Do you mean you want to change the intensity of the lights or just want them to come on with the park lights.
For the 84 to come on with the park lights you will have to find the green wire in the drivers kick panel and tie it to a wire on your guages lights the other ground check with a test tight first to make sure. and if you want it to dim you will have to find the wire on the dimmer that changes voltage as you turn the knob.
