Question about MTX Thunder 4250D Car Audio Amplifier

1 Answer

When i turn on my car my amp wont turn on?!

I just bought brand new 2 12 inch jack hammers and when i put them in it worked fine for the whole day then i turned my car off to go in a store and i came back in and my subs weren't playing?! thats when i noticed that my amp light wasnt comming on?!

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 1,498 Answers

Start with the basics:

  • Check the amp's on board fuse.
  • Check the in-line fuse for the amp's power supply.
If you have a meter:
  • Check the voltage at the +12v connect on the amp's power terminal
  • With the system on (or as on as it can be), check for voltage at the 'Remote' connect on the amp's power terminal - Is it +12v? If not,
  • Check the ground using the continuity or resistance option
If you have voltage to the +12v connect, try jumping it to the 'Remote' connect. It should light up.

If it doesn't, the problem is in the amp and a bit more difficult to track. Let me know if we need to take this to the next level.

Hope this helps,


Posted on Jul 15, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I bought a new jack hammer. After using it for a few hours grease started to come out where the bit is. Is this normal

No thats not normal real JACK HAMMERS on AIR ??? but its not Milwaukee not Bosch not Dewalt but a China brand? if you are have a real jack hammer then its not the right collum because its placed under Hammer drills? and you have also not possible speaking about maybe a little weight rotary hammer ? because ONLY real demolition and jackhammers are very specially made for the long lasting jobs !!! but the weight and power is very important by use the right tool for the right job the most rotary hammers ( exept brands like Hilti and Duss) are not made for long lasting jobs and are made for only working for a short time. its also makes the great price difference between a hammerdrill a rotary hammer a real demolition or a real jackhammer is much higher price. The tools on air Atlas Copco or Ingersoll for the hard and heavy jobs
If you have bought your tool by a hardware store and it is a real jack hammer go immediately back its possible that you are wrong informed by the seller or the budget was the fact. about the price for the tool maybe you have a real jackhammer but have choose a to little model size machine to do the job or its a budget brand online bought China machine. Its a simple question but a hard answer, difficult questions do not exist but difficult answers sometimes.
Regard and luck by warranty and a very small change maybe it is just only a factory flaw.

Apr 09, 2016 | Drills

1 Answer

Engine light on code is P0340

I had a brand new steering rack fitted by a mechanic, when he fitted the rack he forgot to connect the column, turned the steering wheel & said oops I forgot to connect the column, connected it all, tested it & it was fine, the day after there was play on the steering wheel, an inch left & an inch right before it steered, ive just got used to it now. But why would you say it was doing that?

Jul 03, 2014 | 2001 Ford Focus

1 Answer

I have a 2002 ford mustang gt.. Replaced the clutch bout 3 months ago.. New flywheel throwout bearing.. The whole works. Even purchased a clutch adjuster kit with firewall adjuster.. Car rides good and...

The cutch pedal should have about an inch of free play before contacting the pressure plate. otherwise throw out bearing will run continuously . It wont last long. Adjust at firewall for 1 inch of free play at the top of pedal stroke.

May 19, 2017 | 2002 Ford Mustang

2 Answers

Pyle Academy 2300 watt amp not working =(

wrap a striped speaker wire around the back of the rca out put on your cd player and for the record that aint a 2300 watt amp its like a 300 watt amp

Mar 30, 2010 | Pyle PLAM2300 Car Amp

1 Answer

1990 3/4 ton chevy 4x4 wont engage

the accuator is proby weak and working under pressure!!!!!

Jan 15, 2010 | 1991 Chevrolet K2500

1 Answer

I bought a brand new 42 inch plasma vi vo tv 2

New products do fail. The set should certainly be under warranty. I would speak to the dealer you purchased the unit from and see what they suggest. Don't remove the rear cover, or do anything else to give anyone a reason to void your warranty. Most brands are 90 days on parts and labor.

Nov 25, 2009 | Televison & Video

1 Answer

Alpine amp wont turn on..

your power wire is sufficating yor amp probably

Jul 29, 2009 | Kenwood KAC-8152D Car Audio Amplifier

Not finding what you are looking for?
MTX Thunder 4250D Car Audio Amplifier Logo

152 people viewed this question

Ask a Question

Usually answered in minutes!

Top MTX Car Audio & Video Experts


Level 2 Expert

150 Answers


Level 3 Expert

77932 Answers

Mark Skinner

Level 2 Expert

77 Answers

Are you a MTX Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides