Converto Airborne Dump Trailer - Wiring -
B1 - 70" to "3 way connector block then 52" for each leg to light.
B2 - B3- B4 -  123" each
Wiring measurements - From switch to tailights
These measurements are based on Converto wiring that I have observed however it was not proven accurate from an original wiring harness or diagram.  The dimensions are based on my observation and measurement of a trailer that was equipped with a wiring harness of unknown origin.   They could be accurate however, they may not be.   These dimensions should get you started.  You should investigate and use all resources to successfully and accurately complete your specific wiring  task.   Thanks
Daves 1942 Willys
Displayed above is the routing of the wiring harness on a Converto as seen at the 2004 MVPA - Alameda Convention.
Converto Airborne Dump Trailer - Wiring -
tailight l/s (back)
tailight wiring
along frame
another view
of wiring
Trailers were equipped with Cole - Hersee light switch
Mounting of the switch & pigtail
As of this time I am not aware of when the tailights were installed on Converto Dumping Trailers
Check frame routing of wiring
Which dummy put his hand over the lense?