SAE J253-1989 HEADLAMP SWITCH

Foreword-This Reaffirmed Document has been changed only to reflect the new SAE Technical Standards Board Format.

1. Scope— This document defines the test conditions, procedures, and performance specifications for 6-,12-, and 24-V manually actuated headlamp switches(circuit breaker(s) may be incorporated for circuit overload protection).

2. References-There are no referenced publications specified herein.

3. Definitions
3.1 Headlamp Switch -An operator-activated device intended primarily to control functioning of headlamps, parking lamps, tail lamps, and certain marking lamps. Secondarily, the device may control functioning of various accessory and instrument lights.

4. Test Requirements
4.1 Test Equipment and Instrumentation
4.1.1 POWER SUPPLY-The power supply shall comply with the following specifications:
a. Output Current-capable of supplying the continuous and in-rush currents of the design load
(Reference:4.2.1.1).
b. Regulation Dynamic-the output voltage at the supply shall not deviate more than 1.0 V from zero to maximum load(including in-rush current) and should recover 63% of its maximum excursion within 100 ms.
Static-the output voltage at the supply shall not deviate more than 2% with changes in static load from zero to maximum(not including in-rush current), and means shall be provided to compensate for static input line voltage variations.
c. Ripple Voltage-maximum 300 mV peak-to-peak.

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