1990 CAT 446B transmission problem

[Puertopal]

Hello,
To introduce myself, I'm Olivier, French, owner of a 1990 CAT446B in Palawan, Philippines and I need your help to let me solve my transmission problem:
Each time I try to go in reverse the fuse blow up, forward is working perfectly!
I have checked the wiring at the back of the panel, no problem.
Oil and filter are new.
Thanks in advance for your help.
Olivier

 

[Vetech63]

Unplug the reverse coil and see if it still blows the fuse. If it does, you have a wiring short in that wire circuit. If the fuse doesn't blow, you have a shorted coil.

 

[Puertopal]

Hello,
Thank you for your answer, the reverse coil is the number 5 on the attached file?