Diode Dynamics · DD3021P
H11 signal support for an LED bulb upgrade
A pair of inline modules designed to help address flickering and bulb-out warnings. Match the H11 connection and confirm the vehicle’s electrical requirements before ordering.

Choose the correct connection
- SKU
- DD3021P
- Package
- Two H11 modules
- Intended loads
- LED bulbs or 35W HID; not recommended for 55W HID
- Warranty
- Manufacturer three-year limited warranty; terms apply
These modules are designed for power smoothing and electrical feedback. They are not a bulb conversion or a substitute for diagnosing damaged wiring.
F-150 low-beam packages
Diode lists this pair with its H11 SL2 and SL2 Pro low-beam packages for 2018–2023 F-150 trucks with replaceable halogen bulbs. Factory LED headlamps require a different solution.
Confirm the headlamp type, bulb connector and intended package. Diode does not guarantee correction of every fault on every vehicle.











