Part No. 102916 S-100 • S-105 • S-120 • S-125 4 - 65January 2016 Section 4 • Repair ProceduresLIMIT SWITCHES2 Activate the limit switch. Connect the leads froman ohmmeter or continuity tester to the deutschconnector terminals in the combination listedbelow and check for continuity.terminal 1 to 2 no continuity(infinite Ω)terminal 3 to 4 no continuity(infinite Ω)terminal 1 to 3 and 4 no continuity(infinite Ω)terminal 2 to 3 and 4 no continuity(infinite Ω)terminal 5 to 6 no continuity(infinite Ω)Proximity Switch:1 Connect the leads from an ohmmeter orcontinuity tester to the deutsch connectorterminals in the combination listed below andcheck for continuity.terminal 3 to 4 no continuity(infinite Ω)2 Locate the target area of the proximity switch.Proximity switcha target areaa3 Place a piece of ferrous metal (steel, iron, etc.)in front of the target area so it is no more than1/2 inch / 12.7 mm away from the target area ofthe proximity switch.4 Connect the leads from an ohmmeter orcontinuity tester to the deutsch connectorterminals in the combination listed below andcheck for continuity.terminal 3 to 4 continuity(zero Ω)5 Move the piece of ferrous metal (steel, iron,etc.) so it is more than 1 /2 inch / 12.7 mm awayfrom the target area of the proximity switch.6 Connect the leads from an ohmmeter orcontinuity tester to the deutsch connectorterminals in the combination listed below andcheck for continuity.terminal 3 to 4 no continuity(infinite Ω)How to Adjust the Limit SwitchesNote: Perform this procedure on a flat and levelarea and free from obstructions.1 Fully retract the boom.2 Place a digital protractor or digital level on topof the boom tube.