Which Post On My 7-Way is the 12 Volt Power Source

Question:

I Have No Hot Post On My 7way To Make The HM47675 Work. Witch Post Should Be Hot?

asked by: Rex B

Expert Reply:

The 12v lead should be connected to the first prong clockwise from the top of your 7-way plug, but you will need to double check your existing application to confirm that it is wired this way. The color of this wire is typically black.

I would recommend you use a Hook Probe Circuit Tester # PTW2993, to determine if you have power at this post. If not you should check the wiring on the back of the 7-way connector and then follow it back looking for any cuts, or corrosion that might be shorting out the wire.

I attached a picture to the right that shows how 7-ways are typically wired.

I also attached a link to an FAQ page on trailer wiring that you might find informative.

expert reply by: Jameson C