The 1990 Ferrari Testarossa has 14 electrical connector parts with verified fitment on this page — 6 part types and 5 brands, covering the 4.9L H12 engine. Each part includes a manufacturer part number and application notes.
On the 1990 Ferrari Testarossa, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. Most of the listed parts are Temperature Sender / Sensor Connector (6 parts), Throttle Position Sensor (TPS) Connector (4 parts) and Cold Start Valve Connector (1 part). The other 3 part types cover the remaining 3 parts.
Every part on this page is matched to the 4.9L H12 — the only engine offered in the 1990 Ferrari Testarossa.
The most listed brands for 1990 Ferrari Testarossa electrical connector parts are WELLS (4 parts), STANDARD MOTOR PRODUCTS (4 parts) and UNITED MOTOR PRODUCTS (3 parts), plus 2 more brands.
2 parts on this 1990 Ferrari Testarossa page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS HP3860 (Temperature Sender / Sensor Connector) and WELLS 1P1347 (Temperature Sender / Sensor Connector). Click any part number to see every vehicle that part fits.
Cold Start Valve Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1P1347 | 🇺🇸 US 🇨🇦 CA | Wire Gauge Measurement: 18 | View on Amazon |
This table covers the harness connectors at the Cold Start Valve. 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.
One part is listed for the 1990 Ferrari Testarossa — WELLS 1P1347.
Cold Start Valve Temperature Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1P1347 | 🇺🇸 US 🇨🇦 CA | Wire Gauge Measurement: 18 | View on Amazon |
This table covers the harness connectors at the Cold Start Valve Temperature Switch. 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.
One part is listed for the 1990 Ferrari Testarossa — WELLS 1P1347.
Distributor Pickup Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS | CON201 | 🇺🇸 US 🇨🇦 CA | with Quick Release Clip | View on Amazon |
This table covers the harness connectors at the Distributor Pickup 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.
One part is listed for the 1990 Ferrari Testarossa — UNITED MOTOR PRODUCTS CON201.
Oil Temperature Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS | CON201 | 🇺🇸 US 🇨🇦 CA | with Quick Release Clip | View on Amazon |
This table covers the harness connectors at the Oil Temperature Switch. 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.
One part is listed for the 1990 Ferrari Testarossa — UNITED MOTOR PRODUCTS CON201.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | HP3860 | 🇺🇸 US 🇨🇦 CA | HandypackTerminal Type: Blade | View on Amazon |
| WELLS Popular | 1P1347 | 🇺🇸 US 🇨🇦 CA | Wire Gauge Measurement: 18 | View on Amazon |
| ACDELCO | PT2164 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| FOUR SEASONS | 70005 | 🇺🇸 US 🇨🇦 CA | 2 Terminal FemaleFull Skirt | View on Amazon |
| FOUR SEASONS | 70017 | 🇺🇸 US 🇨🇦 CA | 2 Terminal FemaleHalf Skirt | View on Amazon |
| STANDARD MOTOR PRODUCTS | S697 | 🇺🇸 US 🇨🇦 CA | Connector Shape: RectangleHarness Length | View on Amazon |
This table covers the harness connectors at the Temperature Sender / 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.
6 Temperature Sender / Sensor Connector parts are listed for the 1990 Ferrari Testarossa, from STANDARD MOTOR PRODUCTS, FOUR SEASONS, WELLS and 1 other brand. STANDARD MOTOR PRODUCTS HP3860 carries the "Popular" badge.
This group includes STANDARD MOTOR PRODUCTS HP3860, WELLS 1P1347 and ACDELCO PT2164 and the remaining parts above.
Throttle Position Sensor (TPS) Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | HP3975 | 🇺🇸 US 🇨🇦 CA | Handy PackBlack | View on Amazon |
| STANDARD MOTOR PRODUCTS | S745 | 🇺🇸 US 🇨🇦 CA | Connector Shape: Rectangleblack | View on Amazon |
| UNITED MOTOR PRODUCTS | CON149 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1P1421 | 🇺🇸 US 🇨🇦 CA | Wiring Harness Length: 9.43 In | View on Amazon |
This table covers the harness connectors at the Throttle Position Sensor (TPS). 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.
4 Throttle Position Sensor (TPS) Connector parts for the 1990 Ferrari Testarossa come from 3 brands — STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and WELLS.
Part numbers include STANDARD MOTOR PRODUCTS HP3975, STANDARD MOTOR PRODUCTS S745 and UNITED MOTOR PRODUCTS CON149, among others listed above.
Buying Electrical Connector Parts for a 1990 Ferrari Testarossa
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Confirm you have the 4.9L H12 engine — every part on this page is matched to it.
- 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: Temperature Sender / Sensor Connector and Throttle Position Sensor (TPS) Connector .
Frequently Asked Questions
How many electrical connector parts fit the 1990 Ferrari Testarossa?
Our catalog currently lists 14 electrical connector parts for the 1990 Ferrari Testarossa across 6 subcategories and 5 brands, covering the 4.9L H12 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical connector problems on a 1990 Ferrari Testarossa?
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 1990 Ferrari Testarossa 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 1990 Ferrari Testarossa?
Every part on this page is matched to the 4.9L H12 engine. 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 1990 Ferrari Testarossa
Electrical Connector Parts for Other Ferrari Testarossa Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.