Prefuse Box Removal and fuse replacement Mercedes Benz C250/W204

  Рет қаралды 133,510

Ginco

Ginco

6 жыл бұрын

As some have said, do not rip the yellow pyrofuse out of the box. Pry the orange part up first, and then it will remove easily.
If you’ve burnt out one of your fuses in your prefuse box the dealership will try to sell you the entire prefuse box which will probably be around $200 to $400 including installations. I’ll show you how to open it and replace the burnt out fuse.
Mine burnt out because I was installing a subwoofer amp and mislabeled my ground and power wire, and had an inline fuse at 100w which was too much for the 80w fuse I had it hooked up to, and blew the prefuse box fuse instead. I figured out the problem because the entire back / rear of the car was dead due to the rear fuse box receiving no power. The car didn’t start because the fuel pump wasn’t receiving power.
Before you do this, make sure that you test every possible fuse and connections to make 100% sure that the prefuse box IS the problem because it’d be a huge waste of time to go through all this and for your battery to be bad or something stupid like that.
If this doesn’t work or you screw up your car worse it’s not my fault. This worked for me.
Link to fuses: a.co/4GsAd1p
Name of fuses in case amazon link goes down: Blue Sea Systems AMI/ MIDI Fuses

Пікірлер: 88
@nattyk672
@nattyk672 4 жыл бұрын
When disconnect plug from the pyrofuse you must lift the orange safety portion of the plug, don't use pliers and force !
@ginco_bnz
@ginco_bnz 4 жыл бұрын
Rob Bob thanks for the info, I tried for like 20 minutes to remove it.
@chrometwourdome1
@chrometwourdome1 4 жыл бұрын
I wish I would’ve read this prior to me using pliers...mine will not fit back in. I have ordered a new yellow squib connector at the cost of $70. It’s a simple easy connector to push up and remove. A panel remover tool is the best tool to pry it up and off. Please edit this video. Hard way for people to learn. Everything else was helpful though.
@ginco_bnz
@ginco_bnz 4 жыл бұрын
chrometwourdome1 it’s in the description and pinned top comment, can’t really edit a video.
@dwaynezimu9861
@dwaynezimu9861 Жыл бұрын
How do you lift it ?
@jerrymont2595
@jerrymont2595 5 жыл бұрын
Thanks GINCO ! I was wondering why my C240 had power at the PreFuse box but most of my fuses in the other boxes aren't receiving power. I suspected a high powered starter fuse or Starter relay. I will once again check my fuses then test all my relays then I will check the PreFuse box. Once again thanks, your video was definitely needed for the Mercedes owners.
@ginco_bnz
@ginco_bnz 5 жыл бұрын
Jerry Mont No problem, glad I could help.
@Vasetousa
@Vasetousa 4 жыл бұрын
How do you test the relays?
@johnndlovu469
@johnndlovu469 11 ай бұрын
​@@ginco_bnzHi there from South Africa. Will anything go wrong if swap around the two wires on top that are fastened with the 10mm spanner?
@johnndlovu469
@johnndlovu469 11 ай бұрын
​@@ginco_bnznot sure which one goes where after removing them
@mnemo70
@mnemo70 5 жыл бұрын
Interesting video, thanks! For others: This is the pre-fuse box F32 (Vorsicherungsdose). It also contains a relay that, when faulty, can cause all kind of weird fault messages when turning power on in the car. Fault code B214B72 / A14B72 can be a hint for this.
@ginco_bnz
@ginco_bnz 5 жыл бұрын
mnemo70 Yeah, no one had a video for opening this up, and a lot of people on forums wouldn’t touch it because it’s non-serviceable. It’s really just a few fuses and relays, nothing crazy about it, no need to be afraid of it.
@KashNupe
@KashNupe 5 жыл бұрын
Yea my relay is faulty can it be replaced alone or the whole F32 box has to be replaced?
@frankbury3216
@frankbury3216 Жыл бұрын
Thank you
@robertrobbins5618
@robertrobbins5618 3 жыл бұрын
I have a question I have a CL500 2003 Mercedes I'm trying to find out what powers pin 30 on the starter relay what wires that's going to the fuse box under the seat
@olawuyijoseph4000
@olawuyijoseph4000 4 жыл бұрын
Very easy to get
@chrometwourdome1
@chrometwourdome1 4 жыл бұрын
DO NOT REMOVE THE YELLOW CONNECTOR AS SHOWN!!! Pry the top part off and it will come off easy!
@ginco_bnz
@ginco_bnz 4 жыл бұрын
yeah, its the pinned comment.
@dwaynezimu9861
@dwaynezimu9861 Жыл бұрын
Pry it of using what ?
@jordan9299
@jordan9299 2 жыл бұрын
Where do you find the grouped fuses?
@Norseman220
@Norseman220 3 жыл бұрын
I think this is a crappy design by MB. I had the airmatic compressor fail, and it blew a fuse in the prefuse box at the same time. Instead of having a normal fuse in the power supply it just doubled the price of the repair. Thank you for the video Ginco. Now i will repair the old box and have as a spare.
@ginco_bnz
@ginco_bnz 3 жыл бұрын
I agree, it is a pretty dumb design. The chances of the car having a major fault that would blow one of these without blowing other fuses is very low, and the fact that it’s supposed to be irreplaceable is dumb as well.
@charlitolson7316
@charlitolson7316 Жыл бұрын
Hi mate ,I have similar problem with my w212. My compressor stop working when my battery was flat. I tested with star diagnosis and I have two fault codes . Valve on compressor could be a issue , and 2nd fault is level pressure air valve between air struts. I can hear sound from compressor when is tested by star diagnosis. Do you remember what was symptoms in your car? Can you help?
@Norseman220
@Norseman220 Жыл бұрын
@@charlitolson7316 On mine the compressor had locked up an drawn too much current resulting in a blown fuse. There is an air filter on the compressor air intake that is often neglected. this can cause the compressor to draw dirty air and wear out prematurely. Also the intake hose can crack and give the same result..
@charlitolson7316
@charlitolson7316 Жыл бұрын
@@Norseman220 thank you for your answer mate. I’m still fighting lol
@moshoodorire801
@moshoodorire801 4 жыл бұрын
Thanks for sharing your knowledge! Please I have a problem with my Mercedes w204 2009 320 4matic. After going through water flood, the AC stop blowing cold and compressor wont start, when I check the compressor it work manually and ac blowing cold. All fuse are good, do you think my problem maybe in the Prefuse Box? Many thanks.
@ginco_bnz
@ginco_bnz 4 жыл бұрын
I don’t do HVAC so I have no idea.
@glasser2819
@glasser2819 3 жыл бұрын
Simply use a ODB2 SCANNER to figure what DTC are active. Without a scanner you can't guess anything.
@FEAdeES
@FEAdeES 3 жыл бұрын
I hope you see this video, how exactly do you test fuses while this box is still installed in the engine bay? You mention this at 5:04 that you figured out already which fuse was blown while in the car. Thanks
@ginco_bnz
@ginco_bnz 3 жыл бұрын
Use a continuity tester and test from a the battery positive to the screw terminals on the side of the fuse box where the wires plug in to.
@AndyTomes
@AndyTomes Жыл бұрын
What is wiring for sam power module?
@charlesagha5261
@charlesagha5261 3 жыл бұрын
I don't understand the instructions at the beginning. Shouldn't the voltage at the fuse box be 12V? So how can you do a continuity test between HOT 12Vs and battery negative? Wouldn't that result in a short circuit?
@ginco_bnz
@ginco_bnz 3 жыл бұрын
You are correct, I should have said to disconnect the positive wire and test by connecting the multimeter to the positive battery clamp. However, I think it’s pretty obvious you should completely disconnect, even remove the battery before doing anything involving fuses.
@briandias1082
@briandias1082 11 ай бұрын
@@ginco_bnz yeah i was thinking the same thing and i did what he said now i shorted my car i wish he wouldnt post stuff that is wrong
@jamescarrales8138
@jamescarrales8138 5 ай бұрын
I know this video was a few years ago. Do you have part numbers for all the fuses in side the Pre Fuse Box? Really need the information on the 7 terminal orange fuse and the 3 blade orange fuses that are connected to it?
@ginco_bnz
@ginco_bnz 5 ай бұрын
At that point just buy a new prefuse box.
@commonwealthclick7210
@commonwealthclick7210 3 жыл бұрын
On a w203 can the prefuse cause the engine fan not to work I’m getting 14volts with the car on everyone but the power wire to the cooling fan and there’s a coolant visit workshop on the dash and a p2073 fan code on my mb scanner and I put 2 fans in it
@Swarren0907
@Swarren0907 Ай бұрын
Did you ever find an answer. I have this exact issue. I can’t get my AC to turn on and I’ve noticed the fan no longer blows
@olawuyijoseph4000
@olawuyijoseph4000 4 жыл бұрын
Actually I'm a rewire and I'm going interesting in this lecture so I will like to know if there is type use to lecture people just for me to be inform anytime of lecture so can be a partaker. Thank you
@AndyNav1
@AndyNav1 2 ай бұрын
Where is the location of pyrofuse on ML500?
@robertrobbins5618
@robertrobbins5618 3 жыл бұрын
I'm not getting no power I blew a fuse the starter relay I know it's probably a short somewhere but I cannot figure it out I cannot power my seats up to move them out to get the carpet up to get to the back fuse and the wires under the carpet
@PaulPaid
@PaulPaid 3 жыл бұрын
Try changing fuse 59. Worked for me. Also make sure your pyrofuse on the battery terminal is not blown.
@lancesebastian6767
@lancesebastian6767 Жыл бұрын
I have a e350 coupe base model 2 door trying to replace the pre fuse box. Any help would be greatly appreciated
@ginco_bnz
@ginco_bnz Жыл бұрын
Lol what help am I supposed to give? If this video isnt good enough you need to take it to a shop, if you're inexperienced you will damage the car more.
@Casiel
@Casiel 5 жыл бұрын
Hi Ginco, what is the yellow plug for? I need to know asap please!
@ginco_bnz
@ginco_bnz 5 жыл бұрын
Some sort of sensor. Don’t know what it is.
@glasser2819
@glasser2819 3 жыл бұрын
it is a "piro fuse" in case of accident the computer can decide to cut-off all power.
@Vasetousa
@Vasetousa 4 жыл бұрын
Hi. I just checked as you suggested in the video. There is no beep with either terminal. the car runs normally. All systems go. All 3 points show battery voltage. I assume you check it while a key is not on contact? I still have "Fault code: A19116 Fault: The power supply of circuit 30g is outside the valid range. The limit value for electrical voltage has not been attained, Fault code: A10C16 Fault: The power supply is outside the valid range. The limit value for electrical voltage has not been attained." and some others. No check engine or other codes. What does that mean?
@ginco_bnz
@ginco_bnz 4 жыл бұрын
I don't know, I'd recommend taking it to a shop.
@georgewu5666
@georgewu5666 2 жыл бұрын
This is a very good video. I helps me a lot to understand why there is no power supply to a lot of my devices in my 2013 Mercedes GLK250 after jump start. I suspect I have some fuse blown in the prefuse box. I don't quite understand why it suppose to have continuity between ground contact and the other contacts. In between, there suppose to have a battery, isn't it? Or, do you mean check continuity when the vehicle is turned on?
@pskim75
@pskim75 5 жыл бұрын
I'm having some issues with a constant 12v after replacing my OEM stereo. It seems that the terminal that is closed to the windshield drops to around 1.5 volts a few minutes after the ignition is switched off and this causes my stereo memory to be erased. Most of the power, including lights, and seats are pretty much gone after this happens. The power resumes after opening the door or unlocking/locking the car though. When the voltage drops/rises, I hear a small pop or click just behind the battery. Seems like some thing is switching off after some time of the ignition going off. I'm not sure if this is normal or if the prefuse is bad. Could anyone check on their car to see if this is normal?
@ginco_bnz
@ginco_bnz 5 жыл бұрын
It’s normal. You need to find a proper constant 12v, yours is most likely wired to the cigarette lighter which is only on when the car is on. Find one that is constant or wire directly to the battery.
@edutu111
@edutu111 4 жыл бұрын
great video , do you know if there is a fuse for the alternator , thanks
@ginco_bnz
@ginco_bnz 4 жыл бұрын
check the fuse diagrams
@juanca122480
@juanca122480 5 жыл бұрын
How do you know about the problem its there..have problem c250 2013 the cluster
@ginco_bnz
@ginco_bnz 5 жыл бұрын
If the car doesn’t start and all of your fuses are working. Check the posts on the top of the prefuse box with a multimeter to see if they’re actually working.
