Why is the first boom section on my Liebherr LTM 1400 not unlocking even though the solenoid valve is working?

[Emmanuel M.]

I'm having an issue with my Liebherr LTM 1400 (1998 model) and hoping someone here has dealt with this before. The first boom section will not unlock. I already checked the solenoid valve, and it seems to be working fine, but I'm missing power on wire No. 110. So far:

• Solenoid valve tested okay
• Boom still won't unlock
• No power reaching wire 110

I'm trying to figure out where to look next before I start tearing deeper into the electrical system. Could this be a relay issue?