I recently got a CFTBL and noticed the flashers weren’t working. It has a Rotten dog driver board and cpu board. Opened the head and noticed the 20v LED isn’t lit. I have checked the fuses and they are all good. The interlock switch is good but strangely doesn’t have any effect when opened. The voltages at J102 connector are
When plugged in
Pins 1&2 - <1 VAC
Pins 3&4 - 16.6 VAC
When NOT plugged in
Pins 1&2 - 11 VAC
Pins 3&4 - 5 VAC
Not sure where to go from here. Any ideas?