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Hello fellow focus owners and enthusiasts glad to become a part of this forum/community. So, my wife bought a 2012 Ford focus mk3 which she loves, and I like driving as well, to be honest I didn't think that I was going to be a fan at first but once I drove it, I fell in love with it. unfortunately, I neither me or my wife have been able to drive it this winter it's just sits outside in the driveway looking all sad and neglected. This is due to my Wifes brother, he wanted to prove to me that he knew how to install a cd player, some subs and an amp. I told him that I had hooked up a few before so I didn't need him too, however my wife begged me to let him do it because he was trying to make a good impression on me or something like that. Against my better judgment I let him, he didn't get the after-market wiring harness adapter that just plugs straight into the factory plug, instead he cut the plug off and spliced his own wires, the cd player worked but stayed on after the car was off all the time. He tried to find a 12-volt switched wire behind the fuse box underneath the glove box, he cuts some wires, and something sparked he said. I spliced the wires back together, replaced any fuses that had blown, pulled the relay and checked it but still could not figure out why the heater blower stopped working along with the headlamp switch, it does nothing. Luckily for me the ford has daytime running lights, so the lights work even though the switch does nothing.... Any advice or pointers you might have would be greatly appreciated, and my focus would be grateful as well. I'm not mechanic I only have basic knowledge, but I can't afford to take it to a shop, and neither can my wife's brother thank you...
 

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OUCH…

Is your wife’s brother going to take any responsibility for this goat rope or is it all going to fall on you?

Only thing I can suggest is to find a shop and split the bill, to keep some sort of peace in the family.

Good luck.
 

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Perhaps just age, but I needed only reading a 1/3 to reply. First off, your continued calm and patience evident through coherent communications here, plus proper spelling, grammar and punctuation, already tell me you realize the value from allowing your BIL to continue living is worth 1,000x more than anything it costs to recover your wife's car to pre-butchered status.

2.) Simply call Crutchfield and see if they have your factory plug end. If so, just reconnect to the cut wires matching colors to restore to an intelligent baseline. If they don't then go to the dealer or look to online suppliers like RockAuto if they have the factory end. Then, get the adapter harness as would have been intelligent in the first place. Crutchfield's directions are of the quality that gives me indication you'll do quite well finishing up on your own.

3.) Do not under any circumstances let her brother near the car. Ever again. For anything.

I caught that you ran down some blown fuses which is good. For big power draws like blower and lights you know about the relays, in both inside fuse box and another in an exterior fuse box under the hood in case you did not check yet. One trick to check them is to find an EXACT same one in the fuse box and temp swap to confirm they do/don't work. The real fear if confirming all fan-related relays are working (I'd just buy them new - can't be more than $6 ea.) is that the blower module is fried. It's not just a resister coil for $20 anymore like the old days. It's more like an epoxy embedded circuitboard for $200 from the dealer. Ebay (even Rockauto or CarID.com) will have them new or used for alot less.

Finally, you're wise not to use a shop for more than just money reasons for this kinda diagnostic hunt n pecking. Do a simple cheap online short term subscription to alldatadiy.com or alldata.com/diy IDR for access to a .pdf of the official factory service manual for her car. good luck.
 

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Check the blue plug next to the fuse box on the passenger side. It it comes loose it will cause this exact problem and it is very easy to bump out
Post is more than a year old and would think he has it fixed by now , But the suggestion is good and known fault usually caused by getting hit by passengers feet
 
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