Why truck and bus batteries go dead
Dead batteries happen in every season. A driver leaves the headlights or interior lights on, a coach sits at a stop with the radio or the PA running, or a unit is parked for a week with something drawing power in the background. Batteries also wear out with age, and a failing alternator or a loose connection will drain a bank that looks fine on paper. Cold mornings add to it, because a cold diesel needs more current to turn over, but in our world the call is just as likely to come on a July afternoon.
12V and 24V truck and bus battery systems
Most North American transport trucks run 12 volt systems with several batteries wired together, while many motor coaches and some buses run 24 volts. Boosting the wrong way can damage electronics, so we boost each system at its own voltage with equipment built for heavy-duty battery banks.
What happens on a battery boost call
- Boost the unit at the right voltage, 12V or 24V, with equipment sized for truck, bus and coach battery banks.
- Check why it failed. Batteries, cables, connections, starter and charging system all get looked at.
- Tell you straight whether the batteries are fine, need a charge or are due for replacement.
How to keep heavy-duty batteries healthy year-round
- Check that lights, radios, PA systems and chargers are off before walking away from a parked unit
- Keep battery terminals clean and cable connections tight
- Do not let a unit sit for days without running if it has a parasitic drain
- Have batteries and alternators tested once a year, before they fail
- In cold weather, plug in block heaters and check the cords for damage
Battery boosting from Halifax to Truro
We take boost and no-start calls across Halifax, Dartmouth, Bedford, Hammonds Plains, Lower Sackville and Mount Uniacke, and along the 102 through Fall River, Enfield, Elmsdale, Stewiacke and Truro. If the unit starts but the heater does not, see truck, bus and motor coach HVAC. Fleets with several parked units can add regular battery testing to a maintenance contract.