Which connector does DT Connector Pigtail Harness use?

DT-series receptacle, 2 / 3 / 4 position, compatible with Deutsch DT series.

What ingress protection does DT Connector Pigtail Harness have?

Sealing is rated IP68 when mated (per supplier rating, see notes).

What lengths does DT Connector Pigtail Harness come in?

Build lengths are 200 mm standard, custom on request.

DT Connector Pigtail Harness, 2/3/4-Pin Sealed Leads

Last updated: 13 September 2026

Overview

A dt connector pigtail harness is the short sealed lead that turns a light bar, rock light or work lamp with flying leads into something you can unplug. One end is a DT-series receptacle, the other is stripped and tinned copper. The point is service: a damaged lamp can be swapped at the roadside instead of re-spliced at the side of a track. It is the wedge-lock connector family used across off-road, marine, agricultural and construction lighting, and it is chosen as much for the seal as for the contact.

Key Specifications

Connector	DT-series receptacle, 2 / 3 / 4 position, built to the Deutsch DT series interface
Termination	Stripped and tinned stranded copper leads
Wire gauge	16 AWG standard, 14 AWG optional
Lead length	200 mm standard, custom on request
Sealing	Interface seal and rear wire seal, overmolded body
Ingress rating	IP68 when mated (published figure for the mated family, see notes)
Temperature range	Wide range for engine-bay and winter service
Keying	Four mechanical keyway options to separate circuits
Options	Mating plug version, two-outlet splitter, custom lengths and markings

The DT family at a glance

DT is one of three shell sizes in the same product family, and picking the right one is a contact size decision rather than a pin count decision. The figures below are the commonly published ones for the family; your assembly is built and verified to the values on your drawing.

Series	Contact size	Positions	Typical use
DTM	Size 20	2 to 12	Signal and low current circuits
DT	Size 16	2 to 12	Lighting, solenoids, general power — this pigtail
DTP	Size 12	2 to 4	Higher current feeds and motor leads

Keying: the reason two black plugs will not swap

DT connectors are offered with several mechanical keyway options, identified by the color of the wedge lock on the mating plug. The keyway does one job and does it well: it stops a 2-pin plug from a left-hand lamp going into the 3-pin receptacle of a rear work light, and it stops two identical circuits being swapped during a roadside repair in the dark. If your build has more than one DT connector in the same area, specify the keying per position and we will match the wedge locks.

Pin count: match the plug, not the wires

Positions	Choose it when	Watch out for
2	A single lamp or a simple two-wire device	Nothing else fits, so confirm the mating plug first
3	Two lamp functions share one connector	Some 3-position lamps only populate two pins
4	Multi-function lamps with separate circuits	Some 4-position lamps only populate two

Pick the pin count to match the mating plug on the lamp, not the number of wires the lamp has. Counting wires instead of positions is the most common reason a pigtail arrives and will not mate.

Sealing, and where water actually gets in

The connector body carries an interface seal and a rear wire seal, and the pigtail is overmolded, so there is no heat-shrink boot to split and let water track up the strands. That last point is the usual failure mode on this type of part: the connector itself is fine, the water gets in behind the boot and the copper goes green a hand-width up the cable. Two things still help — point the cable entry downward where the installation allows it, and support the lead so it is not hanging in a loop that holds water.

IP68 is the figure published for the mated connector family under the IP code system. It applies to a mated pair, and your assembly is verified to the value stated on your drawing rather than to a rating printed on a bag.

Wire and temperature

Leads are stranded tinned copper at 16 AWG, with 14 AWG available where the run is long or the lamp draw is high. Tinned rather than bare copper because these connections live in wet and salty environments and the tin buys years. The assembly is specified for continuous service across a wide temperature range, covering an engine bay and a northern winter.

Typical applications for this dt connector pigtail harness

Off-road and UTV lighting: light bars, pod lights, rock lights under the body
Marine installations where the connection sits in spray
Agricultural and construction machines with auxiliary work lamps, alongside our DT06 to J1939 adapter cable for tractors and excavators
Any build where a lamp has to come off for service or transport
Trailer and tow-behind lighting that gets unplugged at the end of a season

Also available

The mating plug version, for building the harness side; a two-outlet splitter for running two lamps from one feed; and custom lead lengths, printed wire markings and different wire gauges. Send the lamp connector part number and the lead length you need and we will build to it.

Workmanship and testing

IPC/WHMA-A-620 Class 3 is the workmanship standard and ISO 9001 is the quality system behind it. We work from 32 to 12 AWG. Nothing ships without a continuity and pinout check, and seal checking can be added where an ingress rating is part of the specification.

Custom builds and ordering

Small runs start at 5 pcs and leave in 3 working days. At production volume the minimum is 500 pcs and lead time is 14 working days after approval. New tooling is about 10 working days on top. OEM and ODM orders ship under your part number, with material certificates and first-article reports available.

Related heavy-duty connectors and leads

Full range: automotive cable and wire harness assemblies.

Frequently Asked Questions

How do I know which pin count to order?

Count the positions on the mating plug, not the wires on the lamp. Several 3- and 4-position lamps only populate two pins.

Is it the mating plug or the receptacle?

This part is the receptacle with leads. The mating plug version, for building the harness side, is available on the same lead.

Why tinned copper?

These connections live in wet, salty environments. Tinned strand resists the corrosion that turns bare copper green and raises resistance at the crimp.