Finding a reliable 4-pin LED flasher relay can stop hyper-flash and improve turn-signal reliability. The following selections cover popular 4-pin EP29 and EP26 relays, compatible with a range of models from Cadillacs to Jeeps. Each option is plug-and-play where noted and designed to restore proper blink rates for LED and non-LED bulbs alike. The list prioritizes compatibility, ease of installation, and known OE replacements to help you pick a solid upgrade for common culprits behind rapid or erratic turn signals.
| Product | Brand | Key Benefit |
|---|---|---|
| SOCAL-LED LIGHTING 4-Pin EP29 | SOCAL-LED LIGHTING | Plug-and-play LED flasher for hyper-flash fix |
| Dewhel LED Electronic Flasher EP29 | DEWHEL | 12V LED compatibility with 4-pin EP29 |
| Formiden EP26 4 Pin LED Flasher Relay (Pack of 2) | Formiden | Direct OE replacement for 56009339, LED upgrade ready |
| SYudwen 4 Pin EP26 LED Flasher Relay | SYudwen | Wide vehicle compatibility with plug-and-play |
| Fit4drive EP26 4 Pin LED Flasher Relay | Fit4drive | OE-style replacement for Jeep/Chrysler/Dodge family |
Note: All items listed are 4-pin relays designed to address hyper-flash, improve LED compatibility, and provide straightforward installation. Always verify pin configuration and physical dimensions to ensure a proper fit for your vehicle’s relay socket.
SOCAL-LED LIGHTING 4-Pin EP29 Flasher Relay

The SOCAL-LED LIGHTING EP29 is a 4-pin 12V electronic flasher designed to fix hyper-flash in turn signals. It replaces most standard factory EP-29 relays and is described as plug-and-play. Dimensions are approximately 1.5″ x 1.2″ x 1.2″, so users should confirm compatibility with their vehicle’s original relay size to avoid fit issues. The product targets vehicles suffering from rapid blinking due to LED upgrades and is positioned as a straightforward fix for a common electrical nuisance.
DEWHEL EP29 4-Pin LED Flasher Relay

The DEWHEL EP29 12V 4-Pin LED Flasher Relay is designed to address hyper-flash in turn signals for LED bulbs. It notes compatibility with 12-volt systems and emphasizes LED suitability. The size is listed as 1.2″ x 1.2″ x 1.5″, with a caveat to verify compatibility with the original relay’s dimensions. It is explicitly noted as fit for models including 1996-2005 Cadillac, Chevrolet, GMC, and Oldsmobile families, making it a strong option for those classic American vehicles.
Formiden EP26 4 Pin LED Flasher Relay (Pack of 2)

Formiden’s EP26 4 Pin LED Flasher Relay is sold as a pack of two and is marketed as a direct OE replacement for part number 56009339. It targets LED conversion to prevent hyper-flash and is described as a straightforward plug-and-play installation. The product emphasizes compatibility with Jeep TJ Wrangler (1997-2000), Dodge Grand Caravan, and Neon models, making it a versatile option for several older vehicles looking to upgrade to reliable LED signaling.
SYudwen 4 Pin EP26 LED Flasher Relay

SYudwen’s EP26 4-pin LED Flasher Relay is aimed at a broad range of vehicles, including Jeep TJ Wrangler (1997-2000), Chrysler Grand Voyager (1995), Grand Caravan and Neon models (1993-1999). It provides a OE-number reference of 56009339 and touts plug-and-play ease for quick, tool-free installation. The listing emphasizes compatibility and straightforward replacement, making it a practical option for drivers looking to upgrade to reliable LED signaling without complex wiring work.
Fit4drive EP26 4 Pin LED Flasher Relay

Fit4drive’s 4 Pin EP26 LED Flasher Relay is described as a factory-style replacement for Jeep TJ Wrangler (1997-2000) and other Chrysler-Dodge vehicles. It highlights compatibility with multiple Grand Caravan and Neon models, and notes replacing the OE part 56009339. The listing emphasizes reliable LED operation for turn signals and convenience through plug-and-play installation, suitable for those seeking a direct, no-fuss upgrade to fix hyper-flash.
Buying Guide
Key purchase considerations for 4-pin LED flasher relays include compatibility, ease of installation, and physical fit. Confirm the part number (often 56009339 or EP29/EP26 variants) to ensure correct replacement for your vehicle’s OE relay. Check the vehicle model year ranges supported by the relay, as some products target specific generations (for example Jeep TJ Wrangler 1997-2000). Consider LED-only versus mixed-LED compatibility, since some relays perform best with LED bulbs and others are universal.
Size and mounting space matter. Many listings call out dimensions like 1.2″ to 1.5″ in various dimensions; verify the relay physically fits in the dash or engine bay relay box. Plugs and sockets should match the vehicle’s harness (4-pin EP29 or EP26 configurations). If you upgrade to an LED-friendly relay, ensure the device preserves the standard flash rate for your country and vehicle, avoiding nuisance dash indicators or erroneous bulb failure warnings.
Reliability and warranty can influence long-term satisfaction. OE-replacement options tend to offer stable performance and familiar wiring. For those upgrading to LED LEDs, a plug-and-play design reduces installation risk. If a relay is sold in a multi-pack, such as Formiden’s EP26 pack, you gain value and a spare. Always follow safe installation practices and disconnect the battery before replacing a relay to prevent shorts or accidental shocks.