If you are installing a 1965 or 1966 Mustang GT reproduction fog light switch, you will need to know where to drill the hole in your dash.  Ultimately, you will make two measurements and will drill the hole above the cross section of these two measurements.  Use these steps when measuring and drilling:

HOW TO MEASURE AND DRILL FOR A 1965 OR 1966 MUSTANG GT FOGLIGHT SWITCH

1. Using a pencil, draw a vertical line 1 1/8" over from the door post (this will be at the lower, left hand corner of the dash).
2. Using a straight edge, hold the straight edge at the center of the hole in the door jam where the interior light button switch is located.  Draw a horizontal line across the vertical line drawn, making a cross section.
3. Drill your hole 1/4" above these two crossed lines.

These measurements were taken from a 1965 Mustang Fastback factory GT and will work for a Mustang Coupe, but a Mustang Convertible with a power top may differ slightly.


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