The early relay wiring goes like this.
You want the white wire from the dimmer switch, which can be found just
above the fuse box in a smaller loom.
The other wire is a yellow with a black tracer which can be found in the
same place.
Using flat bladed male and female connector's splice into these two
wires.
Other than connecting the grounds and the power wires this is all there
is to this operation.

RC