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Somebody attemted to install the radio and now it is draining the batery

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You'll have to open the dash and get to the radio wiring for these solutions.

Solution #1: Sounds like the ACC lead (yellow) and the Power lead (red) are both connected to the same power wire.

If the radio is able to be turned on and played while the vehicle is off and the key is out, then both of these leads have been wired together. That's bad. There are two different leads for this...one is for power when the vehicle is turned on to operate the radio/CD, and the other is a trickle to keep station presets, personal settings, and clock accurate.

These wires need to be separated.

Solution #2: It is possible that the ground wire was not connected correctly and needs to be connected securely to the ground wire. Does the unit get hot? If so, there may be a grounding issue that needs to be taken care of or run the risk of damage to the radio and possible the vehicle.

Solution #3: Inspect the wiring job. Are the wires twisted in-line or are they twisted and poking up like small antennas? Are they wraped securely with tape? Were thread nuts used (very bad)? Are there any exposed wires at all that you can see in the wiring job? Any exposed wires can cause shorts in your electrical system and drain your battery. You will need to get some electrical tape, shrink tube, or in-line wire clamps for the job.

For all of these solutions you will need to get a wiring diagram for the car, the radio, and the wiring harness that was used. Trace all the leads and make sure they are all correct. Usually you will see them in two blocks, one for power and the other for speakers.

Power: Red (positive charge), Yellow (AAC), Black (Ground/Negative power). You can also find a dimmer lead and a power antenna lead here. If you don't have these capabilities in the vehicle, cap and ignore these.

Speakers: There will be a solid color for one wire (the positive) and the same color with a stripe (negative) for each speaker.

Most systems will print the positive/negative and which speaker they go to on the wires themselves.

Be sure to thank the "somebody" for this stellar install job. I hope you find the problem and get it worked out.

Posted on May 19, 2008

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