Re: 6 pin to 7 blade connector
Reply #3 –
The hardest expense I had to justify was when someone bought a new to them rv and wanted "no charge or added expense", to hook up to their toad when they drove out. So much so that I just started writing offers including the wire to tow at no additional cost. The cost was then expensed to the deal.
The problem is many are not wired according to proper pinouts. (See following link to wireing help), So, it is important you test all the pins on both the rv and the toad, before you do that first connection. When you get something "new to you" often you are not aware of previous wiring issues and how they were corrected by the previous owner or tech.
U-haul and etrailer.com have many testers and adapters, just remember, best to test before you just plug the rv and toad togeather. You may be lucky and it works or just blows a fuse. And yes, I've also seen wiring harnesses destroyed.
Here is a 6 pin tester.
https://www.etrailer.com/Wiring/Tow-Ready/TR20116.html
This wireing/pin-out link may be of help.
https://www.etrailer.com/faq-wiring.aspx
I carry one of these 7 pin blade testers, to test my FT U295 7 pin, plug connector, and used it in the past to help others with wiring problems.
https://www.etrailer.com/Wiring/Pollak/PK12741.html
https://youtu.be/88Q5DjW3rBk