Solution for Connecting Truck with 4-Way Round to 7-Way Blade

Question

Question:

can you adapt 7 pin flat pins large round trailer connector to 4 pin round pins small round vehicle connector. 4 pin round is on a 1976 1/2 ton chevy and 7 pin round seems to be on every other vehicle and trailer

asked by: Randy

1

Helpful Expert Reply:

Your best option would be to cut off the 4-way round and wire in a 7-way blade connector like the part # PK11898 instead as there isn't an adapter for you situation.

Color - circuit - recommended wire gauge:
Red - Left Turn and Stop - 14 gauge
White - Ground - 10 gauge
Blue - Electric Brakes - 12 gauge
Green - Right Turn and Stop - 14 gauge
Black - Battery - 12 gauge
Brown - Running Lamps - 14 gauge
Yellow - Backup Lamps - 14 gauge

expert reply by: Jameson C

1

Answer 1

When wiring your Pollak 7-Way like part #PK11898 it is really important to connect your functions like what you can see in the attached photo instead of going by colors or slight differences in wire sizing. The exception to this is if your trailer is…

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Answer 2

I haven't heard of the Curt 7-way tester not working with OEM brake controllers. There was a Tekonsha tester that had problems with Dodge and GM trucks so it is possible. We have been able to confirm that the Pollak 7-Way to RV Socket LED Circuit…

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Answer 3

I believe the Reese Brakeman Brake Controller you mention is the same controller as the Activator IV Brake Controller, part #5504. You will want to make sure your controller is wired correctly. If you take a look at the attached instructions for the…

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Answer 4

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 5

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

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Answer 8

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 9

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 10

You are correct that this refrigerator does not have an ON/OFF switch or function. The best you can do is "Standby" that draws an unknown amount of power. One option is to pull the 12-Volt fuse at the RV power center. A much better option…

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Answer 11

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 12

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

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Solution for Connecting Truck with 4-Way Round to 7-Way Blade

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