Signal Troubleshooting: Why Your Fence Stopped Working

Read the indicator on the transmitter:

• Lit loop indicator: check its documented meaning; a partial break or dead zone can remain. Continue with receiver and full-system testing rather than assume the whole loop works.
• Red or blinking: match the pattern to the actual manual, then perform its supported tests. The wire-alarm checks organize connection and loop checks without treating one indicator as a diagnosis.
• All lights off: review the outlet, approved adapter, connections and fuse where fitted, using the actual procedure. Do not rule out other faults from this symptom; the power checks can help organize the review.

Alarm meanings vary by model. Read the documented pattern before deciding which power, loop, receiver or full-system test applies.

Power off the transmitter. Pull both wires from the terminals and look for:

• Corrosion (greenish or black buildup)
• Copper not fully seated in the terminal
• Insulation pushed into the terminal instead of bare wire
• Moisture inside the terminal block

Strip 3/8-1/2 inch of fresh copper (check your manual), reconnect, and check the loop light. Loose, corroded or wet terminals are a practical check, but an alarm does not identify the fault. Use the actual manufacturer's system test before blaming buried wire or a component.

Own a multimeter? Ohm out the loop: with both ends disconnected, measure resistance across them. An open circuit confirms a break; compare the reading with the actual conductor, length, temperature and manufacturer guidance; wire selection affects the interpretation. A continuity reading checks whether an electrical path is present; it does not rule out partial, high-resistance or intermittent faults, and it does not locate a break.

Take the collar off the dog for every test. Clip the test light across the collar's contact points and carry it at dog-neck height toward the boundary.

• No flash: check the compatible test tool, expected mode, power indicators and actual battery or charging instructions. Use collar troubleshooting or manufacturer help for an unexplained result; one missing flash does not identify the failed part.
• Flash: output occurred at that point and time, which does not prove consistent operation around the full route. Test the complete boundary, review the actual receiver's fit and settings, and assess training and suitability before assigning the cause.

For broken loops that Step 2 didn't fix, cheapest method first:

1. A supported divide method. Use only the manufacturer's documented compatible isolation procedure; do not assume an improvised jumper loop or one status light diagnoses every transmitter or fault.

2. AM radio where supported. The transmitter must have a detectable compatible signal and continue transmitting with the fault present. Follow the applicable procedure; silence alone neither locates nor identifies every fault.

3. Wire locating equipment. Select a locator or fault finder suited to the conductor, route and suspected fault, and follow its connection and test instructions. Some equipment detects particular insulation or ground faults; a generic locator does not guarantee a one-foot result or rule out a partial break. Confirm current rental charges and availability. Our Locate & Repair kit (our store) is an owned-store option; review its actual capabilities before choosing it.

After confirming the fault, use the actual equipment and connector's compatible waterproof repair method; see wire repair. Useful inspection points include:

• Corroded, damaged or unsuitable connections; intermittent behavior alone does not prove a splice fault
• Driveway and sidewalk crossings, especially plow and shovel edges
• Bed-edging lines and anywhere the yard was aerated or dug
• The wire's exit point from the house

If the loop is intact but the warning fires in odd places, walk the area with the test light and note where it triggers. Common sources:

• Nearby utility conductors: identify them safely, follow the actual equipment's routing and separation instructions, and use supported tests before assigning a cause
• Transmitter placement near metal or appliances: compare the actual measured clearances with the model's instructions, then test the affected area off the dog
• Metal fences, downspouts, rebar in concrete, and metal sheds along the wire path

Rerouting a leg away from metal is a layout change, and the layout patterns guide shows the clean options.

The width dial sets signal strength, not feet. The numbers don't map to a distance. After any repair:

1. Take the collar off the dog and clip on the test light.
2. Hold the collar at dog-neck height and walk toward the wire until it beeps.
3. Follow the actual transmitter and receiver's supported field-setting procedure, with the receiver off the dog. Retest the complete route, warning and output behavior and usable safe area before suitable training or yard use.

Full procedure: setting boundary width and testing.