Home› HVAC > Relays› Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) RelayOE Quality 60-Day Returns
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 1
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 2
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 3
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 4
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 5
Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay - view 6
Part #: RY-85

Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay

⚙️ 289 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$21.79Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Oldsmobile, Chevrolet, GMC, Pontiac, Buick, and Cadillac, Custom Cruiser, Cutlass Ciera, Corvette, S10, S10 Blazer, S15, S15 Jimmy, Cutlass Supreme, Firebird, Camaro, Caprice, 98, Cutlass, Delta 88, Regal, Skyhawk, Skylark, Somerset, Calais, Cutlass Salon, Firenza, Toronado, Grand Am, Century, Electra, LeSabre, Riviera, Somerset Regal, DeVille, Fleetwood, Cavalier, Celebrity, Chevette, Citation II, El Camino, Impala, Monte Carlo, Caballero, 6000, Bonneville, Grand Prix, Parisienne, Cutlass Calais, Estate Wagon, Malibu, Cutlass Cruiser, and Grand LeMans
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all HVAC Automatic Temperature Control (ATC) Relay options

Reliable HVAC Automatic Temperature Control Relay for GM Vehicles

The Standard Ignition RY-85 HVAC Automatic Temperature Control (ATC) Relay is designed to provide dependable operation for your vehicle's climate control system. Engineered for select Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac models, this relay ensures consistent performance in regulating headlamp motor functions and temperature control.

  • 20 amp amperage rating for stable electrical flow
  • Single female square connector for secure connection
  • Four male blade terminals for reliable contact
  • 12-volt operation compatible with standard automotive electrical systems
  • Designed specifically for HVAC automatic temperature control and headlamp motor relay functions

Product Details and Specifications

The Standard Ignition RY-85 relay features a 20 amp rating suitable for handling the electrical load of HVAC systems in various GM vehicles. It includes one female square connector and four male blade terminals, ensuring a firm and precise fit within the vehicle's wiring harness. The relay operates at 12 volts, matching the standard automotive electrical system voltage. This relay does not include mounting brackets, so installation requires securing it within the existing relay panel or bracket in your vehicle.

Compatible Vehicles and Applications

This HVAC Automatic Temperature Control relay is compatible with a wide range of General Motors vehicles, including Buick models like Century and LeSabre, Cadillac DeVille, Chevrolet Camaro and Caprice, GMC S10 and S15, Oldsmobile Cutlass and Delta 88, and Pontiac Firebird and Grand Prix. It is suitable for models such as the Chevrolet Corvette, Cavalier, and Malibu, as well as the Pontiac Bonneville and Grand Am. The RY-85 relay supports HVAC and headlamp motor relay functions in these vehicles, ensuring proper climate control and lighting operation.

  • Resolves HVAC system temperature control failures
  • Addresses intermittent or non-functioning headlamp motor relay issues
  • Prevents electrical overloads with a 20 amp rating
  • Eliminates relay-related HVAC blower or fan malfunctions
  • Restores proper relay operation in compatible Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac models

Installation Notes and Tips

When installing the Standard Ignition RY-85 relay, ensure the vehicle's ignition is off and the battery is disconnected to prevent electrical shorts. Verify the relay's connector and terminal types match the vehicle's wiring harness. Since mounting brackets are not included, use the existing relay mounting location or secure the relay firmly to avoid vibration damage. Confirm proper orientation of the square female connector and blade terminals for a secure fit.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. The RY-85 relay undergoes rigorous testing to ensure consistent electrical operation under normal driving conditions. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in material and workmanship to support long-term vehicle functionality.

BrandStandard Ignition
Part NumberRY-85
Amperage Rating20 A
Connector GenderFemale
Connector ShapeSquare
ContentsRelay
FunctionsHeadlamp Motor Relay
Mounting Bracket(s) IncludedNo
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 289 vehicles. Search below:

YearMakeModelBody TypeDrive TypeLitersCylindersFuel TypePositionNotes
1992OldsmobileCustom CruiserN/A
1992OldsmobileCutlass CieraN/A
1991OldsmobileCustom CruiserN/A
1991OldsmobileCutlass CieraN/A
1990ChevroletCorvetteN/A
1990OldsmobileCustom CruiserN/A
1989OldsmobileCustom CruiserN/A
1988ChevroletCorvetteN/A
1988ChevroletS104.3LV6N/A
1988ChevroletS10 Blazer4.3LV6N/Aw/ Rally Gauge Package; OE No. 10039961
1988ChevroletS10 Blazer2.8LV6N/Aw/ Rally Gauge Package; OE No. 10039961
1988GMCS154.3LV6N/Aw/ Rally Gauge Package
1988GMCS152.8LV6N/Aw/ Rally Gauge Package
1988GMCS15 Jimmy4.3LV6N/Aw/ Rally Gauge Package
1988GMCS15 Jimmy2.8LV6N/Aw/ Rally Gauge Package
1988OldsmobileCustom CruiserN/A4 Term.
1988OldsmobileCutlass SupremeN/A4 Term.
1988PontiacFirebirdN/A
1987ChevroletCamaroN/A
1987ChevroletCapriceN/A
1987ChevroletS10 Blazer2.8LV6N/Aw/ Rally Gauge Package; OE No. 10039961
1987GMCS152.8LV6N/Aw/ Rally Gauge Package
1987GMCS15 Jimmy2.8LV6N/Aw/ Rally Gauge Package
1987Oldsmobile98N/A
1987OldsmobileCustom CruiserN/Aw/ Plastic Housing
1987OldsmobileCustom CruiserN/A
1987OldsmobileCutlassN/AFitment: Excludes vehicles with automatic temperature control.
1987OldsmobileCutlassN/A4 Term.
1987OldsmobileCutlass5.0LV8N/A
1987OldsmobileCutlass SupremeN/AFitment: Excludes vehicles with automatic temperature control.
1987OldsmobileCutlass SupremeN/A4 Term.
1987OldsmobileDelta 88N/ASquare shape engine crankcase breather element.
1987OldsmobileDelta 88FWDN/A
1987PontiacFirebirdN/A
1986BuickRegal3.8LV6N/A
1986BuickRegal5.0LV8N/A
1986BuickSkyhawk2.0LL4N/A
1986BuickSkylarkN/A
1986BuickSkylark2.5LL4N/A
1986BuickSkylark3.0LV6N/A
1986ChevroletCamaroN/A
1986ChevroletS10 Blazer2.8LV6N/Aw/ Rally Gauge Package; OE No. 10039961
1986GMCS152.8LV6N/Aw/ Rally Gauge Package
1986GMCS15 Jimmy2.8LV6N/Aw/ Rally Gauge Package
1986Oldsmobile98N/A4 Term.
1986Oldsmobile98N/A
1986OldsmobileCalaisN/A
1986OldsmobileCustom CruiserN/Aw/ Plastic Housing
1986OldsmobileCustom CruiserN/A
1986OldsmobileCutlassN/AFitment: Excludes vehicles with automatic temperature control.
1986OldsmobileCutlass5.0LV8N/A
1986OldsmobileCutlass CieraN/A
1986OldsmobileCutlass SalonN/AFitment: Excludes vehicles with automatic temperature control.
1986OldsmobileCutlass SupremeN/AFitment: Excludes vehicles with automatic temperature control.
1986OldsmobileDelta 88N/ASquare shape engine crankcase breather element.
1986OldsmobileDelta 88N/A
1986OldsmobileDelta 88FWDN/A
1986OldsmobileFirenzaN/A
1986OldsmobileToronadoN/A4 Blade Term.
1986PontiacFirebirdN/A
1986PontiacGrand Am2.5LL4N/AOE No. 10039961
1986PontiacGrand Am3.0LV6N/AOE No. 10039961
1985BuickCenturyN/A
1985BuickLeSabreN/A
1985BuickLeSabreCoupeN/A
1985BuickLeSabreSedanN/A
1985BuickRegalN/A
1985BuickRivieraN/A
1985BuickRiviera3.8LV6N/A
1985BuickRiviera5.0LV8N/A
1985BuickRiviera5.7LV8N/A
1985BuickSkylarkN/A
1985BuickSkylark2.5LL4N/A
1985BuickSkylark2.8LV6N/A
1985CadillacDeVille4.1LV8N/A
1985CadillacDeVille4.3LV6N/A
1985CadillacFleetwood4.3LV6N/A
1985ChevroletCamaroN/A
1985ChevroletCapriceN/A
1985ChevroletCavalierN/A
1985ChevroletCelebrity4.3LV6N/A
1985ChevroletCelebrityN/A
1985ChevroletChevetteN/A
1985ChevroletCitation IIN/ASquare Relay
1985ChevroletCorvetteN/A4 Blade Term.
1985ChevroletCorvetteN/A
1985ChevroletEl CaminoN/A
1985ChevroletImpalaN/A
1985ChevroletMonte CarloN/A
1985Oldsmobile983.0LV6N/A
1985Oldsmobile984.3LV6N/A
1985Oldsmobile983.0LV6N/AOE No.10022960, 10039961
1985Oldsmobile983.8LV6N/AOE No.10022960, 10039961
1985Oldsmobile984.3LV6N/AOE No.10022960, 10039961
1985Oldsmobile98N/A
1985OldsmobileCalaisN/A
1985OldsmobileCustom CruiserN/A
1985OldsmobileCustom CruiserN/A4 Term.
1985OldsmobileCutlassN/AFitment: Excludes vehicles with automatic temperature control.
1985OldsmobileCutlassN/A
1985OldsmobileCutlass Ciera4.3LV6DIESELN/A
1985OldsmobileCutlass CieraN/A
1985OldsmobileCutlass Ciera3.0LV6N/AOE No.10022960, 10039961
1985OldsmobileCutlass Ciera4.3LV6N/AOE No.10022960, 10039961
1985OldsmobileCutlass SalonN/AFitment: Excludes vehicles with automatic temperature control.
1985OldsmobileCutlass SupremeN/AFitment: Excludes vehicles with automatic temperature control.
1985OldsmobileDelta 885.7LV8N/A
1985OldsmobileDelta 88N/ASquare Relay
1985OldsmobileDelta 88SedanN/A
1985OldsmobileDelta 88N/A
1985OldsmobileDelta 883.8LV6N/A
1985OldsmobileDelta 885.0LV8N/A
1985OldsmobileFirenzaN/A
1985OldsmobileToronadoN/A
1985Pontiac60002.5LL4N/AOE No.10022960
1985Pontiac60002.8LV6N/AOE No.10022960
1985Pontiac60004.3LV6N/AOE No.10022960
1985Pontiac6000N/A
1985PontiacBonnevilleN/A
1985PontiacBonnevilleN/ARectangular Relay
1985PontiacFirebirdN/ASilver
1985PontiacGrand AmN/A
1985PontiacGrand PrixN/A
1985PontiacParisienneN/A
1985PontiacParisienne3.8LV6N/AOE No.10022960
1985PontiacParisienne4.3LV6N/AOE No.10022960
1985PontiacParisienne5.0LV8N/AOE No.10022960
1985PontiacParisienne5.7LV8N/AOE No.10022960
1984BuickCentury4.3LV6DIESELN/A
1984BuickCenturyN/A
1984BuickCentury3.0LV6N/A4 Blade Term.
1984BuickCentury4.3LV6N/A4 Blade Term.
1984BuickLeSabreN/A
1984BuickRegalN/A
1984BuickRegal3.8LV6N/A
1984BuickRegal4.1LV6N/A
1984BuickRegal4.3LV6N/A
1984BuickRegal5.0LV8N/A
1984BuickRivieraN/A
1984BuickRiviera5.7LV8N/A
1984BuickRiviera5.0LV8N/A
1984CadillacDeVille5.7LV8N/A
1984CadillacDeVille4.1LV8N/A
1984ChevroletCaprice5.7LV8DIESELN/A
1984ChevroletCapriceN/A
1984ChevroletCavalierN/A
1984ChevroletCelebrity2.8LV6N/A
1984ChevroletCelebrity4.3LV6N/A
1984ChevroletCelebrityN/A
1984ChevroletChevetteN/A
1984ChevroletCitation IIN/A4 Term.
1984ChevroletCorvetteN/A4 Blade Term.
1984ChevroletCorvetteN/A
1984ChevroletEl Camino5.7LV8N/A
1984ChevroletEl CaminoN/A4 Blade Term.
1984ChevroletEl CaminoN/A
1984ChevroletImpalaN/A
1984ChevroletMonte CarloN/A
1984ChevroletMonte CarloN/A4 Blade Term.
1984Oldsmobile985.7LV8DIESELN/A
1984Oldsmobile98N/A
1984OldsmobileCustom CruiserN/A4 Term.
1984OldsmobileCustom Cruiser5.7LV8DIESELN/A
1984OldsmobileCutlass Calais5.7LV8DIESELN/A
1984OldsmobileCutlass CalaisN/A
1984OldsmobileCutlass Ciera4.3LV6DIESELN/A
1984OldsmobileCutlass Ciera3.0LV6N/AOE No.10022960, 10039961
1984OldsmobileCutlass Ciera4.3LV6N/AOE No.10022960, 10039961
1984OldsmobileCutlass CieraN/AAutomatic temperature control is needed for proper installation.
1984OldsmobileCutlass Ciera4.3LV6DIESELN/ACompatible with vehicles equipped with High Altitude Emissions.
1984OldsmobileCutlass SupremeN/A
1984OldsmobileDelta 885.7LV8DIESELN/A
1984OldsmobileDelta 88SedanN/A
1984OldsmobileDelta 88N/A
1984OldsmobileFirenzaN/AAutomatic temperature control is needed for proper installation.
1984OldsmobileFirenzaN/A
1984OldsmobileToronado5.7LV8DIESELN/A
1984OldsmobileToronadoN/A
1984Pontiac60004.3LV6DIESELN/Aw/ High Altitude Emissions; w/ Federal Emissions
1984Pontiac6000N/AAutomatic temperature control is needed for proper installation.
1984Pontiac6000N/A
1984Pontiac60004.3LV6N/AOE No.10022960
1984PontiacBonnevilleN/A
1984PontiacGrand PrixN/A
1984PontiacGrand Prix5.7LV8DIESELN/Aw/ High Altitude Emissions; w/ Federal Emissions
1984PontiacParisienneN/A
1983BuickCentury2.5LL4N/A
1983BuickCentury2.8LV6N/A
1983BuickCentury3.0LV6N/A
1983BuickCentury4.3LV6N/A
1983BuickCentury3.0LV6N/A4 Blade Term.
1983BuickCentury4.3LV6N/A4 Blade Term.
1983BuickLeSabreN/A
1983BuickRegalN/A
1983BuickRivieraN/A
1983BuickRiviera3.8LV6N/A
1983ChevroletCapriceN/A
1983ChevroletCaprice3.8LV6N/A
1983ChevroletCaprice5.0LV8N/A
1983ChevroletCaprice5.7LV8N/A
1983ChevroletCelebrityN/A
1983ChevroletEl CaminoN/A4 Blade Term.
1983ChevroletEl Camino3.8LV6N/A
1983ChevroletEl Camino5.0LV8N/A
1983ChevroletEl Camino5.7LV8N/A
1983ChevroletImpalaN/A
1983ChevroletImpala3.8LV6N/A
1983ChevroletImpala5.0LV8N/A
1983ChevroletImpala5.7LV8N/A
1983ChevroletMalibuN/A
1983ChevroletMalibu3.8LV6N/A
1983ChevroletMalibu5.0LV8N/A
1983ChevroletMalibu4.3LV6N/A
1983ChevroletMalibu5.7LV8N/A
1983ChevroletMonte CarloN/A
1983ChevroletMonte Carlo3.8LV6N/A
1983ChevroletMonte Carlo5.0LV8N/A
1983ChevroletMonte Carlo4.3LV6N/A
1983ChevroletMonte Carlo5.7LV8N/A
1983Oldsmobile98N/A
1983Oldsmobile985.7LV8N/A
1983OldsmobileCustom CruiserN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileCutlass CalaisN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileCutlass CieraN/Aw/o Bracket; OE No. 10022960
1983OldsmobileCutlass CieraN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileCutlass Ciera4.3LV6N/A
1983OldsmobileCutlass CruiserN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileCutlass SupremeN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileDelta 88SedanN/A
1983OldsmobileDelta 88N/A
1983OldsmobileFirenzaN/AAutomatic temperature control is needed for proper installation.
1983OldsmobileToronadoN/A
1983Pontiac6000N/A4 Term.
1983Pontiac6000N/AAutomatic temperature control is needed for proper installation.
1983Pontiac60004.3LV6N/A
1983PontiacBonnevilleN/A
1983PontiacGrand LeMansN/A
1983PontiacGrand PrixN/A
1983PontiacParisienneN/A
1982BuickCentury3.0LV6N/A
1982BuickCentury2.5LL4N/A
1982BuickCentury2.8LV6N/A
1982BuickCentury4.3LV6N/A
1982BuickCenturyN/A5-blade terminal for automatic transmission spark control relay.
1982BuickLeSabreN/A
1982BuickRegalN/A
1982BuickRivieraN/A
1982ChevroletCapriceN/A
1982ChevroletCelebrityN/A
1982ChevroletEl CaminoN/A4 Blade Term.
1982ChevroletEl Camino3.8LV6N/A
1982ChevroletEl Camino4.4LV8N/A
1982ChevroletEl Camino5.0LV8N/A
1982ChevroletImpalaN/A
1982ChevroletMalibuN/A
1982ChevroletMonte CarloN/A
1982ChevroletMonte Carlo3.8LV6N/A
1982ChevroletMonte Carlo4.4LV8N/A
1982ChevroletMonte Carlo5.0LV8N/A
1982ChevroletMonte Carlo4.3LV6N/A
1982ChevroletMonte Carlo5.7LV8N/A
1982Oldsmobile98N/A
1982Oldsmobile985.7LV8N/A
1982OldsmobileCustom CruiserN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileCutlass Calais3.8LV6N/A
1982OldsmobileCutlass CalaisN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileCutlass CieraN/Aw/o Bracket; OE No. 10022960
1982OldsmobileCutlass CieraN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileCutlass Ciera3.0LV6N/ABy Right Shock Tower
1982OldsmobileCutlass Ciera4.3LV6N/A
1982OldsmobileCutlass CruiserN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileCutlass SupremeN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileDelta 88SedanN/A
1982OldsmobileDelta 883.8LV6N/A
1982OldsmobileDelta 884.3LV8N/A
1982OldsmobileDelta 884.4LV8N/A
1982OldsmobileDelta 885.0LV8N/A
1982OldsmobileDelta 885.7LV8N/A
1982OldsmobileFirenzaN/AAutomatic temperature control is needed for proper installation.
1982OldsmobileToronadoN/A
1982Pontiac6000N/AAutomatic temperature control is needed for proper installation.
1982Pontiac6000N/A
1982Pontiac60004.3LV6N/A
1982PontiacBonnevilleN/A
1982PontiacGrand LeMansN/A
1982PontiacGrand PrixN/A
1982PontiacParisienneN/A
1981Oldsmobile985.7LV8N/A
1980Oldsmobile985.7LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1002095010039961198711R12573591556-1721AR212AR220MT0525R675RAA1857

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.