Question about Kenwood KDC-MP438U Car CD/ MP3 Player

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I put the head unit in & blew the fuse. I need to know which fuse to change :)

Hi, i have a y reg. smartcar i put my own headunit in & blew the fuse for the radio. i need to know which fuse to replace? theres about 25. where could i get a diagram from? I dont have the instruction book - its got lost somewhere. any ideas?

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  • Anonymous Mar 12, 2014

    radio fuse blew in my nissan bluebird SSS 1997 and need to know what volt fuse to replace it with



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  • 61 Answers

If you take out the fuses one by one you'll be able to see if the fuse is blown. if there is no wire in between connecting the two pins that plug into the panel. fuse is blown.

Posted on May 15, 2009


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Why would my iron heart Lainey 212 combo amp combo be blowing fuses?

Because some component in the amp is failing/failed and drawing too much current. The amp needs a repair shop. Poking around without knowing what you're doing can expose you to leather voltage. Don't do it.

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My cars battery died, and when i turned the car on finally the head unit and my infinity bass link didnt turn on

Check the fuse in your car's fuse panel. If it is burnt then change. If it is still good, check the fuse on the head unit and amp.

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Live wire sparked against my headunit

probably shorted out the deck but try different deck if that works then your old deck is shot but i have had amps do the same thing and i just changed the ground on it and they still work fine

Jul 08, 2012 | Alpine Cars & Trucks

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I have 2 15 in memphis speakers and a 1200 watt xplod amp...all of a sudden my head unit fuse blew so i changed it,it blew again, so i used a 15 fuse instead of a 10 so now the head unit works but the...

Sounds like a grounding issue. Check all groundings from the amp and make sure the ground and a hot wire is not touching. If not, it is probable a bad amp or your reduction in ohm rating is probably too low for the speakers. Amp to speaker ratio.

Apr 14, 2011 | Car Audio & Video

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How to hook up a kenwood amp.kac-5204

All amps are basicly the same. It should be plain as day where the speakers connect to.
The 12V screw connects to the main power from battery, be sure to fuse that wire and use a proper size wire, thicker is better,I suggest at least 8gauge with 40amp fuse. The GND is ground and should connect to car metal, file paint for soild connection. The REM is remote and connects to the remote of headunit or if you have a stock deck to the acc of car found in wire harness of headunit. Plug in the RCA's to head unit, or get a converter to plug into speaker wires from car if you have a stock headunit.

Mar 22, 2010 | Kenwood KAC-5204 350 Watt Max Power Stereo...

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Good day, I have a Crunch P2200 Powerzone.Lately,my fuse from my dc12v source bursted but the fuse on my P2200 was intact and okey.I later found out that R550 was burned (i dont know the value coz it was...

Hi mate i had similar problem my 12 volt blow all good i thought every thing worked after fixing but i noticed my bass was weak subs would still move a lot but not pump no real bass coming from them .After eliminating most things i hooked dvd player to amp with cd inside to test if head unit was outputing bass and i found that my head units bass out put had a cry but fuse in headunit was fine and i was fused in 2 spots from 12volt source new head unit and all good again hope this helps

Oct 19, 2009 | Crunch Powerzone P2200 Car Audio Amplifier

1 Answer

No Power coming to head unit..

u need to connet the pioneer black wire to the car direct .

Mar 26, 2009 | Pioneer DEH-P3800MP CD Player

1 Answer

Cant figure out my car audio problems!!!!!

There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

May 04, 2008 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

Clarion DRX9375r AM/Fm/CD Headunit optical output question.

I have the same HU and the same processor as you. First I only used the chinch cables to the processor, and from the changer.

The improvements you make; your headunit DAC and your chancher DAC wil not be used anymore. The differens; normal with a cd you convert a digitalsignal into analoge, in the HU or changer, and then you make it digital again in the processor, en put the signal analoge into your amp.

The advantage is; the processor uses the famous Burr Brown DACs and that is know by its good sound processing.

cheers mate

Jun 11, 2007 | Clarion DRX9375R

1 Answer


Check your ground wire! Relocate it to another place in the car and try to get a heavier ground wire aswell.

Apr 03, 2007 | Sony XM-2200GTX Car Audio Amplifier

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