Replacement Light Bulb # 1157

Optronics Accessories and Parts - A1157B

Replacement Bulb by Optronics, Inc.

A1157B Replacement bulb part #1157

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• What are the Correct Replacement Bulbs for Optronics Trailer Lights # ST6RB and # ST7RB
  
• It looks like you have Optronics Lights # ST6RB and # ST7RB. For either of these lights, the correct replacement bulb will be # A1157B that you have referenced and # 30-90-194 for the side light. Trailer lights are a 2-wire system. This means that they have combined stop and turn signals on the same bulb. If the lights do not blink with the turn signals, you may need to change the running light wire with the stop/turn signal wires. Use a circuit tester like # 3808 to test the trailer wires to
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• Comparing Optronics Replacement Trailer Light Bulbs 1157 and 2057
  
• The Optronics replacement bulb, # A1157B, and the Optronics bulb # A2057B are dual filament bulbs. The double-filament design works for combination brake, tail and turn lights. A 2057 can replace an 1157 bulb.
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