Question about Alpine MRD-M1000 Car Audio Amplifier

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Voltage drop my voltage meter drops dowm from 13.8 to 11.0 when the bass hits and it stays there

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You're drawing a ton of power from the car's electrical system. Get a stiffening capacitor and put it in on the amp's main power cable. If you're draining the car that badly, make sure to get at least a 1 farad cap, bigger if you can, and until you do, turn the gain down and don't run so much bass - you'll kill your battery in the meantime.

Posted on Jul 29, 2008

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When i hit breaks or turn lights it kills the power to motor


Look for a bad engine ground ! Voltage drop the ground circuits for charging system , body grounds etc... Go on you tube an check out videos on basic automotive electrical trouble shooting , voltage drop testing , how to read a wiring diagram , how to use a DVOM -digital volt ohm meter . Go to http://www.bbbind.com/free_tsb.html free wiring diagrams . Also check out how to test PCM/ECM inputs an outputs ECM Inputs and Outputs Diagnosis

Apr 24, 2016 | Cars & Trucks

2 Answers

I've already replaced the starter, battery, terminal posts, and alternator. It will start of a jump after charging for about ten minutes but will not start when switching the batteries out. It just do


Could be poor battery connections or bad (corroded) cables. Put a voltmeter on the battery: ideal would be over 12.6 volts, if less than 12.2 volts, recharge battery.

If you have a voltmeter, google "voltage drop test" to see how to check for high resistance to current flow. Check the positive battery cable from battery to the starter. It may help you find a poor connection.

Jan 15, 2015 | Cars & Trucks

1 Answer

Startermotor not working on zxr400


If you have a voltage meter, connect it to the battery, you should have at least 12.2 volts, hit the starter button and watch the meter...if the meter does not drop, then no power is going to the starter. Let me know what you find.

Sep 27, 2011 | 1992 kawasaki ZXR 400

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Charging problem. Have a 97 isuzu rodeo 2wd put new alt and battery in it and when I put a load on the volt meter drops to 12.7. At idle it's on 14 . Why is it doing this?


Because of the load. It will drop in voltage, this is normal. As long as it stays above 12 you will be fine. But just to be sure start the car and turn everything on, then check the voltage. If it stays at 12.7 it's good.

Aug 09, 2011 | 1997 Isuzu Rodeo

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My bike won't start. Nothing happens when I hit


If you can identify the in/out connectors on it (these will be beefier than the solenoid control input), you can use an automotive 'test light' or meter on it. With the light, you will have close to your battery voltage until the solenoid is activated with the start switch, then it should extinguish. With meter set to 20 V DC range, you should see the battery voltage and this should drop to zero when the start switch is supplying voltage to the solenoid coil.
You might check over all connections in the lines to the starter since corrosion can cause too much voltage drop which starves the starter which will draw double digit amperes.

Apr 04, 2010 | 2004 Yamaha TT-R 225

2 Answers

My 1997 jeep grand cherokee tsi with a 5.2 seems to have a charging problem. the alternator is a year old and was tested twice in the last week at 2 different locations and was shown to be good. same thing...


How is the pigtail ground strap from engine block to body? Have you had engine diagnostic test done? Voltage rVOLTAGE DROP TEST
A voltage drop test is the only effective way to find excessive resistance in high amperage circuits. It's a quick and easy test that doesn't require any disassembly and will quickly show you whether or not you've got a good connection or a bad one.
To do a voltage drop test, you create a load in the circuit that's being tested. Then you use a digital volt meter (DVM) to measure the voltage drop across the live connection while it is under the load. Voltage always follows the path of least resistance, so if the circuit or connection being tested has too much resistance some of the voltage will flow through the DVM and create a voltage reading.
voltage_drop.jpg

If a connection is good, you should find little or no voltage drop and see less than 0.4 volts for most connections, and ideally less than 0.1 volts. But if you find more than a few tenths of a voltage drop across a connection, it indicates excessive resistance and a need for cleaning or repair.
CHECKING THE STARTER CIRCUIT
To check the starter circuit for excessive resistance, you need to measure the voltage drop at the battery, battery cable connections and starter while the engine is being cranked.
The first check is "available battery voltage." For the starter to crank at normal speed, the battery must be at least 75% charged (12.4 volts or higher). Low battery voltage can not only affect the starter but every other electrical system in the vehicle.
A. Set your DVM to the 20 volt scale, then connect meter positive (+) lead to battery positive (+) post (not the clamp or cable), and the meter negative (-) lead to battery negative (-) post.
B. Disable the engine so it will not start when it is cranked. (Ground the ignition coil wire, or disable the ignition circuit or fuel pump relay.) Limit cranking time to 15 seconds or less.
C. While cranking the engine, record the volt reading on the DVM. D. Next, connect your meter positive (+) lead to the battery terminal stud on the starter, and the meter negative (-) lead to the starter housing.
E. While cranking the engine, record the volt reading.
F. Compare the two voltage readings. If both are the same, there are no excessive voltage drops on the positive feed side.
G. If available voltage at the starter is not within one (1) volt of battery voltage, there is excessive voltage drop in the circuit.
The next test is for voltage drop on the positive side of the starter circuit.
A. Make sure the battery is fully charged.
B. Disable ignition.
C. Set DVM on 2 volt scale.
D. Connect meter positive (+) lead to positive (+) battery post, and the meter negative (-) lead to the battery terminal stud on the starter. While cranking the engine, record the voltage reading.
The maximum allowable voltage drop including the solenoid or external relay in the starter circuit should be 0.6 volts or less.
If you find more than a 0.6 volt drop in the starter circuit, you can isolate the bad connection by using the following voltage drop tests.
* Check the positive battery post and cable connection by measuring the voltage drop between the two while cranking the engine. Connect the meter positive lead to the battery post and the meter negative lead to the cable clamp. A good post/cable connection should have zero voltage drop.
* Check the positive battery cable by measuring the voltage drop end to end while cranking the engine. Connect the meter positive lead to the clamp on the positive battery cable, and the meter negative lead to the end of the cable at the starter. Crank the engine and note the voltage reading. A good cable should have a voltage drop of 0.2 volts or less.
* To check the starter solenoid or relay connections, connect the meter positive lead to positive battery terminal on the solenoid or relay, and the meter negative lead to the starter motor terminal. Crank the engine and note the reading. A good connection should have a voltage drop of 0.2 volts or less.
Next, you need to check the negative side of the starter circuit. To check the entire circuit, connect the meter positive lead to a clean spot on the starter motor case and the meter negative lead to the negative battery post. Crank the engine and note the reading. The voltage drop on the negative side should be 0.3 volts or less.
If the voltage drop is too high, set your DVM to the 2 volt scale and start checking each connection on the negative side to find the bad connection or cable. Use the DVM leads to check across each connection while cranking the engine as before.
Check the negative battery post/ground cable connection (should be zero voltage drop).
Check the negative ground cable from the battery to the engine (should be 0.2 volts or less).
Check between the negative battery post and starter housing (should be 0.3 volts or less).
Check between the engine block and starter housing (should be 0.10 volts or less).
CHECKING THE CHARGING CIRCUIT
To check the alternator connections on the positive side for excessive resistance:
A. Set DVM on 2 volt DC scale.
B. Connect the meter positive lead to the alternator output stud (B+ terminal).
C. Connect the meter negative lead to the positive (+) battery post.
D. With the engine running at 1,800 to 2,000 rpm with all lights and accessories on (except the rear electric defroster), check the voltage drop reading. It should be 0.5 volts or less. If higher, the connections between the alternator output stud and battery need to be cleaned. Also, look for loose connections or undersized cables.
To check the alternator connections on the negative side for excessive resistance:
A. Set DVM on 2 volt DC scale.
B. Connect meter negative lead to alternator case.
C. Connect meter positive lead to battery negative (-) post.
D. With engine running at 1,800 to 2,000 rpm with all lights and accessories on (except rear defogger), check the voltage drop reading. On the negative side, it should be 0.2 volts or less. If excessive, the connections need cleaning or the negative cable needs to be replaced. Some alternators are mounted in rubber bushings and have a separate ground strap. If so equipped, be sure to check the voltage drop across this strap, too.

egulator checked with voltmeter?

Nov 15, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Same problem, amp cuts out if volume too high


Use a multi meter,set it to 12v,turn system on use some bass.while music is playiing hold pos of multi meter to poss- neg to neg- on amp see what voltage is running at at what its dropping to it sounds more like a voltage drop problem.if you hooked it up back words u could fry unit..Have you done the big 3.what size is your alt,and what is your amps draw..

Aug 26, 2009 | Audio Players & Recorders

1 Answer

Voltage drop test


First, check battery post to cable connection: positive meter lead on battery positive post, negaitve lead on battery's positive cable clamp. Crank the engine and note the reading. A good connection should have zero voltage drop. Second, check the positive cable: positve meter lead on positive battery clamp, negative lead on starter terminal connector. A good cable will show a voltage drop of .2 volts or less while cranking. Third, check the starter connection: positive meter lead on positive battery terminal on the solenoid, negative meter lead on actual starter stud. A good connection will have a voltage drop of near zero volts. Now to check the negative side of the circuit. Total drop on the ground side should be .3 volts or less and can be checked by placing positive meter lead on starter housing and negative meter lead on battery ground post. Take your reading while cranking the engine, and be sure your connection at the starter is solid and clean. If total voltage drop on this side of the circuit is excessive, complete testing at all connections in the same fashion as the positive side of the circuit. Check the following: between battery post and clamp (zero voltage drop), cable end at battery to cable end at engine. (.2 volts or less), cable end at engine to engine itself (near zero voltage drop), and finally between starter housing and engine block (.1 volts or less).

To read the entire procedure for all automotive systems read this artile:
http://www.engine-light-help.com/voltage-drop.html

Aug 31, 2008 | 1997 Chevrolet Blazer

1 Answer

Amp cuts out and back on 30 or so seconds!! Volume has no impact


You need to check the B+ and remote voltage on the amp when it cuts off (assuming that you can recreate the fault).

With your multimeter set to DC volts and the black meter lead on the ground terminal of the amp, touch the red lead alternately to the B+ and remote terminals as the amp shuts down. If the voltage drops below ~11 volts, you need to check the wiring feeding whichever line is dropping too low.

Nov 29, 2007 | Kenwood KAC-7202 Car Audio Amplifier

2 Answers

Amp cuts off


You may have a problem with the power source feeding the amp. You need to check the voltage across the amplifier's B+ and ground terminals when the amp is playing/cutting off. If it's dropping below ~11 volts, you need to determine why it's dropping so low.

Sep 18, 2007 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

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