[Mgs] 1980 MGB wiring question

[PaulHunt73]

Clausager and BL documents imply that the UK only had twin horns from 1970, North America with the Mk2.  Originally there was a sub-harness from the right-hand to the left-hand horn, the main harness probably contained the wiring for both from 1970.  It/they moved from the slam panel to the inner wing in 1963.

The earth path to the horn push is pretty awful, no allowance for electrical conductivity in the chassis/crossmember/rack/UJ/column assembly unlike a pal's TR4 that has a braided strap from the chassis to the rack and another round the UJ.  In which case a PO may have removed the 2nd horn as it would double the load and make things even worse if connections are weak.  My V8 came to me with a single moped horn, I had to add a relay before the correct horns would work at all even one.  Subsequently I had to add one to the roadster as well.  The standard horns with good electrical conductivity are pretty powerful.

If you put a voltmeter between the purple terminal at the horns and the body and push the button you will see how much voltage you are losing through the fuse (if any) by the voltage dropping from 12v.  Do the same on the purple/black and the higher that is above zero shows how much you are losing through the earth path.

PaulH.

----- Original Message ----- 


  Speaking of horns, my 1969 MGB GT has only one horn.  Is that original?  It has two wires going to it.  It works OK, but it just sounds weak.  What is a good alternative?  Can I wire two horns here?
  Mike MacLean

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