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  #1  
Old 03-01-2014, 05:06 PM
edge's Avatar
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Alpine Head Unit keep shutting down intermittently!

Now lately my Alpine iDA-X200 Head Unit with my 8" Bazooka sudwoofer has been shutting down intermittently lately. I would be driving and it would shut down then power up again. I check the connections and there does not seem to be anything loose. Is this an indication that my battery is weak and cannot power my stereo? Or that my alternator is weak and can't adequately charge my battery? When I am driving along, is my alternator or battery powering my stereo? Thanks.
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Old 03-01-2014, 05:10 PM
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I have an Alpine that did the same thing. For me it turned out to be a weak regulator or alternator. I simply replaced the alternator for an amperage upgrade.
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Old 03-04-2014, 06:09 PM
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When you're driving, the electrical load is on the alt, though if the alt is kicking less voltage than the battery has stored, the battery will feed the system as well. This is why a gas-powered car can actually run for a (brief) period of time with a non-functional alt: everybody's running off the battery, at least until the battery hits low enough voltage that the coil can't do its job anymore. After that, bad things happen that usually involve tow trucks.

I would be very tempted to hook up a voltage gauge somewhere (maybe hook a cigarette lighter adapter to a cheap parts store volt gauge?) and watch where your voltage is at when the head unit shuts down.

I know on my W124, if it's cold out, the car is freshly-started with glow plugs having just run, the lights, fan, defroster, amplifiers, and air ride compressor are all running, sometimes my HU will shut down for a minute, which I'm 99% sure is a low-voltage condition. Time to invest in a bigger alternator for me.

EDIT: Stop! Grammar time!
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Old 03-04-2014, 10:59 PM
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Quote:
Originally Posted by TheAlmightySam View Post
This is why a gas-powered car can actually run for a (brief) period of time with a non-functional alt.....
Side story. All my dash lights came on at once. I had to power the car out of snow, in doing so the alt belt came off. I managed a half hour drive in a gasser at night on country backroads for 30 minutes, then through town. Lights slowly dimmed, but she made it.
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Old 03-05-2014, 01:33 PM
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Quote:
Originally Posted by LandYaghtLover View Post
Side story. All my dash lights came on at once. I had to power the car out of snow, in doing so the alt belt came off. I managed a half hour drive in a gasser at night on country backroads for 30 minutes, then through town. Lights slowly dimmed, but she made it.
Side story #2: On the early Cummins turbo diesels, the only electrical goodie needed to keep the truck running is a single fuel shutoff valve. It's a pretty common mod to simply remove that valve (or jam it open), which will let the truck run indefinitely without a battery or alternator so long as it has fuel. Kinda neat.
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Old 03-22-2014, 03:33 PM
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Recharged the battery and it holds the charge well. After fully charging overnight, the volts read 12.72, a bit high but after an overnight. With the engine running the volts are reading 13.2-3 so it's charging properly. Is the Alpine head unit + the Bazooka 8" sub requiring too much juice for the oem alternator? It a Walmart battery less than 2 years old made by Johnson controls. What to do?
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85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)
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