Optronics Wiring - A75TB
5-Way Flat to 7-Way Round Adapter - Single Piece
This is an adapter that converts the tow vehicle's 7-way round blade connector into a 5-way flat pin connector. This model is a one-piece device with one connector on each end.
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- Electrical Adapter for a 2008 GMC 1500 SLE
- The electrical adapter, item # A75TB, converts an existing 7-pole plug to a 5-pole flat. Do you have a 7-pole plug on your GMC? If not, you will need to install a 7-way plug, item # 30955.
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- Center Pole on a 7-Way End of Adapter A75TB
- The center pole on the vehicle end is for the auxiliary wire. I will attach our wiring FAQ below for your reference.
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- Compatability of the 7-way to 5-pole Connector with GM Avalanche and Hydraulic Surge Breaks
- If your Avalanche has the factory 7-way connector installed and working properly then the Adapter 7 Pole to 5 Pole Flat, item # A75TB, will work for you. The adapter will provide the 5 pole connection with the back-up circuit to lock out hydraulic surge breaks or power reverse lighting.
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- What Circuit is the 5th Pin on 7-Way to 5-Way Adapter for a 2005 Chevy Trailblazer
- The Optronics 7 Pole to 5 Pole Flat Adapter, part # A75TB, uses the center pin on your 7-Way as the 5th pin on the 5-Way side. Most 7-Ways are wired with reverse lights at the center, including factory installed 7-Ways, so the 5th pin should be the reverse light circuit.
This circuit is used on hyrdaulic brake trailers to lock out the brakes when backing up.
Check the cap on the 7-Way or in the vehicle owner manual to make sure that the center pin is in fact the reverse circuit.
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- Will 7-Way to 5-Way Adapter Part AT75TB Work with 4-Way Connectors as Well
- Yes, the A75TB, 7-Way to 5-Way adapter will also work with 4-Way connectors. It will leave the 5th pin exposed which can cause corrosion if you will be towing in the rain. Part # 37385 is another option. It has both a 5-Way and a 4-Way with covers to protect them from corrosion.
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