Is the Running Lamp or Brake/Turn Signal Filament in 1157 Bulb Supposed to Be Brighter
Products Featured in This Question
Question:
Hello Guys, Wondering which filament on the 1157 bulb is running light and which one is the brake/signal filament. My running light seems real bright. Might I just have the two wires coming from my Peterson tail light reversed? Thanks for your time!!
asked by: Ken N
Expert Reply:
As far as what position they occupy in the bulb, I couldn't say. Dual filament bulbs like the # DI79VR have two different filaments. One filament is of a different resistance value, and thus makes a brighter light. but the brake and turn signal filament would be the brighter of the two.
From what you describe, it certainly sounds as if you have the brake/turn signal and running lamp wire reversed.

Product Page this Question was Asked From
Peterson Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens - Passenger Side
- Trailer Lights
- Tail Lights
- Stop
- Tail
- Turn
- Round
- Surface Mount
- Non-Submersible Lights
- Incandescent Light
- 3-3/4 Inch Diameter
- Red
- Peterson
more information >
Continue Researching
- Search Results: trailer shackles
- Video: Detailed Breakdown of the Shackle Strap
- Shop: Shackle Strap - 3-1/8" Long
- Q&A: Which Filament in Optronics Bulb # A1157B is Used for the Turn Signal
- Shop: Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs
- Shop: Trailer Hitch
- Search Results: trailer suspension parts
- Shop: MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 2-1/4" Long Shackle Straps
- Shop: Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links
- Shop: MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 3-1/8" Long Shackle Straps
- Shop: U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts
- Shop: CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc
- Q&A: Is There a Hub Conversion Kit for Mobile Home Trailer Axles
- Q&A: How to Wire the Red Identification Light Bar with White LED Utility Light OPT88FR?
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Timbren Axle-Less Replacement System for Outdoors RV Back Country Series 28DBS
- Q&A: What Will Replace Brakes With a Sticker That Reads 023-106-00?
- Q&A: Instructions to Wire a Trailer for Electric Brakes
- Q&A: How to Measure to Determine the Size Trailer Brakes Needed For Hydraulic Drum Replacement
- Article: Trailer Lighting Requirements
- Article: Dealer Spotlight - Croft Trailer and Hitches
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
- Article: Trailer Wiring Diagrams
- Article: Parts Needed to Add Electric Drum Brakes to a Trailer
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)