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Parts Needed To Create a 7-Pin to 7-Blade Adapter for Pulling RV Behind a Semi Truck  

Question:

I am looking for an adapter to go from a semi truck round pin to a rv seven blade thank you

1

Helpful Expert Reply:

While we do carry a Pollak Trailer Connector Adapter # HM47425 which will adapt from a 7-pin on your semi to a 7-blade it will not work properly since the brake lights are separate from turn signals on your 7-pin. Instead you will need to create your own adapter using the following components.

7-Pole, Round Pin, Trailer Wiring Connector # PK11700
7-Pole, RV Blade-Style Trailer Socket # PK12-707E
Tail Light Converter # HM48847

You will need some wiring for connecting the other circuits plus you will need to have a Brake Controller # HA100400C and wiring ran for the electric brakes used on the trailer.

I have included some wiring diagrams for the different connectors. Be sure to go by the function on the connector and not the color as they are not always going to match.

expert reply by:
1
Bud M
7-Way Trailer Side Connector Wiring
7-Way Trailer Side Connector Wiring
(click to enlarge)
7-Way Vehicle Side Connector Wiring
7-Way Vehicle Side Connector Wiring
(click to enlarge)
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Instructions for HA100400C
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