Quote:
Originally Posted by Richard Leslie Phillips
- it is the earthing bit I cannot work out at present - a daisy chain to all the instruments.
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The exact sequence in which the earths are connected to the instruments doesn't matter so long as the connections are sound.
As you can see, on my car some of the instrument securing brackets have been used as common earth "posts" where several earth wires come together held in place by a knurled nut. These present a good opportunity for poor connections and on my car the knurled nuts were not very tight, however they all check out okay with an ohm meter. The black earth wire goes into the loom by the ammeter.
In the photos, the oil pressure gauge appears to not be earthed, but it is, the black wire is attached to a tag which is folded down one side of the gauge so it's not obvious in the photo. Of course the pressure gauge is mechanical so the earth is only required for instrument lighting.
One thing to be aware of when looking at my photos is that the wiring colours are correct up to the bullet connectors, but in some cases the wires from the connectors to the instruments are the wrong colours. It's difficult to tell if they were once correct, but the wiring all appears to be the same vintage.
The 40 year old bullet connectors aren't the best!
What specific problems are you having? (what's not working?)
By the way, my 411 is a series 5, but I would be surprised is any of this was different to the S3.
31-07-11, 01:47 AM
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