SG258G 24V Turn Signal Flasher Relay, 3-Pin 120W Electronic Blinker/Hazard Flash Module, Plug-in Replacement with B/E/L Terminals, OE#SG258G

SG258G 24V Turn Signal / Hazard Flasher RelayThis is a 24V electronic flasher relay designed for turn signals and hazard/4-way flashers on vehicles that use an SG258G-style, 3-pin socket. It is sold as a replacement part - please confirm compatibility before purchase.Key SpecsModel / OE marking: SG258GSystem voltage: 24V DCLoad rating: up to 120W (total lamp load on the flasher circuit)Terminals: 3-pin (commonly labeled B = Battery, E = Earth/Ground, L = Lamp/Load)Use: turn signal flasher relay / hazard flasher relay (blinker module)What It Helps With (non-absolute)Intermittent or no turn-signal flashingErratic flash rate caused by a worn flasher relayHazard lights that stop working due to a failing flasher unitInstall NotesDisconnect the negative battery cable before replacement.Find the flasher relay socket (often in a relay/fuse panel or under the dash - confirm in your vehicle manual).Match the terminal letters and pin layout to your original relay before plugging in.After installation, test left/right turn signals and hazards.Fitment reminder: Because SG258G is commonly marketed as a universal-style 24V flasher, we do not list specific year/make/model applications. Confirm fitment by OE marking 'SG258G', 24V system voltage, and the same 3-pin B/E/L socket layout shown on your original relay or in the service manual.

• 24V DC Electronic Flasher Relay for Turn Signal/Hazard - Model/OE#: SG258G. 3-pin plug-in (3 prong / 3 terminal) flasher module rated up to 120W total lamp load; terminal letters commonly marked B (Battery +), E (Earth/Ground -), L (Lamp/Load). A 24 volt turn signal relay / hazard relay used to control indicator flash timing on the flasher circuit. Replace a worn or intermittent unit to restore consistent blinking and reduce no-flash, stuck-on, or irregular flash speed symptoms. For LED conversions, confirm your flasher type/load requirements
• Install/Replace Tips: Disconnect the negative battery cable before servicing. Locate the turn-signal/hazard flasher socket (often in a relay/fuse panel or under-dash relay bracket - confirm location in your vehicle manual). Pull the old flasher straight out, compare the pin layout/spacing and terminal letters, then plug SG258G fully into the socket. Some 3-pin flashers may swap terminal positions, so verify B/E/L orientation against the markings on the original relay or wiring diagram. Check the turn-signal/hazard fuse, clean oxidized terminals, and test left/right/hazard after install. 24V systems only - do not use on 12V circuits
• Fitment (verified by OE/pinout, not by vehicle list): This listing does NOT claim specific year/make/model fitment because SG258G is commonly sold as a 24V universal-style flasher for commercial 24V applications (trucks/buses and other 24V vehicles). Confirm fitment by matching: 1) OE/marking 'SG258G', 2) 24V electrical system, 3) 3-pin socket with B/E/L letters (or equivalent) and the same pin arrangement as your current flasher, and 4) use in the turn signal / hazard circuit. If your vehicle is 12V, look for the 12V variant (often labeled SG158G) instead
• Common Symptoms a Failing Flasher Can Cause: turn signals not blinking, blinking too fast/slow, random speed changes, no click, signals stuck ON, intermittent hazards, or one side flashing inconsistently. Replacing the flasher relay is a practical first step when bulbs, fuses, and wiring check out. After install, test left/right indicators and hazard switch; if the pattern is abnormal, re-check terminal seating and ground, and confirm your lamp load is within the flasher rating. When troubleshooting, always use the vehicle wiring diagram/service manual for the circuit.
• Related/Complementary Items (traffic-friendly, no guessing): keep spare turn-signal bulbs/LEDs (if applicable), fuse(s) for the turn-signal/hazard circuit, and a basic terminal cleaner/connector kit - many flashing issues come from poor contact, loose terminals, or blown fuses. Other common companions in the same circuit path include the hazard switch and turn-signal switch; inspect connectors if problems persist after flasher replacement. For fleets using 24V systems, a spare SG258G flasher relay in the glove box/tool kit can reduce downtime. Always verify the circuit and socket style in the service manual before ordering multiples