery said:
Sorry to disagree with Henry, but that is not a good relay to use for 6v systems.
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Funny. I coulda sworn I've run my whole car off of that relay for three years and 50,000 miles as part of my emergency kill system. :confused: Here: http://www.fordbarn.com/forum/showthread.php?t=88677

One advantage of the relay from Radio Shack is it is higher capacity - 60 amps vs 30 amps for the others, if that matters at all. Certainly not needed for a couple of fog lamps. In fact, no relay needed at all, as I said.
 
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Thank you for all the help. My car had a relay in it but it went bad. There were no numbers on it. Since I do not want to reinvent the wheel on the car I I'll get the relay. I do like the idea of the adding an led light.

Jacob
 
It's not that you can't use an incorrect part and get away with it sometimes, it's just not the best approach. 12v relays are made for 12v systems and 6v relays are made for 6v systems. Will a 12v relay work in a 6v system? Sometimes, but it does not have the correct latching voltage and is always on the borderline of not latching properly. It can also vary from relay to relay within the same brand. Same thing goes for using a horn relay for a different application. Horn relays are designed for intermittent use where a fog light relay would be considered a constant latched application. It is possible to get by with using all sorts of parts for the wrong application, but not sure what the point of that is. It may work ,it may not work or it may marginally work, just doesn't seem like the best way to do things when the correct parts are available.

I worked in the design of aircraft systems and I'm sure a lot of folks will appreciate that we ALWAYS used the correct specification parts in the aircraft and not something that might work most or some of the time!!!
 
Also, probably not an issue but something to be aware of is some relays use a diode internally which can create a problem with reverse polarity on the early Fords. Attached is a diagram for headlights, but would work for fog lights with some modification.
 

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We use six volt starter solenoids to run headlights, particularly halogens. It takes two, one for high beam, the other low. Old car headlights suffer from voltage loss in the dash switch, the dimmer switch, bullet connectors, etc.so there is little juice left for the lamps. You feed direct battery to the solenoids, and operate them using the original wiring. They are placed on the inside left fender on a small panel. If interested, I can post photos.
 
supereal said:
We use six volt starter solenoids to run headlights, particularly halogens. It takes two, one for high beam, the other low. Old car headlights suffer from voltage loss in the dash switch, the dimmer switch, bullet connectors, etc.so there is little juice left for the lamps. You feed direct battery to the solenoids, and operate them using the original wiring. They are placed on the inside left fender on a small panel. If interested, I can post photos.
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I didn't bring that approach up, but I agree with supereal and in fact that is what I use on my 33 coupe. I always though it was an original idea that I thought up, but after I saw a photo/sketch of the one supereal uses I decided I must of seen it before and had the idea in the back of my mind (ie. stole it!) LOL. The only difference is I use constant current relays and supereal uses starter (intermittent) relays. But he has used them for years (like Henry and his 12v relays), with good success, so go figure.

I mainly like the period look vs the modern square cube especially the black plastic ones. But that is just a personel thing.
 

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well I found the the boch relay. I got 3 for $32. That should get the fog lights running. I would like to get my headlights brighter. But i read that running a relay on the early ford head lights that are run from the steering column switch is not a good idea. ( I am working on a 36 Ford) What are the thoughts. superreal i would like to see the photos. Thank you
 
Why in the world would running a relay for headlights be a problem? Some people don't think they are needed, but that is a different issue, they certainly will not cause a problem. I can post a diagram of the hookup if your interested.

Note: Superreal's set up looks just like the one I use (I think I must have stolen the idea from him!).
 
I can not find the old post but I think it had something todo with hurting the switch at the bottom of the colum I would like to see the diagram
Thank you
 
supereal said:
We use six volt starter solenoids to run headlights, particularly halogens. It takes two, one for high beam, the other low. Old car headlights suffer from voltage loss in the dash switch, the dimmer switch, bullet connectors, etc.so there is little juice left for the lamps. You feed direct battery to the solenoids, and operate them using the original wiring. They are placed on the inside left fender on a small panel. If interested, I can post photos.
Click to expand...

I used this method on my 46 and what a difference it made.
 
jacob smith said:
I can not find the old post but I think it had something todo with hurting the switch at the bottom of the colum I would like to see the diagram
Thank you
Click to expand...

With a relay setup you are reducing the current through the light switch from full headlight draw to the small current required to latch the relay. That is the whole idea is to remove the current flow in the stock lighting switch. The attached diagram is for a floor dimmer switch, but the earlier wiring would be the same just using the high and low beam wire out of the lighting switch.
 

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