[T3] On that 73 T-3 horn

Jim Adney jadney at vwtype3.org
Sun Nov 12 19:50:33 PST 2017

On 12 Nov 2017 at 16:23, William J wrote:

>  I can see the contact wiper has a small hole worn in it about 1/16" diameter
>  right where is rides on the ring. 

This is how they wear, and then they fail catistrafically. The 
contact ring on the wheel wears until it develops a loose spinter 
which catches in that hole, typically when you're in the middle of a 
turn. At that point, you have a choice: straighten up the wheel in 
spite of the ripping metal sounds coming from in there, or crash.

I've been planning to start fixing these, but I wouldn't use brass, 
as what you can get is too soft and will just gall up and wear again 
quickly. I would go with spring steel or stainless. Not sure which 
would make the better choice, but something dissimilar to brass would 
be best.

And get some lubrication in there.

>  I also pulled the headland switch out and 4 way . The headlamp switch was loose
>  where it fastens to the dash and the 4 way I wanted to check the connections
>  and found the metal housing was loose so I recrimped it.

Yes, these get loose, and the pot metal body doesn't take recrimping 
very well. I recommend finding some narrow nylon cable ties to 
tighten around them to keep them from coming apart.

You'll need a special wrench to retighten the retaining rings, that 
hold those switches. There's a good deal on these on amazon.com, 
serviced by airhead parts, but cheaper than at airhead.com.

> It also was a differnt part number than the 72 spare I have and has a
> 300 ohm resistor from contact 54 to a solder spot titled R which is not
> a male spade. 

The resistor started in '73. It's there so the bulb in the flasher 
knob will glow slightly in the dark.

Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA

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