<div dir="ltr">Concerning grounding. I added a ground panel to the front wall with multiple ground connection lugs years ago. Each of the instruments has a separate ground from the body to the ground lug panel, so none of them are dependent on the retaining clips . BTW, I included a point on that panel to easily attach the ground pin on the volt meter. <div>The instruments work, but the head, turn, and tail lights are not consistently working now.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 23, 2020 at 7:34 AM Jim Adney <<a href="mailto:jadney@vwtype3.org">jadney@vwtype3.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Jeff, I think it's unlikely that replacing your harness would fix your problems. <br>
Many of the ills that are blamed on "old copper" just don't make sense, and <br>
even your experience with the nasty residue is not all going to be cured with <br>
a new harness.<br>
<br>
Fire damage is a separate issue. You may be able to replace individual <br>
wires, but that is often quite difficult. Otherwise, Dennis's suggestion is the <br>
best one: Find a better, genuine VW harness from a donor '67, because the <br>
aftermarket harnesses tend to be correct for just a few years, while VW <br>
made changes almost every year, and sometimes more than once in a year. <br>
(There were three different versions in '71!) Things were simpler in the early <br>
years before FI, so that might make your search easier.<br>
<br>
Part of your problem may be due to bad grounds. That is certainly the case <br>
with the gauge lights. VW started adding ground wires to everything in '69, <br>
which fixed a lot of those problems, but in '67 the instrument lights all <br>
depend on the retaining clips for their grounds. As time has shrunk the vinyl <br>
dashpad, those clips no longer get pressed as tightly against the backside of <br>
the metal dash, making the grounds undependable.<br>
<br>
You might also check the retaining springs on each gauge. The mounting <br>
arms for them often get bent. The 2 arms should be parallel. When mounted <br>
in the dash, the springs should NOT go outside the little bumps in the metal <br>
dash. You can feel these bumps if you take one of the gauges out.<br>
<br>
Finally, at least starting in '68, there is a ground lug on the brace under the <br>
glove box that a lot of things used, but this depended on a number of <br>
daisy-chained wires, that connected a lot of things together. I don't know if <br>
this was there in '67, but if it was, then it's important for that ground chain to <br>
be unbroken.<br>
<br>
On 22 Mar 2020 at 20:55, Jeff C wrote:<br>
<br>
> Many years ago the wiring under my dash started to burn, so I put it<br>
> out using a dry chemical fire extinguisher. Thar stuff is nasty and<br>
> corrodes bare metal. Over time I have been trying to clean connectors<br>
> and such at every opportunity. The turn signals sometimes work,<br>
> sometimes don't. I installed the rebuilt speedometer a couple of weeks<br>
> ago (Thanks Jim) and afterwards, some lights work, some don't. I tested<br>
> the connections at the fuse block and I could get some lights to work<br>
> by removing and re-connecting the wire ends, but not all. This leads me<br>
> to believe that the residual corrosive dry chemical powder is still<br>
> having an affect on the connections. So, I have been fighting the<br>
> wiring for a long time and consistently losing. I was going to go for a<br>
> ride a couple of days ago, but wasn't sure that the lights were<br>
> properly working. Is it time for a full harness replacement? They are<br>
> available, expensive, but I just can't depend on all of the electrics<br>
> to stay working. I replaced a couple of harnesses on my old non-VW<br>
> truck and it has made it consistently reliable. For those who have<br>
> replaced one, please share your experiences. Jeff '67 Squareback <br>
<br>
<br>
-- <br>
*******************************<br>
Jim Adney, <a href="mailto:jadney@vwtype3.org" target="_blank">jadney@vwtype3.org</a><br>
Madison, Wisconsin, USA<br>
*******************************<br>
<br>
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