> Exactly! Strictly speaking you should swing the compass twice,
> once lights
> on and again lights off and make two deviation cards.
Well, strictly speaking it's an impossible problem. On a TR2-early TR6, the
charging current from the generator also runs through the dash area, so the
magnetic field will depend on how hard the generator is working.
Not to mention turn signals and more importantly, brake lights. Even the
courtesy light (on later cars) will have an effect.
Randall
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