Xo vision headrest schematic - XO Vision Car Audio & Video

SOURCE: XO Vision XO-141FM 14.1 in. Car Monitor

Check that you have good ground connections.

Use DVM to check if you have 12VDC to player.
If you have no DVM, you can use small car light bulb with leads.
If bulb lits from ground and hot wires, then player is bad. Or most likely a loose connections.

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SOURCE: XO Vision GX 1236

With solder.

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SOURCE: Xo vision gx2022..need the plug that turns video wire into rca's

radio shack online or crutchfield.com may have what you need