Lots of us have done this swap. Not hard to do. The speedo wires would
be for the cruise control so just ignore them. The 14 pin connector can
be opened on one side and then the wires moved to match the positions of
the 90 harness. The 2 brown wires on separate pins in the 83 harness
should be connected together and put to the same pin as the 90. If you
connect a wire from the coil to the 14 pin connector for a tach the oil
pressure alarm in the 90 speedo will go off at times. There are a couple
ways to deal with this but no time to go into it now. Not a big deal.

Mark

John Runberg wrote:

>looked at the instrument cluster on my 90 as a possible replacement on my 83, but the wiring doesn't match. No bigggie, but thought I'd ask for list advice before tracking the wiring through the bently. Specifically, the 90 has a blue/white & brown wire connecting to the speedo and the main plug has different pin-outs.
>
>Anyone done this swap? List archives have not helped so far.
>
>john
>
>
>