If you are searching for an HDMI wire color code diagram to repair a broken cable, terminate a custom wall plate, or wire an AV rack, here is the hard truth up front: while the 19-pin connector layout is strictly governed by the HDMI Forum, internal wire insulation colors are not standardized. There is no universal 'red is Pin 1' rule. To successfully map, repair, or terminate an HDMI cable, you must rely on the standardized pinout and use a multimeter to trace the manufacturer-specific internal colors to the 19 pins.
The Standard 19-Pin HDMI (Type A) Pinout Table
Below is the definitive pinout for the standard HDMI Type A connector. This layout applies to all versions from HDMI 1.0 through HDMI 2.1b (48 Gbps). When looking at the male connector face-on (the side that plugs into the TV), Pin 1 is on the top right, and Pin 19 is on the top left. The bottom row runs from Pin 10 (right) to Pin 19 (left) on the reverse side, but standard soldering diagrams map them sequentially.
| Pin | Signal Name | Function / Description |
|---|---|---|
| 1 | TMDS Data2+ | Video/Audio data pair 2 (Positive) |
| 2 | TMDS Data2 Shield | Ground/Shield for Data2 |
| 3 | TMDS Data2- | Video/Audio data pair 2 (Negative) |
| 4 | TMDS Data1+ | Video/Audio data pair 1 (Positive) |
| 5 | TMDS Data1 Shield | Ground/Shield for Data1 |
| 6 | TMDS Data1- | Video/Audio data pair 1 (Negative) |
| 7 | TMDS Data0+ | Video/Audio data pair 0 (Positive) |
| 8 | TMDS Data0 Shield | Ground/Shield for Data0 |
| 9 | TMDS Data0- | Video/Audio data pair 0 (Negative) |
| 10 | TMDS Clock+ | Pixel clock signal (Positive) |
| 11 | TMDS Clock Shield | Ground/Shield for Clock |
| 12 | TMDS Clock- | Pixel clock signal (Negative) |
| 13 | CEC | Consumer Electronics Control (1-wire bus) |
| 14 | Reserved | Utility / HEAC (Usually unconnected in standard cables) |
| 15 | DDC SCL | I2C Clock for EDID/HDCP communication |
| 16 | DDC SDA | I2C Data for EDID/HDCP communication |
| 17 | DDC/CEC Ground | Signal ground for DDC and CEC |
| 18 | +5V Power | Supplies up to 50mA to read EDID when display is off |
| 19 | Hot Plug Detect | Signals source that display is connected/powered |
Source: HDMI Licensing Administrator Specification
Why Internal Wire Colors Vary (And How to Trace Them)
Inside a standard HDMI jacket, you will typically find four shielded twisted pairs (for the TMDS data and clock channels), surrounded by a braided or foil overall shield, plus five to seven individual unshielded wires for the low-speed signals (CEC, DDC, +5V, HPD). Manufacturers like Monoprice, Belkin, or Amazon Basics use whatever spool colors are cheapest at the time of extrusion. You might open one cable and find the TMDS Data2+ is blue, while another brand uses red.
Safe Interpretation When Markings are Faded or Missing:
Never guess based on color. If you are repairing a cable where the internal colors are faded, or you are mapping a bulk spool to a keystone jack, you must perform a continuity trace.
- Prep the Meter: Set your multimeter (e.g., Fluke 117 or Klein MM400) to continuity mode (the diode/sound wave symbol).
- Establish Ground: Touch one probe to the outer metal shell of the HDMI plug. This is your chassis ground. Probe the individual shields (Pins 2, 5, 8, 11, and 17) to confirm they all read < 1 ohm to the shell.
- Map the Pairs: Touch the probe to Pin 1 on the connector, then test the stripped internal wires until the meter beeps. Label that wire with tape as 'Data2+'. Repeat for all 19 pins.
- Identify the Drain Wires: The bare, un-insulated copper strands wrapped around the twisted pairs are drain wires. These must be soldered to the corresponding Shield pins (2, 5, 8, 11) and the main connector shell to prevent EMI from destroying the 48 Gbps signal integrity.
