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Discussion Starter · #1 ·
Hi,

Can anyone confirm that Pin 4 (12V - Charging) on the 7 pin connector is wired into 12 V by Ford?

I require Pin 4 to charge the batteries on a trailer I have rented. When I measure the voltage on Pin 4, it is 0V. However, I am wondering whether this is by design when there is not an actual connection to a load? I did set the traction control to "Tow" in case that is required to activate Pin 4.

I have sent a question into the dealer I purchased the Explorer from, but they seem to be busy just now.

Thank-you,

Rod
 

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08 Sport Trac 4.0L 4x4
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Ford indicates charging pin is # 5 often referred to as pin #4 on www as inserted image indicates

1138


Battery junction box charge relay is activated when ignition On or Aux..
Charge circuit 30A fuse #13 in battery junction box

1139

you should have battery voltage with ignition On according to 2008 manual..
charge relay is identical to fuel pump relay

I'm installing brake controller and seven pin connector on 08 Sport Trac that came without tow package,, happened to have shop manual out to research those circuits..
 

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Discussion Starter · #3 ·
Very informative. Thank-you. For the 2021 Explorer, I assume the Trailer Tow Relay is activated by selecting Trailer/Tow on the Drive Mode selector. I thought I had done that, but did not get 12V on Pin 4(Ford 5). I read elsewhere that a load must be detected before the 12V is activated, which may be a new Ford innovation. Will recheck.

Very much appreciate you taking the time to reply.

Cheers,

Rod
 
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