Maintenance InstructionsHigh Current RelayCAUTIONTo prevent property damage, when servicingthe isolation battery, be sure that all cablesare connected correctly to prevent damageto the high current relay and other electricalcomponents.1. High Current Relay2. Battery Box (Back)The main vehicle’s battery box is equipped with a high currentrelay to isolate one battery during the auto start / stop crankoperation and to stabilize power to electrical system controllers.Electrical Charging and Starting System TestAt every Preventive Maintenance (PM), fully charge thebatteries using an automatic float charger. Then, have aqualified technician perform an electrical system test using anInternational® Electronic System Tester (Midtronics in TELLECTEXP HD Expandable Electrical Diagnostics Platform availablethrough your local International dealer) to catch electrical systemproblems before they cause further damage to the batteries andprevent a stranded vehicle. The test will check for alternatoramperage output, starter current draw, and battery amperagecapacity. This type of testing will detect weaknesses that maynot yet be apparent during normal daily operations.Terminal Inspection-Cleaning-Corrosion ProtectionPeriodically inspect electrical connectors on the engine, battery,and frame for corrosion and tightness. Inspect exposed cablesfor fraying or signs of abrasion. Exposed terminals, suchas cranking motor, alternator, and feed-through studs shouldbe cleaned and recoated with a dielectric grease, such asFleetrite® 472141–C1 or equivalent paste or spray protectant.The inspection / cleaning / corrosion protection should includefeed-through connections, power and ground cable connectionsfor batteries, engines, and the starter stud.Connectors that are more subject to corrosion may bedisassembled and sprayed internally with a light coating ofdielectric grease. Use grease sparingly, as too much grease willnot allow air to escape from the connection and this compressedair will push out the seals in the electrical connectors.217