Pins and Rows People Get Wrong
Pin 18 (+5V Power) is the most dangerous pin on the HDMI interface. It provides 5V from the source to the display's EDID EEPROM. If you accidentally cross Pin 18 with any TMDS data pin (1-12) or short it to the DDC ground (Pin 17) during soldering, you will instantly fry the HDMI controller IC on your motherboard, GPU, or AV receiver. Always verify Pin 18 isolation with a multimeter before plugging a DIY-terminated cable into live equipment.
TMDS Pair Polarity Swaps:
Transition Minimized Differential Signaling (TMDS) relies on phase cancellation to reject noise. If you swap the '+' and '-' wires within a single pair (e.g., swapping Pin 1 and Pin 3), the receiver will reject the signal entirely, resulting in a black screen or a 'No Signal' error. However, if you accidentally swap entire pairs (e.g., wiring Data0 to the Data2 pins), you will get a handshake failure or severe color distortion (magenta/green tint), because the HDCP encryption and pixel mapping will fail. According to Extron's HDMI Backgrounder, maintaining strict pair-to-pin mapping is non-negotiable for HDCP 2.2/2.3 compliance.
Pin 19 (Hot Plug Detect) Floating:
If Pin 19 is not connected, the source device (like a PS5 or Apple TV) will not know a display is attached and will not output a signal. If your DIY repair yields 'No Signal' but the EDID reads correctly, check Pin 19 continuity.
HDMI Versions and Connector Variants
While the electrical signals remain conceptually similar, the physical connectors and bandwidth requirements change across the ecosystem.
| Variant | Common Name | Pin Count | Mapping Note |
|---|---|---|---|
| Type A | Standard HDMI | 19 | Standard layout. Used on TVs, GPUs, Consoles. |
| Type C | Mini HDMI | 19 | Pinout is logically identical, but physical pin locations are rearranged. Requires a specific Mini-HDMI soldering breakout board. |
| Type D | Micro HDMI | 19 | Extremely dense. DIY soldering is nearly impossible without a microscope; use adapters instead. |
| Type E | Automotive | 19 | Features a locking tab and heavy shell for vibration resistance. Pinout matches Type A. |
A Note on HDMI 2.1 (Ultra High Speed):
HDMI 2.1 pushes bandwidth to 48 Gbps to support 4K@120Hz and 8K@60Hz. At these frequencies, signal wavelength is so short that a 2mm solder joint with improper shielding will act as an antenna, causing bit errors and screen dropouts. For HDMI 2.1, DIY soldering of the connector head is highly discouraged unless you have a Time Domain Reflectometer (TDR) to verify impedance matching.
Decision Path: Which Wiring Method to Choose
Use this decision tree to determine the correct termination or repair method for your specific AV scenario.
| Scenario | Condition | Concrete Action / Part Pick |
|---|---|---|
| Repairing a broken Type A head on a standard 1080p/4K30 cable (HDMI 2.0 or lower) | Cable length < 5 meters | Strip, trace with multimeter, and solder a replacement 19-pin solder-type HDMI plug (available from electronics suppliers). Use heat shrink on each TMDS pair. |
| Running AV through walls/ceilings for 4K120 or 8K (HDMI 2.1) | In-wall run > 3 meters | DO NOT DIY solder. Purchase a pre-terminated Certified Ultra High Speed Fiber Optic HDMI cable (e.g., RuiPro or Phantoms). Copper fails at 48Gbps past 5m without active boosting. |
| Terminating a custom wall plate in a conference room | Need modular flexibility | Use an HDMI Keystone Jack (Coupler style). Do not strip the main cable to punch down; instead, use short, certified patch cables on either side of the keystone to maintain impedance. |
| Extending HDMI over 50+ meters | Long distance point-to-point | Abandon native HDMI copper. Use an HDBaseT Extender kit (e.g., Blustream or Wyrestorm) over shielded Cat6a, or an AV-over-IP encoder/decoder pair on a dedicated VLAN. |
When pulling any HDMI cable through conduit, always wrap the connector heads in bubble wrap and electrical tape to prevent the delicate Pin 19 and CEC pins from bending backward. If a connector gets crushed in the wall, you will be forced to cut it off and rely on the continuity tracing method outlined above to attach a field-terminable plug.
