8 Electrical connector parts are listed for the 1981 Checker Marathon, in 5 part types, covering all 4 engine options (3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 and 5.7L 350cid V8 DIESEL). Each one has a brand, a manufacturer part number and notes that say where it fits.
The connector system on the 1981 Checker Marathon supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. The largest groups are Carburetor Choke Thermostat / Heater Connector (3 parts), Voltage Regulator Connector (2 parts) and Ignition Coil Connector (1 part). The other 2 part types cover the remaining 2 parts.
The 1981 Checker Marathon was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
5 brands supply electrical connector parts for the 1981 Checker Marathon, led by STANDARD MOTOR PRODUCTS (4 parts), UNITED MOTOR PRODUCTS (1 part) and FAMOUS BRAND (1 part), plus 2 more brands.
Each part number listed for the 1981 Checker Marathon opens a page with every vehicle that part fits.
Carburetor Choke Thermostat / Heater Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 4.4L 267cid V8, 5.0L 305cid V8 | HP3890 | 🇺🇸 US 🇨🇦 CA | Handypack | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 4.4L 267cid V8, 5.0L 305cid V8 | S582 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: 4.4L 267cid V8, 5.0L 305cid V8 | CON93 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the harness connectors at the Carburetor Choke Thermostat / Heater. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 Carburetor Choke Thermostat / Heater Connector parts for the 1981 Checker Marathon come from 2 brands — STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS.
Listed part numbers: STANDARD MOTOR PRODUCTS HP3890, STANDARD MOTOR PRODUCTS S582 and UNITED MOTOR PRODUCTS CON93.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 | ICK100 | 🇺🇸 US 🇨🇦 CA | Repair KitWiring Harness | View on Amazon |
This table covers the harness connectors at the Ignition Coil. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS ICK100.
Oxygen (O2) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 | S915 | 🇺🇸 US 🇨🇦 CA | Upstream SensorColor Code Black and Green | View on Amazon |
This table covers the harness connectors at the Oxygen (O2) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S915.
Voltage Regulator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND Fits: 3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 | PTA1165 | 🇺🇸 US 🇨🇦 CA | Harness | View on Amazon |
| WELLS Fits: 3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 | 1P1241 | 🇺🇸 US 🇨🇦 CA | Harness | View on Amazon |
This table covers the harness connectors at the Voltage Regulator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Voltage Regulator Connector parts are listed for the 1981 Checker Marathon, from FAMOUS BRAND and WELLS.
This group includes FAMOUS BRAND PTA1165 and WELLS 1P1241.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Fits: 3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 | 399002 | 🇺🇸 US 🇨🇦 CA | AccessoryUniversal Switch for Washer Pump System | View on Amazon |
This table covers the harness connectors at the Washer Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: WAI GLOBAL 399002.
Buying Electrical Connector Parts for a 1981 Checker Marathon
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Every electrical connector part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Carburetor Choke Thermostat / Heater Connector and Voltage Regulator Connector .
Frequently Asked Questions
How many electrical connector parts fit the 1981 Checker Marathon?
Our catalog currently lists 8 electrical connector parts for the 1981 Checker Marathon across 5 subcategories and 5 brands, covering all 4 engine options (3.8L 229cid V6, 4.4L 267cid V8, 5.0L 305cid V8 and 5.7L 350cid V8 DIESEL). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 1981 Checker Marathon engines?
Yes. Every electrical connector part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 1981 Checker Marathon?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1981 Checker Marathon was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1981 Checker Marathon?
First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1981 Checker Marathon
Electrical Connector Parts for Other Checker Marathon Years
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