When a motorhome won't start, the battery is the first suspect for good reason. But there are a handful of other battery-related causes, and a few that have nothing to do with batteries at all.
What you hear tells us a lot
- Rapid clicking: usually a weak battery or a bad connection. The starter is trying but can't get enough current.
- One loud click, then nothing: could be a weak battery, a bad starter or a bad connection at the starter.
- Nothing at all, no dash lights: often a disconnect switch, a main fuse, or a completely dead battery.
- Cranks but won't fire: usually not the battery. Think fuel, or on diesels, cold-start systems or safety shutoffs.
Battery-side causes
- Chassis battery discharged or failed. Very common after storage.
- Chassis disconnect switch off. Many Class A coaches have one.
- Corroded or loose cables, at the battery or the starter.
- Boost or aux start solenoid stuck or failed. This can also cause batteries to drain each other.
- Alternator not charging, which leads to a dead battery after a day of driving.
Things that aren't the battery
The transmission not fully in park or neutral, a tripped safety interlock, a fuel problem, or an engine fault. If the batteries test good, we will say so, and you will know to call an RV mechanic instead.
Get help
Text us where you are. We will test, jump start or replace as needed.