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Dorman 645-509 HVAC Blower Motor Resistor Connector
| Brand | Dorman 645-509 |
|---|---|
| Overall Length (In) | 15.75 in |
| Package Contents | 4-Wire Harness |
| Terminal Gender | Female |
| Terminal Material | Phosphor Bronze (Tin Plate) |
| Terminal Type | Blade |
| Wire Gauge Measurement | 16 |
| Wire Quantity | 4 |
| Fits | Chevrolet, GMC, and Oldsmobile · 46 vehicles |
OE replacement connector. Replaces a damaged original equipment connector.
Corrosion-resistant terminals. Helps maintain reliable electrical performance.
4-wire harness. Features blade-style female terminals for a secure connection.
Cross-references Standard Ignition S-1615, 1P1499 and 867 for the same application. See all 7.
Dorman 645-509 HVAC Blower Motor Resistor Connector
Restore a damaged blower motor resistor connection with the Dorman 645-509 HVAC blower motor resistor connector. This 4-wire harness is built with corrosion-resistant terminals to help maintain a stable electrical connection in heating and air conditioning systems.
Compatible with select Chevrolet Blazer, Chevrolet S10, GMC Sonoma, GMC Jimmy, and Oldsmobile Bravada applications, this connector is a direct-fit electrical repair solution for common HVAC blower circuit issues.
Key Features
- Replacement HVAC blower motor resistor connector for damaged OE connectors
- Corrosion-resistant phosphor bronze terminals with tin plating
- Female blade terminals for secure electrical contact
- 16-gauge wire construction for HVAC blower motor resistor circuits
- 15.75-inch overall harness length for repair routing
- Fits select 1994-2005 Chevrolet, GMC, and Oldsmobile applications
Detailed Description
The Dorman 645-509 is designed for vehicles where the original blower motor resistor connector has been affected by heat, corrosion, or terminal wear. It uses a 4-wire harness layout with female blade terminals and corrosion-resistant phosphor bronze terminals to help restore reliable blower motor resistor operation. This part is a practical repair choice for owners servicing a Chevrolet S10, GMC Sonoma, or related platform vehicle with HVAC electrical connector damage.
This part cross-references Standard Ignition S-1615 for the same application. The Dorman 645-509 also cross-references 1P1499 for select applications.
What It Helps Fix
- Blower fan stops working at certain speed settings
- Intermittent HVAC blower motor operation
- Heat-damaged or melted resistor connector terminals
- Corrosion at the blower motor resistor plug
- Poor electrical contact in the HVAC blower circuit
Installation Notes and Tips
Inspect the blower motor resistor and surrounding connector area before installation. If the resistor or adjacent wiring shows heat damage, replace the affected components together to avoid repeat failure. Verify wire routing and terminal engagement during installation to ensure a secure connection.
Quality Assurance
Dorman designs replacement electrical connectors to address common OE connector failure points, including corrosion and overheating. The 645-509 uses corrosion-resistant terminals and OE-style construction for dependable service in HVAC blower motor resistor repairs.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Chevrolet | Blazer | N/A | — |
| 2004 | Chevrolet | Blazer | N/A | — |
| 2004 | Chevrolet | S10 | N/A | — |
| 2004 | GMC | Sonoma | N/A | — |
| 2003 | Chevrolet | Blazer | N/A | — |
| 2003 | Chevrolet | S10 | N/A | — |
| 2003 | GMC | Sonoma | N/A | — |
| 2002 | Chevrolet | Blazer | N/A | — |
| 2002 | Chevrolet | S10 | N/A | — |
| 2002 | GMC | Sonoma | N/A | — |
| 2001 | Chevrolet | Blazer | N/A | — |
| 2001 | Chevrolet | S10 | N/A | — |
| 2001 | GMC | Jimmy | N/A | — |
| 2001 | GMC | Sonoma | N/A | — |
| 2001 | Oldsmobile | Bravada | N/A | — |
| 2000 | Chevrolet | Blazer | N/A | — |
| 2000 | Chevrolet | S10 | N/A | — |
| 2000 | GMC | Jimmy | N/A | — |
| 2000 | GMC | Sonoma | N/A | — |
| 2000 | Oldsmobile | Bravada | N/A | — |
| 1999 | Chevrolet | Blazer | N/A | — |
| 1999 | Chevrolet | S10 | N/A | — |
| 1999 | GMC | Jimmy | N/A | — |
| 1999 | GMC | Sonoma | N/A | — |
| 1999 | Oldsmobile | Bravada | N/A | — |
| 1998 | Chevrolet | Blazer | N/A | — |
| 1998 | Chevrolet | S10 | N/A | — |
| 1998 | GMC | Jimmy | N/A | — |
| 1998 | GMC | Sonoma | N/A | — |
| 1998 | Oldsmobile | Bravada | N/A | — |
| 1997 | Chevrolet | Blazer | N/A | — |
| 1997 | Chevrolet | S10 | N/A | — |
| 1997 | GMC | Jimmy | N/A | — |
| 1997 | GMC | Sonoma | N/A | — |
| 1997 | Oldsmobile | Bravada | N/A | — |
| 1996 | Chevrolet | Blazer | N/A | — |
| 1996 | Chevrolet | S10 | N/A | — |
| 1996 | GMC | Jimmy | N/A | — |
| 1996 | GMC | Sonoma | N/A | — |
| 1996 | Oldsmobile | Bravada | N/A | — |
| 1995 | Chevrolet | Blazer | N/A | — |
| 1995 | Chevrolet | S10 | N/A | — |
| 1995 | GMC | Jimmy | N/A | — |
| 1995 | GMC | Sonoma | N/A | — |
| 1994 | Chevrolet | S10 | N/A | — |
| 1994 | GMC | Sonoma | N/A | — |
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