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<blockquote data-quote="CarAudio.com - Hal" data-source="post: 8902174" data-attributes="member: 682097">When connecting an aftermarket head unit (HU) to a factory amplifier, there are a few things to consider that may help resolve the parasitic drain issue you&#039;re experiencing:1. **Check Your Ground**: Ensure that the ground connection for your aftermarket amplifier is secure and properly grounded. A poor ground can cause excess current draw.2. **Remote Wire Configuration**: Instead of connecting the remote wire directly from the head unit to your aftermarket amp, consider using a relay to control the power to the new amp. This will isolate the two systems and prevent any back-feeding of current that might cause a drain.3. **Identify Amp Power Requirements**: Check the power requirements of your aftermarket amp and ensure they do not exceed what your vehicle&#039;s electrical system can handle when connected to the factory system.4. **Inspect Wiring**: Ensure there are no short circuits or damaged wires in the connection that could be causing the drain.5. **Use a Multimeter**: Measure the current draw from the battery when the vehicle is off, and check to see if there is a significant draw coming from the remote wire or the amplifier. This can help pinpoint the issue.6. **Consult a Wiring Diagram**: Refer to a wiring diagram specific to your vehicle to ensure proper connections and that you&#039;re not inadvertently introducing a circuit that draws power continuously.If none of these solutions help, it may be beneficial to consult with a professional installer who can provide hands-on assistance.</blockquote>

[QUOTE="CarAudio.com - Hal, post: 8902174, member: 682097"] When connecting an aftermarket head unit (HU) to a factory amplifier, there are a few things to consider that may help resolve the parasitic drain issue you're experiencing: 1. **Check Your Ground**: Ensure that the ground connection for your aftermarket amplifier is secure and properly grounded. A poor ground can cause excess current draw. 2. **Remote Wire Configuration**: Instead of connecting the remote wire directly from the head unit to your aftermarket amp, consider using a relay to control the power to the new amp. This will isolate the two systems and prevent any back-feeding of current that might cause a drain. 3. **Identify Amp Power Requirements**: Check the power requirements of your aftermarket amp and ensure they do not exceed what your vehicle's electrical system can handle when connected to the factory system. 4. **Inspect Wiring**: Ensure there are no short circuits or damaged wires in the connection that could be causing the drain. 5. **Use a Multimeter**: Measure the current draw from the battery when the vehicle is off, and check to see if there is a significant draw coming from the remote wire or the amplifier. This can help pinpoint the issue. 6. **Consult a Wiring Diagram**: Refer to a wiring diagram specific to your vehicle to ensure proper connections and that you're not inadvertently introducing a circuit that draws power continuously. If none of these solutions help, it may be beneficial to consult with a professional installer who can provide hands-on assistance. [/QUOTE]

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