Trailer lights not working? Prepare for mobile service in Calgary

Describe the failed function, not just the bulb

A useful service request says which lights are affected: running lights, brake lights, turn signals, side markers or the licence-plate light. Note whether the concern is on one side, at one lamp or across the trailer, and whether it is constant or intermittent. Use observations you already have; do not tow the trailer or recreate an unsafe fault to obtain a video. The RCMP recommends checking trailer brake and signal lights before towing. If lighting is not working, arrange assessment before the next trip rather than treating the tow vehicle’s lights as a substitute.

Include the tow vehicle and connection details

Send the trailer type, make, model and year if known, plus the tow vehicle’s year, make and model. Photograph the trailer plug, vehicle socket and any adapter from a safe, accessible position. Say whether an adapter or wiring component was recently changed and whether the same combination worked previously. Stirling’s owner resources treat lighting connections, connectors, lamps and fuse concerns as distinct topics. Ask the team whether the tow vehicle should be available during the visit so the agreed assessment can cover the connection as well as the trailer.

Explain when the problem appeared

Recent storage, wet weather, a lamp replacement, body work or a change of tow vehicle may be useful context. Describe what happened without deciding the cause: for example, “The left turn signal stopped working after the trailer came out of storage; the right signal still worked.” Include an existing dashboard warning or brake-controller message exactly as displayed. A lighting symptom does not establish whether the fault is in a lamp, connector, trailer wiring or the tow vehicle. Do not bypass fuses, bridge connector pins or alter wiring to make the lights operate.

Keep lighting and braking requests separate

Tell the office about braking concerns, a damaged breakaway cable or other running-gear symptoms as additional items. Working lights alone do not establish that trailer brakes, tires, bearings or the coupling are in serviceable condition. State whether this is a utility, work or cargo, horse, or boat trailer so the team can select the appropriate service scope. For a horse trailer, arrange the appointment without animals present. For a boat trailer, describe whether the boat is loaded and whether it limits access to wiring or lamps.

Prepare the location and agree the assessment

Provide the service address, gate or storage-stall instructions and permission for work at that location. Explain any cargo, covers, locked compartments or tight parking that restrict access. Share photos of visible damage or corrosion without opening sealed lamps, cutting wiring or crawling beneath an unsupported trailer. Use the booking button below to start a trailer service request and identify the trailer type in your notes; the office reviews the equipment, work area and availability before confirming. Ask whether diagnosis, replacement parts and any return visit will be quoted separately.

Save findings that help the next appointment

Keep the service date, trailer identification, affected light functions, work completed and replacement part references with your maintenance records. Ask the completion notes to distinguish items repaired and verified from inaccessible areas, intermittent faults that were not reproduced, or further work still recommended. The RCMP also recommends checking brake and signal lights at safe stops during an extended journey; a past repair does not replace checks for the next trip. If the concern returns, that record gives the technician a clearer starting point than another guess at a replacement bulb.

Sources & owner resources

Stirling Trailers: lighting, connector and maintenance resources

RCMP: proper towing of boats and trailers