M210 Locker Blowing Fuses

[Brian_B]

Well, months later after being denied warranty from Ford, my supplier was finally able to get a new magnet from Dana/Spicer. Old one ohms 0-0.1 new one ohms 3.7-3.9.

I had two of them that exact same thing. Lead times on Spicer parts is rediculous.

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[Alecnavarro]

Why did Ford deny warranty? Because a dealer didn’t install?

Genuinely curious as I’m looking to stick to the Ford Performance brand for warranty reasons for most mods.

They claimed I fried the unit because I didn't use their harness that they sell separately which is nothing special. I wired it just fine using an OEM pigtail, but they wouldn't help at all. I believe my supplier actually had to buy the unit from Dana as they don't have any part of the warranty. BUUUTT, I just happen to own a full blown differential shop and can easily replace this. If I didn't have access to a full shop with differential knowledge, this would have been a terrible experience.

 

[Alecnavarro]

Well, to add to the frustration, this magnet came with the pin welded into the wrong spot.. had to machine a pin and weld it into the correct spot.

 

[Brian_B]

BUUUTT, I just happen to own a full blown differential shop and can easily replace this. If I didn't have access to a full shop with differential knowledge, this would have been a terrible experience.

Dang I needed to meet you a few months ago when I was tearing into my rear end every 6 weeks!

 

[Brian_B]

Well, to add to the frustration, this magnet came with the pin welded into the wrong spot.. had to machine a pin and weld it into the correct spot.

I noticed the P/N you had was for the rear end coil (10102021).

The m210 coil p/n is 10137577 according to this. Looks like the only difference is the location of the pin... and the fact that I can't find any place that sells it.

 

[Alecnavarro]

Welp I’m about to lose it. Got it all back together and replaced the wiring harness going from my switch panel down to the pigtail just as a precaution. POP! Now the unit reads 0.7 ohms.

 

[87-Z28]

Wow. That is very disappointing from the M210. Seems like QC is pretty lame.

 

[Brian_B]

I had one where I didn’t get the little plastic shim ring on the back of the coil, and that will cause them to blow for some reason.

 

[Snacktime]

@Alecnavarro I have one in the garage I might part with.

 

[Alecnavarro]

I had one where I didn’t get the little plastic shim ring on the back of the coil, and that will cause them to blow for some reason.

I wonder if that's what's happening?? I remember reading your post about that now, I didn't check to see if that came on the new unit.

 

[Alecnavarro]

Just found a picture where you can see that area, looks like it may be missing…

 

[Brian_B]

Yeah very silly that it doesn’t come pre-installed on a replacement part, and very easy to miss

 

[Alecnavarro]

Yeah very silly that it doesn’t come pre-installed on a replacement part, and very easy to miss

Guess I'll work up the motivation to tear it back apart lol

 

[Alecnavarro]

Just Wanted to update this. Broke A CV axle on the trail Saturday and since I had to tear it down for that, I decided to dive back in and replace the locker magnet AGAIN. This Time I made sure the isolator shim from the original was installed and made sure I put + to red coil wire. And She finally works!

 

[Techun]

New development. Friend brought better multi meter. Rear reads 4.2, front reads 0.00. Sweeeeett.

Damn. Now you have to fix the front and get a new meter

Edit. Oops that was a year ago

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