Does Custer 7-Way Round to 7-Way Blade Adapter Have Signal Converter in It
Updated 09/29/2025 | Published 09/09/2025
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Question:
A 7 round on a semi truck has the brake lamps going thru the red wire stop cirucuit. On a rv plug the brake lamps go thru the turn signal circuits. Will this adapt the stop lamps correctly?
asked by: Shawn S
Expert Reply:
Hey Shawn, this is a great question but no the Custer 7-way round to 7-way blade adapter does not have a converter in it so that the separate signal circuits are combined. Basically this adapter is designed to just convert the styles of 7-way but not actually go from the semi truck style to RV style of wiring. To convert the signals you would need an converter like the part # RM-732 which you could splice into this adapter if you wanted.
Sometimes in situations like this you can wire in a second 7-way blade connector on the tow vehicle and then wire the converter to it. So you'd need the # RM-732 as well as a 7-way socket like the part # PK11893 and harness part # PK11998 to do that.
Product Page this Question was Asked From
Custer Trailer Connector Adapter - 7-Way Round to 7-Way Blade
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 7 Round to 7 Blade
- Plug and Lead
- Custer
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Jameson C.
9/29/2025
Hey Shawn, did you have a chance to try using the converter and additional 7-way socket to adapt the stop lamps correctly? I'm curious to know how it worked out for you, as it could help others facing a similar wiring challenge.