Genuine OEM G4R-H24 Type 12V JASO Plug-in SPST Relay, 25A (120A Inrush), Compatible with JASO 1a Sockets for Headlamp, Blower, Defogger, Horn & A/C Clutch Circuits

G4R-H24 Automotive Relay — JASO Plug-In, SPST (1a)Type: SPST-NO (1a) plug-in automotive relay (JASO form factor).Ratings: 25 A carry / switching with up to 120 A inrush (family spec).Coil: 12 V DC for this variant; G4R family also includes 24 V options.Use Cases: Headlamp, blower fan, defogger, horn, A/C magnetic clutch.Where It Fits: Compatible with JASO plug-in relay sockets in under-hood or under-dash fuse/relay boxes; verify socket standard and pin layout.Install Tips: Match coil voltage, contact form (1a), and current rating to your circuit; compare the base/footprint to your original relay before installation.What’s Included: 1× G4R-H24 relay.References: Omron Automotive Relay Series selection data for G4R (JASO, 1a, 25 A, 120 A inrush; 12 V/24 V family) and recommended applications for headlamp, blower, defogger, horn, and A/C clutch.

• Specs & OE/PN cross-refs: SPST-NO (1a) automotive relay; 12 V coil; 25 A carry with up to 120 A inrush (family spec) for lighting and motor loads. JASO plug-in footprint (4-pin, 1a). Compatible with G4R-H24 type/JASO 1a sockets used in transportation fuse/relay panels. Match coil voltage, contact form (1a), footprint and rating with the old unit before replacement.
• Operation & install locations: Fits relay bases in under-hood or under-dash fuse/relay boxes that use JASO 1a plug-in positions. Compatible with headlamp relay bay, blower/defogger positions, horn relay seat, and A/C magnetic-clutch relay locations. Confirm seat style (JASO vs ISO mini/micro), pin layout and wiring before installing; push fully into the socket until locked.
• Compatibility — lighting circuits: Compatible with 12 V JASO-socket headlamp feed/control relay positions in passenger cars and light trucks that specify a JASO 1a plug-in relay. Supports lamp inrush typical of halogen/LED control (within rating). Verify your base is JASO plug-in and that the circuit requires SPST-NO (1a); compare terminal map to the removed relay.
• Compatibility — HVAC/blower/defogger circuits: Compatible with blower-motor and rear defogger relay sockets using JASO 1a plug-in relays in 12 V systems. Sized for transportation use with resistive/inductive loads. Check the box legend or service manual for relay seat label; match coil voltage and 25 A contact rating to avoid overheating or premature contact wear.
• Compatibility — horn & A/C clutch circuits: Compatible with horn relay sockets and A/C magnetic-clutch relay seats that call for a JASO 1a SPST relay. Family inrush capability helps manage inductive spikes; ensure proper fuse protection upstream. Do not substitute for latching or change-over (SPDT) types; this part is single-throw, normally-open
• Complementary items (to complete installs): Compatible with JASO 4-terminal relay sockets/pigtails, fuse taps, and weatherproof holders for new wiring or relocations. For other circuits that use different footprints, consider ISO mini/micro relays matched to their specific bases (not included). Pair with correct fuses, terminals and mounting brackets to restore circuit integrity.