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# Diesel Wiring Harnesses & Connectors

Identify injector harnesses, FICM connectors, valve cover pass-throughs and sensor pigtails by exact wiring configuration.

## Explore Parts for Your Diesel System

Find injector harnesses, module connections, valve-cover pass-throughs and sensor pigtails with the right terminals, seals and equipment configuration. Our parts specialists can help with identification and availability questions.

### [Diesel Injector Wiring Harnesses](/parts/injector-wiring-harnesses/)

Injector harnesses can run inside valve covers or between modules and injection components. Routing, oil exposure, terminal style and connector count are application-specific.

[Explore this component](/parts/injector-wiring-harnesses/)

### [Diesel Sensor Connector Pigtails](/parts/sensor-connector-pigtails/)

Connector pigtails are repair components for damaged wiring terminations. Different sensor plugs may have similar shells but different keying or terminal layouts.

[Explore this component](/parts/sensor-connector-pigtails/)

### [FICM & Injector Harness Connectors](/parts/ficm-injector-connectors/)

FICM and injector connectors link electronic control hardware to the injector circuit. Connector resistance or damage can complicate diagnosis.

[Explore this component](/parts/ficm-injector-connectors/)

### [Valve Cover Harness Connectors](/parts/valve-cover-harness-connectors/)

Some engine designs route injector wiring through valve cover connections or gasket-associated pass-throughs. Replacing a similar-looking connector can create sealing problems.

[Explore this component](/parts/valve-cover-harness-connectors/)

## Need Help Matching a Part?

Send us the original part number, engine or equipment model, quantity and any photos of identification marks. Tell us whether you prefer new or refurbished where available. We can help confirm the right part and discuss ordering options.

Use the [component identification inquiry](/parts/find-a-part/) for a specific item, or browse the [DCT online store](/store/) for available products. For pump or injector repair, contact DCT before shipping so we can confirm acceptance and give you receiving instructions.