What Parts Needed to Convert 4-Pole Connector on Tow Dolly to Match Motorhome Connector

Question:

i have a class a motor home with a 6 pin square connector on it and want to tow my car dolly which has a 4 pin flat connector, will the Adapter 4 Way Flat to 6 Way Square for Jayco work? the motor home has separate brake lights separate from the turn signals. thank you

asked by: Joe B

Expert Reply:

If your tow dolly uses a 4-pole trailer connector this means it has only stop/turn/taillights, but not electric brakes. If your Class A motor home uses a connector like # 37995 you can simply wire in the trailer-side part of this item in place of your existing 4-pole. This will provide a more reliable long-term connection than an adapter. Adapters are definitely convenient, but the additional contacts they introduce can cause connection issues if corrosion or contaminants get in. Wiring in the matching 6-pole connector on the dolly using butt connectors # 05730-5 will be your best bet.

You'll want to match the wiring by function, not by color. If you have a tester like # PTW2993 you can confirm what each wire on the MH connector does and then match it up to 4 of the 6 leads on part # 37995. I linked a video that shows how to use the tester.

expert reply by: Adam R