Question about Alpine MRD-M1005 Car Audio Amplifier

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I accidently put my power wire into ground terminal and ground wire on power side for a second and it sparked. The amp power light still comes on but the sub barely movees. Is there any way i can fix this without sending it in to be repaired?

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Swith the fuses

Posted on May 14, 2010


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Posted on Jan 02, 2017

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SOURCE: I accidently put my power wire into ground

my amp power light didnt go on when i hooked it up what could it be

Posted on Apr 14, 2010

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2 Answers

Put new fuel pump in 2010 chevy express 3/4 ton van have no power to fuse its grounded on both sides only one power to fuel pump relay

I don't know liter size of engine? The relay has two sides, the load side and the control side. The load side, looks like open switch, left side. Terminal 87 is hot all the time. The right side of relay is control side, needs voltage and ground. On the control side, dark green wire with white tracer is voltage, comes from pcm. The black wire is chassis ground.
Are you missing anything else? Engine cranking, you have spark at the plugs where applicable, and fuel injector pulse? With engine cranking, if your missing everything, I'd have to check rpm signal.
fuel pump relay-ghcoodekmg2zyxdq5iv4j4is-3-0.jpg

Jul 07, 2017 | Cars & Trucks

1 Answer

Has spark no injector pulse has power to the injectors

No pulse means the injector ground side is absent, since you have power to the injectors. The ground wire goes into the engine computer to be internally grounded for the pulse. You can test the injector ground side with a test light, as a verification of it not having pulse. If it really has no pulse, but it has correct voltage to the injector solenoid, then you have a bad injector, or a bad ground wire to the pcm, or a bad pcm.

Use a test light with a ground clip and a needle-type probe. Unplug the injector connector and note which is the power wire terminal and which is the ground wire terminal. Clip the test light lead to the POSITIVE battery post, and put the probe into the injector's ground wire terminal. Now have someone crank the engine over and watch for a blinking light on the tester. If you have a blinking light, the injector ground side is working right, so check if voltage to the injector is correct, or if you have a bad injector. If you have no blinking light, then no pulse is correct. You will need to check the ground wire to the computer before assuming a bad computer. I think they are called quad drivers inside the computer that control the injector grounds.

Best way to check that ground wire is, first, take off the negative battery cable, then pull off the computer connectors, then use an ohmmeter to check resistance of wire from injector terminal to the pin on the computer's connector. Low resistance, low ohms, means the wire is good. ...But first I guess you will have to find the pin-out diagram for the computer, where and on which connector that ground wire goes in at. There's around a hundred or more wires going in, so color coding, tracing by the color of the wire would be a royal pain. Good luck, Scott.

May 07, 2015 | Cars & Trucks

2 Answers

96 blazer power windows dont work l can make them go up n down with a power probe the whole drivers door is a positive ground ??

Grounds are negative

Body is ground side of electrical system

Only the wires in a vehicle are positive, in reference
to ground or non wired side,IF you talking about measuring

Current is opposite
Electrons flow neg to pos

Your Spark Plugs (Spark- jumps) from the ground strap to the
center electrode (current flow)

What your saying is your putting battery voltage directly to or at
a switch terminal & the window motor is good,but not the switching
or wiring side of circuit

Would be nice to have the factory wiring book ,wouldn't it

I never walk to any vehicle without one, if I have a volt meter in
my hand for any reason

Jul 22, 2014 | 1996 Chevrolet Blazer

2 Answers

I have a 97 chev suburban 350 and no power to the fuel pump ,new fuel pump,fuel pump relay fuse is new,checked all wiring no cracks or breaks all along from fuse s to pump all good,just when i turn key is...

I would interrogate the fuel pump relay socket with a voltmeter or test light. There should be one hot terminal from the ecm b fuse. There should be a terminal that has chassis ground for the relay coil. The positive terminal for the relay coil comes from the ecm when the key is on. If you have trouble interpreting the results of these troubleshooting steps, feel free to comment back. The circuit is on the right of the diagram about 1/3 down the page.


Sep 28, 2017 | 1997 Chevrolet Suburban

2 Answers

Electrical prblem

There would be a fuel pump fuse, either under dash or under hood. Check that fuse, use the test light to see if fuse has power. If not, then it might be a fusible link or maxi-fuse that feeds the fuse panel. If fuse has power with key on, pull the relay, and use the test light and probe relay terminals, key off. One terminal should be hot at all times. If not, check for power loss between battery and relay terminal-possibly a maxi-fuse or fuse link.
If relay does have power to terminal, quickly check other terminals while someone turns key to on-for about 2 seconds, another terminal should show power-this would be signal from computer to turn the relay on to prime the lines and fuel rail. If you have that, plug relay in and cycle key. Does relay click? If yes, relay is working and problem may be at fuel pump connector. If relay is not working, but you have power to it, and the short signal from computer is there, then check the relay's coil side ground. Computer signals the coil side and the signal goes to ground from relay coil side.
Pull the relay and use a jumper wire from relay's hot terminal to fuel pump terminal-the wire to pump from the relay. If pump comes on, the problem is right there at the relay-either no signal from computer or the relay coil's ground is lost. If pump does not come on, again check connector at pump-that or the wire to pump[ has a problem.

May 12, 2013 | 2001 GMC Savana

2 Answers

Put new battery in a month ago, now when i turn key on nothing happens, no dash indicator lights come and nothing happens when key is turned on

Possible errors are either incomplete or non-load generator ground connections between the engine and car body.

Mar 04, 2011 | 2003 Chevrolet Silverado 2500HD

3 Answers

I accidently put my power wire into ground terminal and ground wire on power side for a second and it sparked. The amp power light still comes on but the sub barely movees. Is there any way i can fix this...

No,your amplifier probably has damaged power supply transistors as a result of improper power connections,contact eric @ Capital Audio & Electronics repair 850-339-1130 in Tallahassee,Fl-we repair all namebrands & all models

Mar 17, 2010 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

Car wont start

test light on neg with key on power at both sides of coil ???? next test light on bat plus put to coil neg and have somone turn car over if test light flashes and still no spark coil is bad if test light no flash ignighter is most likely bad the ignighter switches ground on your coil for spark

Dec 23, 2008 | 1994 Toyota Camry

1 Answer

No power to the amp i touched the power wire to the side of the amp

It probably burned a trace on the circuit board.

With the amp hooked up normally and the head unit on (so the amp will have remote voltage), do you read 12v DC anywhere on the case of the amp (black meter probe on the ground terminal of the amp)?

If there is no voltage on the case, confirm that you have 12v on the B+ and remote terminals of the amp (black probe on ground terminal of the amp).

Aug 25, 2008 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

Amp problem

Are you sure that the terminal isn't shorted to the case of the amp?

If it's not, the amp probably has a shorted output transistor.

If you want to repair it yourself, read through the following page. It explains the basics. Let me know if you have any questions.

Basic car amp repair primer

May 15, 2008 | Lightning Audio b2.250.1 Car Audio...

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