Question about Pioneer Premier DEH-P960MP CD Player

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Battery drain and HU dangerously hot

After install, battery would drain totally overnight. Amp and sub disconnected with no change. Removed fuse under hood for audio/instrumentation cluster and problem fixed. Returned to installer and I was fortunate that the HU was only on for around 20 minutes, as they discovered that the unit was so hot that it had started to melt wiring and they had to wear gloves to remove it. Old unit was re-installed and no more problems with battery drain. I took my chances buying unit on line and looks like I'm out a few bucks. Just curious, if anyone has experienced the same problems and is there a possible fix? The heat this HU was putting out could have caused alot of damage. Your response is appreciated. Thank you

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I have the same problem with My HU of over heating especially during the hot days of summer. I am gonna try to install a pc fan(square one's)underneath the HU to cool it doqn a bit. Im also gonna run a power wire to the radio power wire so the fan turns on when i turn on the radio on. I want to see if the HU is still overheating. My HU overheats even when just sitting in the car.

Posted on Jun 25, 2008


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How do I stop the anti-theft device red blinking light? Car is off and locked and from the window can see the red light blinking.

the red light drain 0.001amp. from you battery.need 1000 hour to drain 1 amp. test the battery if is any good. do drain test on the car.rust and short will drain battery overnight.after market equipment,light in the trunk or glove box, under hood light etc. disconnect the battery and install amp meter. do the drain test. your computers uses 0.2-0.4amp when sleep.anything over 0.5-.6 amp is bad. after you connect the amp meter give 1min. to turn all systems to sleep mode.Is normal the first minute to be high drain.
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My car is draining battery even with ignition and light off

That means that you have a parasitic drain, that can be caused by a short or by a defective device.

First try to understand if there is a parasitic drain.

Once you exclude the drain, replace the battery, a battery with shorted cells can cause the drain.

To measure drainage remove ignition key, connect the amp meter between the battery positive wire connector and positive terminal.A couple of milliamps drainage is normal, and is caused by instruments, car stereo memory, ECU etc.
Start removing more fuses , and open the wiring at different points , trying to locate the problem.
Remove the fuses and see if you have drain by connecting a meter to read amps on battery, if you have drain with no fuse, then the problem is insulated to wiring harness before the fuse, with something shorted between the battery and the fuseblock.
Also check car stereo and car amp HU, the HU can keep a unit on when the ignition key is off, causing drainage.

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How is 2001 Mustang GT parasitic draw on battery related somehow to FU 27 and FU39? Battery drains overnight but I cannot narrow down a faulty component. has an article if you Web search your car with fuse 27 and 32 as part of the search. It blames the GEM as part of the problem(wiper) and also points out that the radio has several power feeds. Fuse 27 is hot all the time, but fuse 32 is only hot in ACC or Run. So as long as you can test fuse 32 to be hot in only Acc or Run, it should not drain the battery in Off position. You might want to test the ignition switch to verify it is really turned off.

The all mustangs article had different symptoms, as you did not indicate whether the fuses popped.

The wiper motor is suppose to derail and turn off. If you can unplug the wiper motor overnight and the battery stays up, you would know that it is either the wiper motor or wiper control. The radio is on the other fuse circuit. But whether the radio can drain a battery in a short time, you need to measure draw, but if the fuse pops, the battery should stay up. Again, disconnecting a circuit like a radio, and then having the battery stay up, would point to the radio circuit being at fault.

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Battery drain overnight

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KDR606. When installed runs down battery overnight. Battery is OK. Connections as per installation instructions.New unit replacing Toyota factory radio/cassette.

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