Most RV breakdowns and roadside emergencies aren’t random — they’re predictable failures that a 15-minute walkaround would have caught before departure. Flat tires, leveling jacks left down, awnings that unlatch at highway speed, slide-outs that didn’t fully retract — these are the calls San Diego RV Center gets from owners who skipped the pre-trip walkthrough. We’ve been handling the aftermath since 1990. This checklist covers the 15 things to inspect before every trip, whether you’re driving three miles or crossing into Arizona.
1–3: Tires, Lug Nuts, and Wheel Condition
Every pre-trip inspection starts at ground level. Check tire pressure cold — before the vehicle has moved — against the manufacturer’s placard rating on the driver-side door frame. Pressure that looks fine warm may be significantly under the recommended cold rating. According to the National Highway Traffic Safety Administration, underinflation is the leading contributing factor in tire-related crashes for large vehicles — heat builds faster in an underinflated tire, and on a San Diego-to-Vegas run, that can mean a blowout before you reach Baker.
Check #2 is a visual of each sidewall: look for cracking, bulging, or uneven wear that wasn’t there last trip. Check #3 is the lug nuts — rust streaks radiating outward from the lug pattern, or any visible wobble in the wheel, means don’t drive until a technician looks at it. Our RV maintenance services include a full tire and wheel inspection whenever you bring the rig in.
4–6: Lights, Signals, and Brake Lights
This takes two minutes with a partner or a reflective surface. Run through: headlights on low and high beam, taillights, left turn signal, right turn signal, brake lights (hold the pedal while someone confirms), and emergency flashers. Towing a trailer? Confirm the trailer brake lights and signals are synced — state patrol and CHP actively look for this, and a burned taillight on a 40-foot fifth-wheel is a hazard to every driver behind you at night.
If a bulb has burned out between trips — which happens — note it and fix it before departure, not after you’ve already loaded up and connected the toad. Keeping a spare set of the most common bulb types in your tool bay means a five-minute fix instead of a delayed departure.
7–9: Slide-Outs, Leveling Jacks, and Awnings
Driving with a slide-out extended or a leveling jack partially deployed is one of the most costly pre-trip mistakes in RV ownership. Check #7: visually confirm each slide-out is fully retracted and the indicator light shows green. Check #8: walk the perimeter and verify every leveling jack is fully up — look up from below, not just at the controls. Check #9: confirm the awning is fully rolled, latched, and any loose pull straps are secured.
Slide-outs that hesitate during retraction before departure often indicate a seal or motor issue that will worsen. Our slide-out repair services diagnose both mechanical and electrical causes for all makes and models — if it’s not retracting cleanly, address it before the trip, not at the campsite.
10–11: Hitch, Fifth-Wheel, and Tow Connections
For anyone towing a trailer or fifth-wheel: Check #10 is the physical connection. For a ball hitch, verify the coupler is fully seated and the latch handle is locked — pull up on the tongue to confirm it won’t pop. For a fifth-wheel, confirm the kingpin is engaged and the jaw is fully closed. Then tug the trailer forward hard by hand. A solid connection doesn’t move. One that shifts means something isn’t locked.
Check #11: safety chains should be crossed under the tongue (or connection point) and have enough slack to turn but no excess dragging. The breakaway cable attaches to the tow vehicle separately from the chains — if the trailer separates, the cable triggers the trailer brakes independently. According to Good Sam Roadside, the breakaway cable is the single most commonly skipped tow connection — and it’s the one that matters most in an actual separation event.
12–13: Propane, Cabinets, and Interior Latches
Check #12: close the main propane valve on the tank before driving. An open propane supply line to an active appliance while the vehicle is in motion creates fire risk in any collision, however minor. Exception: if your refrigerator requires propane while traveling (many newer units auto-switch to 12V), check your owner’s manual — but the stove and water heater should be off and the main closed if possible.
Check #13 is the interior walkthrough: every cabinet latch latched, the refrigerator door secured (use the travel latch, not just the magnetic seal), and anything on counters or tables stowed or secured. What looks stable parked becomes a projectile through a hard brake application. A microwave door left unlatched has broken before in transit — it’s a 60-second walk-through that prevents damage and safety risks.
14–15: Roof Vents, Roof Clearance, and Mirrors
Check #14: confirm every roof vent is closed and latched. An open vent at highway speed can pull off in seconds and leave a hole in your roof membrane — a repair that starts at several hundred dollars. While you’re thinking about the roof, do a quick visual from a vantage point if possible. If you noticed any soft spots, staining, or bubbling on your last trip, this is when to look, not after another few hundred miles. Our guide to RV roof sealing signs covers what to look for. If you see damage, our roof repair team can assess it before you leave.
Check #15: adjust your mirrors before pulling out of the site or driveway, every time. Mirror position changes when cargo shifts, when a slide-out was extended overnight, or simply when someone else used the vehicle. Confirm your backup camera is functional if equipped. Parking spots don’t come with obstacle alerts — your mirrors do.
When the Walkaround Finds Something
A pre-trip inspection that finds a problem has done exactly what it’s supposed to do. The question is what you do next. For tire issues, lighting failures, or anything that affects vehicle control — brakes, steering, or visible fluid leaks — don’t drive until it’s resolved. For minor cosmetic issues, log them and address at your next service appointment.
San Diego RV Center serves El Cajon and all of San Diego County, and we’ve been doing pre-trip diagnostics for owners who need a second opinion since 1990. If your walkaround turns up something you’re not sure how to classify, call us at (619) 561-3531 — we’ll tell you whether it needs a shop visit before you drive.
Frequently Asked Questions About RV Pre-Trip Inspections
How long does a pre-trip RV inspection take?
A complete 15-point walkaround takes 10 to 15 minutes once it becomes a habit. The first few times you do it systematically, allow 20 to 25 minutes. Building it into the departure routine — doing it every time, in the same order — is how it becomes fast and reliable.
Should I do a pre-trip inspection for short local trips?
Yes. The checks that matter most — slide-outs, jacks, and tire pressure — aren’t distance-dependent. A leveling jack dragging on asphalt does the same damage whether you’re driving two miles or 200. Short trips also tend to be the ones where owners get complacent, which is exactly when these checks get skipped.
What if I find a problem during the walkaround?
Anything affecting vehicle control — tires, brakes, lights, or a hitch that won’t lock — means don’t drive. Contact us to schedule a same-day or next-day inspection if the issue is ambiguous. For cosmetic or minor items, document them and address at your next service interval.
Is a professional pre-trip inspection different from doing it myself?
A professional inspection goes deeper — brake pad thickness, fluid condition, bearing play, and roof membrane integrity are things that require equipment or experienced eyes to assess. Our professional maintenance inspections are recommended before any extended trip or seasonal travel, alongside the daily walkaround you do yourself.
Found Something on Your Walkaround?
San Diego RV Center has been diagnosing and repairing every type of RV issue in El Cajon and San Diego County since 1990. If your pre-trip inspection turns up something you’re not sure about, we’ll give you a straight answer.
Schedule an Inspection or call us at (619) 561-3531.