The APDTY 013414-Harness is a brand-new 4-wire pigtail wiring harness designed to repair or replace melted, corroded, or damaged radiator cooling fan speed control relay connectors on 1996-2004 Chrysler, Dodge, Jeep, and Plymouth vehicles. This direct-fit connector restores proper electrical connection to the fan relay, preventing overheating, erratic fan operation, and potential engine damage from inadequate cooling.
Key Takeaways
- Direct replacement 4-wire pigtail harness for radiator cooling fan control relay on select 1996-2004 Chrysler, Dodge, Jeep, and Plymouth models
- Replaces OE Mopar part numbers 4897034AA, 5013979AB, 5013979AA, and PS16 S949
- Critical: Test cooling fan amperage draw before installation to prevent repeat harness failure
- Compatible with 1996-2000 Chrysler Town & Country, 1996-2000 Dodge Caravan/Grand Caravan, 1999-2004 Jeep Grand Cherokee, 1997-1999 Dodge/Plymouth Neon, and 1996-2000 Plymouth Voyager/Grand Voyager
- Repairs common symptoms including no cooling fan operation, intermittent fan function, or melted relay connector
Buy APDTY APD-013414-Harness directly from APDTY
Buy APDTY APD-013414-Harness on Amazon
Buy APDTY APD-013414-Harness on eBay
What Does the Radiator Cooling Fan Relay Harness Do?
The radiator cooling fan relay harness is a 4-wire electrical connector that links the engine control module (ECM) or power distribution center to the radiator cooling fan relay. This relay controls when and at what speed the cooling fan operates. The harness carries both control signals and high-amperage power to activate the relay, which in turn switches power to the cooling fan motor.
When this harness fails—typically from heat damage, corrosion, or high current draw—the relay loses proper electrical contact. This can cause the cooling fan to stop working entirely, run continuously, or operate erratically, leading to engine overheating or poor air conditioning performance.
Critical component: This pigtail connector is essential for maintaining proper cooling system function. A failed harness can strand you with an overheated engine, especially in stop-and-go traffic or hot weather conditions.
What Are the Symptoms of a Bad Fan Relay Harness?
A failing or damaged cooling fan relay harness typically produces these warning signs:
- No cooling fan operation: Fan never turns on even when engine reaches operating temperature
- Intermittent fan function: Fan works sporadically or only at certain speeds
- Melted connector housing: Visible heat damage, melted plastic, or burnt wire insulation at the relay connector
- Engine overheating: Temperature gauge rises above normal, especially in traffic or at idle
- Air conditioning problems: A/C blows warm air because the condenser fan isn't running
- Blown fuses: Repeated cooling fan circuit fuse failure
- Burnt smell: Electrical burning odor from the relay area under the hood
- Poor electrical contact: Corroded, loose, or discolored terminals inside the connector
These symptoms often appear gradually as the harness deteriorates from heat cycling and electrical load. If you notice any combination of these signs, inspect the fan relay connector immediately.
Which Vehicles Does the APDTY 013414 Harness Fit?
The APDTY 013414-Harness is confirmed compatible with the following vehicles equipped with radiator cooling fan speed control relay systems:
| Make | Model | Years |
|---|---|---|
| Chrysler | Town & Country Van | 1996-2000 |
| Chrysler | Voyager / Grand Voyager | 2000 |
| Dodge | Caravan / Grand Caravan | 1996-2000 |
| Dodge | Neon | 1997-1999 |
| Jeep | Grand Cherokee | 1999-2004 |
| Plymouth | Voyager / Grand Voyager | 1996-2000 |
| Plymouth | Neon | 1997-1999 |
Important fitment note: Always match your specific vehicle to the live compatibility chart on APDTY.com before ordering. Engine size, cooling system configuration, and production date may affect fitment within these year ranges. The chart will confirm exact compatibility for your VIN.
APDTY 013414 Specifications and OE Cross-Reference
| APDTY Part Number: | 013414-Harness |
| Connector Type: | 4-Wire Pigtail |
| Application: | Radiator Cooling Fan Speed Control Relay |
| Condition: | Brand New |
| Replaces Mopar OE: | 4897034AA, 5013979AB, 5013979AA |
| Replaces Aftermarket: | PS16 S949 |
| Related Kit: | APDTY 013414 (Relay Kit with Wiring Harness) |
This harness is designed as a direct replacement for factory Mopar connectors that have suffered heat damage, melting, or terminal corrosion. The pigtail design allows you to repair the damaged section without replacing the entire vehicle wiring harness.
CRITICAL: Test Your Cooling Fan Before Installing This Harness
IMPORTANT INSTALLATION WARNING: Before installing the APDTY 013414 harness, you must test the amperage draw of your radiator cooling fan motor. This step is not optional—it determines whether your repair will be permanent or temporary.
Why this matters: A worn-out cooling fan motor can still spin and appear to work normally, but internally deteriorated bearings or windings force it to draw excessive amperage. This extra current overheats the relay and melts the wiring harness connector. If you install this new harness with a failing fan motor, you will likely burn out the new connector within days or weeks.
How to test fan amperage:
- Use a clamp-style DC ammeter on the fan motor's positive power wire
- Run the fan at both low and high speed (if applicable)
- Compare measured amperage to the vehicle's cooling fan specifications (typically 15-25 amps for these vehicles at normal operation)
- If amperage exceeds specifications by 20% or more, replace the cooling fan motor before installing the new harness
This diagnostic step will save you time, money, and frustration. Address the root cause of harness failure—not just the symptom.
General Installation Overview for Fan Relay Harness Repair
While specific procedures vary by vehicle model, fan relay harness replacement typically follows this general process:
- Disconnect battery: Remove the negative battery terminal and wait 5 minutes before working on electrical components
- Locate the fan relay: Usually found in the power distribution center (PDC) under the hood, driver's side fender area
- Remove damaged harness: Unplug the melted or corroded connector from the relay; inspect relay for damage (replace if contacts are burnt)
- Prepare wire connections: Strip back damaged wire insulation to expose clean copper; cut wires square
- Install new pigtail: Connect new harness wires to vehicle wiring using appropriate crimp connectors or solder joints; apply heat-shrink tubing for insulation
- Secure routing: Position harness away from hot engine components and moving parts; use zip ties to prevent chafing
- Reconnect battery and test: Start engine, let it warm to operating temperature, and verify cooling fan activates at proper temperature threshold
- Monitor operation: Check connector for heat buildup during first few drive cycles
Safety notes: Work only on a cool engine. Use proper crimping tools for automotive-grade connections. Apply dielectric grease to terminals to prevent future corrosion. If you lack electrical repair experience, consult a qualified technician.
Related repair: If your relay is also damaged, consider APDTY part 013414 (without the "-Harness" suffix), which includes both the relay and pigtail harness as a complete repair kit.
Frequently asked questions
Can I use this harness if my cooling fan relay is also damaged?
Yes, but you'll need to purchase a replacement relay separately, or consider APDTY part 013414 (without "-Harness"), which includes both the relay and wiring harness as a complete kit. Always inspect the relay for burnt contacts or damage when the harness has melted.
Why does my fan relay harness keep melting even after replacement?
Repeated harness melting indicates excessive amperage draw, typically caused by a failing cooling fan motor with worn bearings or degraded windings. The motor may still spin but requires more current than normal, overheating the relay and connector. Test fan amperage and replace the motor if it exceeds specifications before installing a new harness.
Will this harness work on all trim levels of the listed vehicles?
Fitment depends on your vehicle's specific cooling system configuration. Always verify compatibility using the live fitment chart on APDTY.com by entering your VIN or exact vehicle details. Engine size and cooling system options can affect whether this 4-wire relay harness is the correct application.
Do I need special tools to install this pigtail harness?
You'll need basic hand tools (wrenches, wire strippers, crimpers or soldering iron), heat-shrink tubing or electrical tape, and automotive-grade crimp connectors or solder. A multimeter or clamp ammeter is strongly recommended to test fan current draw before installation. Dielectric grease for connector terminals is also advisable.
The APDTY 013414-Harness provides a direct, cost-effective solution for repairing melted or damaged radiator cooling fan relay connectors on 1996-2004 Chrysler, Dodge, Jeep, and Plymouth vehicles. This 4-wire pigtail harness restores proper electrical connection, preventing engine overheating and cooling system failure. However, long-term repair success depends on addressing the root cause: always test your cooling fan's amperage draw before installation to ensure you're not masking a failing fan motor that will simply destroy the new harness. Verify exact fitment for your vehicle using the compatibility chart on APDTY.com, and follow proper electrical repair procedures for a reliable, lasting fix. Restore your cooling system's reliability and protect your engine with this essential repair component.
Order APDTY APD-013414-Harness from APDTY