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Brakes are Broke

4x4ord
Explorer III
Explorer III
Iโ€™ve got disc brakes on my fiver โ€ฆ. they stop the trailer great but something seems broke. If I set my truck to electric over hydraulic I get a โ€œtrailer disconnected โ€œ warning if I apply the brakes momentarily then release and reapply the brakes โ€ฆ. release again and reapply the brakes again. It happens every time on the third application. When the โ€˜trailer disconnected โ€œ message is displayed the brakes continue to function as expected. Iโ€™ve got two identical 2022 F350s and both trucks behave the same way when hooked to that trailer (the only trailer I have with electric over hydraulic brakes). Another bit of interesting observation is that if I set my brake controller to โ€œelectricโ€ rather than โ€œelectric over hydraulicโ€ I donโ€™t get the message. What do you all think? Is there a problem with my trailer or Fordโ€™s software? The first time I noticed this was pulling the trailer with my 2022 โ€ฆ.. but itโ€™s possible something happened to the fiver since my โ€œ21 was hooked to it. For instance I did accidentally leave the emergency brake away unplugged for about an hour which kept the hydraulic pump running nonstop which in turn got the brake fluid and wiring extremely hot.
2023 F350 SRW Platinum short box 4x4.
B&W Companion
2008 Citation Platinum XL 34.5
15 REPLIES 15

opnspaces
Navigator II
Navigator II
Admittedly no idea. But I would probably get a wire, even an old set of jumper cables and make a temporary ground. Just connect from a bolt or bare piece of steel on the trailer to a bolt on the truck and try again. It doesn't cost anything and only takes a minute to eliminate a grounding problem.
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2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup