OE Quality
60-Day Returns

Standard Ignition RY-126 A/C Compressor Cut-Out Relay
Reliable A/C Compressor Cut-Off Relay for Dodge Shadow and Plymouth Sundance
The Standard Ignition RY-126 A/C compressor cut-off relay is designed specifically for HVAC systems in Dodge Shadow and Plymouth Sundance models. This relay ensures proper control of the A/C compressor, contributing to efficient climate control and engine starting functions.
- Connector Gender: Female with 1 rectangular connector
- Terminal Type: 4 male blade terminals for secure electrical connections
- Voltage: 12V operation suitable for standard automotive electrical systems
- Includes mounting bracket(s) for easy installation
- Functions as a starter relay and A/C compressor cut-off
- Continuous duty: No, designed for intermittent operation
Product Details and Specifications
The Standard Ignition RY-126 relay features a female rectangular connector with a single connection point, paired with four male blade terminals to ensure reliable electrical contact. Operating at 12 volts, this relay is engineered for use in HVAC systems of Dodge Shadow and Plymouth Sundance vehicles. The included mounting bracket simplifies installation and secures the relay in place. While not rated for continuous duty, it is optimized for starter and compressor cut-off functions, preventing unnecessary compressor engagement during engine start-up.
Compatible Vehicles and Applications
This A/C compressor cut-off relay is compatible with the following vehicles:
- Dodge Shadow
- Plymouth Sundance
It is designed to replace the original relay responsible for controlling the A/C compressor clutch and starter functions, ensuring proper HVAC operation and engine starting performance.
Common Issues Addressed by This Relay
- Prevents A/C compressor engagement during engine start to reduce load
- Resolves intermittent A/C compressor clutch failures
- Eliminates starter relay malfunctions affecting engine start
- Addresses relay connection issues due to worn terminals or connectors
- Helps maintain proper HVAC system cycling and compressor control
Installation Notes and Tips
Installation of the Standard Ignition RY-126 relay requires locating the existing A/C compressor cut-off relay in the HVAC relay panel of Dodge Shadow or Plymouth Sundance models. The included mounting bracket should be used to secure the relay firmly. Ensure the female rectangular connector and male blade terminals are properly aligned and fully seated to avoid electrical faults. Disconnect the battery before installation to prevent electrical shorts.
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM specifications. The RY-126 relay undergoes rigorous testing to ensure reliable performance in HVAC and starter applications. While continuous duty operation is not recommended, this relay is built for durability under normal vehicle operating conditions. Warranty coverage details should be confirmed with the parts provider.
| Brand | Standard Ignition |
|---|---|
| Part Number | RY-126 |
| Connector Gender | Female |
| Connector Shape | Rectangular |
| Contents | Relay |
| Continuous Duty | No |
| Functions | Starter |
| Mounting Bracket(s) Included | Yes |
| Terminal Gender | Male |
| Terminal Type | Blade |
| Voltage | 12 |
This part fits 7 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1988 | Dodge | Shadow | N/A | A/C Clutch Control |
| 1988 | Dodge | Shadow | N/A | |
| 1988 | Plymouth | Sundance | N/A | A/C Clutch Control |
| 1987 | Dodge | Shadow | N/A | A/C Clutch Control |
| 1987 | Dodge | Shadow | N/A | |
| 1987 | Plymouth | Sundance | N/A | A/C Clutch Control |
| 1987 | Plymouth | Sundance | N/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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.