My 7 pin connector has no wire on pin #4, 5065e

Rmd8136 · May 23, 2017

Xfaxman said:
This is how my truck and trailer is wired:

View attachment 510367

Thanks! I am doing some more troubleshooting tomorrow

jd110 · May 23, 2017

I think you will find that the pin #4 does not have a wire. The 5E series don't have brake lights on the tractor, so there is no way to power brake lights on a trailer unless you wire in a switch on your own. The "reserve" label means that position is reserved for brake light, but is not equipped on this model. Can you provide a picture of the position of the blown fuse? What symptoms are you having with the blown fuse? What is not working? According to the diagram I have, there are a few 30 amp fuses. One powers the turn signal relays and one powers blower motors if cab equipped as well as others. I am not seeing one labeled ACC. Do you have a cab? Also, there are differences according to serial numbers. What is your serial number?

Rmd8136 · May 23, 2017

jd110 said:
I think you will find that the pin #4 does not have a wire. The 5E series don't have brake lights on the tractor, so there is no way to power brake lights on a trailer unless you wire in a switch on your own. The "reserve" label means that position is reserved for brake light, but is not equipped on this model. Can you provide a picture of the position of the blown fuse? What symptoms are you having with the blown fuse? What is not working? According to the diagram I have, there are a few 30 amp fuses. One powers the turn signal relays and one powers blower motors if cab equipped as well as others. I am not seeing one labeled ACC. Do you have a cab? Also, there are differences according to serial numbers. What is your serial number?

No symptoms. Everything works. Just know from measuring 12.8 volts across fuse stabs that right side has short. Location is 2nd from left on top row. Picture attached. Left fuse stab is hot from battery (12.8 volts to ground). Fuse labeled 30 amp ACC relay but is a buss , 2 blade fuse

rustyshakelford · May 23, 2017

jd110 said:
I think you will find that the pin #4 does not have a wire. The 5E series don't have brake lights on the tractor, so there is no way to power brake lights on a trailer unless you wire in a switch on your own. The "reserve" label means that position is reserved for brake light, but is not equipped on this model. Can you provide a picture of the position of the blown fuse? What symptoms are you having with the blown fuse? What is not working? According to the diagram I have, there are a few 30 amp fuses. One powers the turn signal relays and one powers blower motors if cab equipped as well as others. I am not seeing one labeled ACC. Do you have a cab? Also, there are differences according to serial numbers. What is your serial number?

5045e-5075e don't have brake lights. 5085/5100e do have them

Brett