@lukaszklimczuk
@lukaszklimczuk 3 жыл бұрын
Hello mate i would like to ask if thats instruction make sort out a error code of b2735-13,the squib for pyrofuse on board electrical network line has a malfunction.I really mad for this i couldnt erase it from memory.Many thanks
@aameral-ghazali2495
@aameral-ghazali2495 2 жыл бұрын
Hi brother, did u fix the error code? B273513, if u did please tell me how as I have the same code
@lukaszklimczuk
@lukaszklimczuk 2 жыл бұрын
@@aameral-ghazali2495 Hello.Yes I sort out a problem you have to buy resistor 1.6ohms and solder it to cable who is going to pyrofuse on (plus battery clamp),first you have dissconnect a battery.thats the way to sort it.Cheapest and more solid way.Problem is in that plug black yelow orange blue color.Some of connection is loosing when is a vibration from engine or different sources
@aameral-ghazali2495
@aameral-ghazali2495 2 жыл бұрын
@@lukaszklimczuk where did you solder the resistor exactly? And where the black yellow orange plug where the problem is?
@lukaszklimczuk
@lukaszklimczuk 2 жыл бұрын
@@aameral-ghazali2495 plug from pyrofuse and ends solder to each ending.
@aameral-ghazali2495
@aameral-ghazali2495 2 жыл бұрын
@@lukaszklimczuk can you show me a photo please
@mohammedrahmanrahman5024
@mohammedrahmanrahman5024 3 жыл бұрын
after replaceing the fuse do you need to program it to make it start?
@ginco_bnz
@ginco_bnz 3 жыл бұрын
no
@user-dn9kk9qu5y
@user-dn9kk9qu5y 6 ай бұрын
Is the pre fuse the pyro fuse ??
@ginco_bnz
@ginco_bnz 6 ай бұрын
No
@dennisarthurmathe7922
@dennisarthurmathe7922 Жыл бұрын
Hi ginco thanks for the video. But please help me. My W204 2010 I have low voltage next to nothing on the lower right side fuses most are 7.5amp those are powered by the red and white cable. And that cable has no power. I opened the prefuse all fuses are gud but I don't get current as from the beginning of the cable please advise me what must be wrong There
@ginco_bnz
@ginco_bnz Жыл бұрын
If you aren’t getting voltage from the beginning of the cable the cable is probably bad
@pierrebezuidenhout3033
@pierrebezuidenhout3033 3 жыл бұрын
I have a 2004 W211 E270 CDI auto and am looking for the front pre-fuse arrangement. Looked on the side of instrument panel and under footwell of passenger. Not what I am after. Am after the seriously rated fuses.The official Haynes manual is pathetic. Please help. Pierre.
@mr.mr400
@mr.mr400 2 жыл бұрын
why after I installed mine it says srs service required?
@ginco_bnz
@ginco_bnz 2 жыл бұрын
Check the orange plug on top
@mastiasavila6607
@mastiasavila6607 2 жыл бұрын
Good afternoon, I have a mercedes c300 2009, it did not want to start again, I have the high-beam light on, the srs light, the front and interior light does not turn on, the panel light turns on, it does not make a clip when trying to start it, some solution
@khalefhammaoui5749
@khalefhammaoui5749 2 жыл бұрын
Hi do you find the problem? I have the same rights now.
@tz0759
@tz0759 Жыл бұрын
Hello. It's solved ? Thx
@Shiesty9168
@Shiesty9168 5 ай бұрын
Good info, But would be nice if u actually stoped cutting off the video and show us exactly how u remove panels 👍
@ginco_bnz
@ginco_bnz 5 ай бұрын
If you can't figure out the in between you shouldn't be messing with the electrical system of a Mercedes.
@Shiesty9168
@Shiesty9168 5 ай бұрын
@@ginco_bnz I got it apart but man it was a hassle!💀, ur video did help a lot👌
@nv1493
@nv1493 5 жыл бұрын
Very useful, thanks. Please take this constructively - you don't need a silly repeating music loop.
@ginco_bnz
@ginco_bnz 5 жыл бұрын
Yeah lmao looking back I realize I should have left no music
@johnchow2702
@johnchow2702 4 жыл бұрын
Ginco very helpful video! So the three studs has to have continuity with battery negatibe point?
@ginco_bnz
@ginco_bnz 4 жыл бұрын
@@johnchow2702 yes. If they dont have continuity a fuse is most likely blown.
@jonny8257
@jonny8257 4 жыл бұрын
honestly i disagree . but to each their own :)
@OzcarMike641
@OzcarMike641 2 жыл бұрын
Just accept this for what it is...........
@logangreen7645
@logangreen7645 5 жыл бұрын
Are you Harry's little brother
@ginco_bnz
@ginco_bnz 4 жыл бұрын
GREENY4289 Yt what? Who’s harry
@logangreen7645
@logangreen7645 4 жыл бұрын
@@ginco_bnz your brother bro
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