Bridge the Gap Between Your Old B05 Harness and the New STB Controller
The AMP Research 19-04361-90 is a plug-and-play pigtail adapter harness designed to connect the older B05 wiring harness connector to the updated STB1 PowerStep controller. When upgrading from a legacy B-03 or B-05 controller to the newer STB (Standard Type B) unit, the connector styles do not match. The 19-04361-90 pigtail end solves that problem in seconds, plugging inline between the vehicle’s existing harness and the new controller without any cutting, splicing, or crimping. If you are installing the 19-04280-STB replacement controller on a truck or SUV that originally used a B-03 or B-05 controller, this adapter is required to complete the retrofit.
Key Features
- Bridges older B05 harness connector to the updated STB1 controller plug
- Required adapter when upgrading from B-03 or B-05 to 19-04280-STB controller
- No cutting, splicing, or crimping required
- Plug-and-play design for fast, tool-free installation
- Genuine AMP Research certified replacement part
- Designed and engineered in the USA
- Compatible with AMP Research PowerStep systems that use the legacy B05 harness connector
Specifications
| Detail | Value |
|---|---|
| Part Number | 19-04361-90 |
| SKU | AMP19-04361-90 |
| UPC | Not Available |
| Type | Pigtail Wiring Adapter / Harness End |
| Application | B05 to STB1 Controller Retrofit |
| Country of Origin | USA |
| Quantity | 1 Pigtail Adapter |
What’s Included
- 1 x AMP Research 19-04361-90 B05 to STB pigtail adapter harness end
Related Parts on Our Site
- 19-04280-STB Replacement Controller Standard Type B (the controller this adapter is designed for)
- 19-04280-STA Replacement Controller Standard Type A
- 19-04279-XTA Replacement Controller Xtreme Type A Revision 6
- 79106-01A Override Toggle Switch
- 79107-01A Override Switch with STB1 Controller
- 75131-01A PowerStep LED Light Kit
About AMP Research
AMP Research invented the automatic power running board and remains the industry leader in retractable PowerStep technology. Every AMP Research component is designed and engineered in the USA using military-grade materials and tested to withstand years of underbody exposure, vibration, and daily use. AMP Research certified replacement parts are manufactured to the same specifications as the original factory-installed components.
Frequently Asked Questions
What is the AMP Research 19-04361-90?
The AMP Research 19-04361-90 is a pigtail wiring adapter harness end that allows the legacy B05 harness connector found on older AMP Research PowerStep systems to mate with the updated STB1 controller used on the 19-04280-STB replacement unit. It is a required adapter for any B-03 or B-05 controller retrofit installation.
Do I need this adapter to install the 19-04280-STB controller?
Yes, if your existing PowerStep system uses the older B05 wiring harness connector style. The 19-04361-90 plugs inline between your vehicle harness and the new 19-04280-STB controller. Systems already wired with the STB connector do not need this adapter.
Does the 19-04361-90 require any cutting or splicing?
No. The adapter is a plug-and-play harness end that connects without cutting, splicing, or crimping. It clicks directly onto both the existing vehicle harness and the new STB controller.
What is the difference between B-03, B-05, and STB controllers?
B-03, B-05, and STB are successive generations of AMP Research Standard Type PowerStep controllers. Each generation improved electronics reliability, but the physical wiring connector changed between the B05 and STB designs. The 19-04361-90 adapter bridges those two connector styles so older harnesses work with the newer STB unit.
Will this pigtail work with the 19-04280-STA Type A controller?
No. The 19-04361-90 is specifically designed for the B05 to STB1 retrofit on Standard Type B systems. Type A systems use a different controller family (A-04 and A-06 series) and do not require this adapter. For Type A replacements, see the 19-04280-STA controller on our site.
Is this a genuine AMP Research part?
Yes. The 19-04361-90 is an AMP Research certified replacement component manufactured to the same specifications as the original factory-installed harness. It is designed and engineered in the USA.
Does AMP Research offer a warranty on this pigtail?
AMP Research certified replacement parts are covered under their standard warranty policy. Contact AMP Research technical support at 888-983-2204 for warranty details specific to replacement components.
Where can I find installation help for this adapter?
AMP Research provides technical support videos and phone support at 888-983-2204 for all PowerStep controller replacements. The 19-04361-90 installs in seconds by simply unplugging the old B05 connector from the existing harness and clicking the adapter in place before connecting the new STB controller.
Installation Instructions
- Disconnect the vehicle battery negative terminal before working with any electrical components.
- Locate the existing PowerStep controller and unplug the B05 harness connector from the old controller.
- Plug the 19-04361-90 pigtail adapter into the B05 side of the vehicle harness connector until it clicks into place.
- Plug the other end of the pigtail adapter into the inlet port on the new 19-04280-STB controller.
- Reconnect the battery and test step deployment by opening each door.
- Mount the new controller in the factory location using the original hardware.
