Howdy,

My wife and I just bought 99 lariat to tow our boat with. Our boat trailer has surge brakes and you have to provide an override from the backup lights in order to prevent the trailer from locking up when you put it in reverse. The truck has the factory hitch and harness but the adapter that came with the truck is for a standard 4 pin. Does anybody know how I should go about finding a 5 pin adapter wired for surge brakes, maybe even a part#?

Thanks

 

cast,
Don't 5 know pin connector PN.

However, I just installed the blocking solenoid on my boat trailer and rewired the harness on the tongue for the 7 pin connector on my truck (which includes the back up light circuit).

Do you have the 7 pin connector on the truck? If so, wire a new connector like I did. If you are not that mechanically/electrically inclined, have an RV or boat shop do it.

I also added a short 4-pin pigtail so I could connect the trailer & lights to my buddy's truck, that does not have the 7 pin harness.

Hope this helps.

Tony

 

This must be the newer electric over hydrolic? Mine are straight hydrolic and sometimes that dang lock out won't stay locked making backing it frustrating. Last weekend it worked perfectly. Maybe I'm just getting used to it.

 

This is what I would do. I'd convert the trailer to a 4 pin connector and put a separate connector on the reverse solenoid. Then I'd find the wire that goes to the reverse light on your truck and jumper it with a matching connector for the solenoid on the other end.

Otherwise, you may want to upgrade to a 7 pin connector and you can get the connector and tha harness from a Ford dealer. Somebody like U-haul might have the harness too, hopefully at less cost. If you go the 7 pin, you'll have to convert the connector on the trailer. This solution costs more, but it's the right way to do it. The first way is how I would do it because it's cheap and functional.

You must have disc brakes on that trailer.