Guide-Matic is an accessory on Cadillacs that can automatically switch the headlights from high beam to low beam in response to the lights from approaching cars or from the tail lights of cars approached from behind.

First available in 1954 the system changed over the years it was in use. The first system has a large electronics box under the hood and a photocell mounted on top of the dash.

The second system first available on the 1960 model years cars has a smaller electronics unit under the dash and a smaller photocell on top of the dash.

The third system first available on the 1964 cars has the photocell and electronics all in one unit mounted behind the grill.

Created by admin. Last Modification: Friday 04 of December, 2009 00:48:02 MST by admin.

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