Alternator & Battery Testing, Service, Installation, and Charging
Comprehensive electrical system care to keep your trucks operating reliably and safely.
What we inspect and test
Battery health: conduct load and conductance tests to determine state of charge, capacity, and remaining service life. Identify sulfation, corrosion, and weak cells.
Charging system: measure alternator output across RPM ranges, test voltage regulator performance, and inspect charging circuits for voltage drops and intermittent faults.
Starter and related components: check starter draws and wiring connections that affect charging and cranking performance.
Wiring and terminals: inspect battery cables, grounding straps, connectors, and chassis ground points for corrosion, looseness, or damage that can cause poor charging or parasitic drain.
Services we provide
Diagnostic testing: full electrical system diagnostics using OEM-level procedures and professional testers to identify root causes — not just symptoms.
Charging system repairs: alternator replacement, pulley and belt inspection/repair.
Battery service: cleaning terminals, applying corrosion prevention, securing mounts, and ensuring proper ventilation where required.
Preventive maintenance: scheduled testing as part of fleet maintenance plans to reduce roadside breakdowns and extend battery/alternator life.
Safety checks: confirm emergency lighting, ABS power, telematics power, and other critical electrical loads are functioning within spec.
Replacement and installation
OEM-equivalent parts: supply and install batteries and alternators matched to original equipment specifications or upgraded units where required.
Proper sizing and specification: select batteries with correct CCA, RC, and reserve capacity for severe-duty applications and alternator output sized for vehicle electrical load.
Professional installation: torque and terminal protection, correct cable routing, secure mounting, belt tension adjustment, and verification of charging performance post-install.
Warranty support: parts and workmanship warranties aligned with fleet service agreements.
Charging solutions
Onboard charging: verify alternator charging profiles and ensure proper regulator function for smart/variable-voltage systems.
Offboard charging: controlled-rate chargers for battery recovery and storage charging that prevent overheating and overcharging.
Emergency charging and jump starts: safe procedures and equipment to minimize risk to electronics and personnel.
Battery conditioning: equalization and desulfation programs for lead-acid batteries when appropriate.
Why this matters for fleets
Reduced downtime: proactive testing and timely replacement prevent unexpected failures and roadside service calls.
Improved safety: reliable starting and stable electrical systems support lighting, ABS, braking, and safety devices.
Lower total cost of ownership: targeted repairs and preventive maintenance extend battery and alternator life and reduce repeat failures.
Regulatory compliance: maintain critical systems for inspections and on-road safety programs.
How JB Fleet Management handles it
Mobile service capability for on-site diagnostics, repair, and battery/alternator replacement to minimize vehicle out-of-service time.
Fleet-tailored maintenance schedules with documented test results and recommendations.
Certified technicians trained on heavy-duty and commercial vehicle electrical systems.
Clear reporting: test results, repair descriptions, part numbers, and next recommended actions provided after each service.
Request a service or schedule fleet testing. Contact JB Fleet Management for alternator and battery system inspections, preventive maintenance plans, and rapid on-site repair and replacement services designed to keep your fleet moving.
