Replacing Shift Tube Leads To Electrical Nightmare - Ford Powerstroke Diesel Forum
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Old 11-06-2013, 03:19 PM
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Replacing Shift Tube Leads To Electrical Nightmare

So last week I cracked my shift tube. I replaced it and after putting everything back together I noticed the turn signals had no response and made a horrible sounding buzzing noise whenever I would try to signal right or left. I traced the sound to the flasher relay. Well I bought the new relay today from Napa and the signal worked for a second then the buzzing sound came on again and the signal shut off. I let it sit for a minute then tried to signal right, it did the same thing. Then i signaled left and it worked... But only for a few seconds until it started buzzing and stopped working. After messing around a little more i figured what the hell I might as well try to start the truck to see if that will make it work and the truck wont start now! I really have no idea whats going on and I need the truck back on the road asap for my leaf cleanups. Any help is greatly appreciated thanks
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Old 11-06-2013, 04:37 PM
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Sounds like dead batteries.
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Old 11-06-2013, 05:27 PM
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I dont think it is because the starter tries to turn over for however long you put the key in for and it doesnt start to die down like it would if the batteries were dead
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Old 11-06-2013, 05:39 PM
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Ignore what isn't pertinent, but the difference between the first example and the second example is worth paying attention to.

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Old 11-06-2013, 06:36 PM
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Hm maybe you're right. Do you think that that would also have to do with the flasher relay?
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Old 11-06-2013, 06:42 PM
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Yes, that's why I suggested it.
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Old 11-07-2013, 06:04 AM
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The problem is likely the Multifunction SW because it has dirty contacts inside. The reason the relay buzzes is the contacts aren't allowing enough current to flow to supply the coil inside to remain solidly closed (intermittently).

Here's the test, when you hear that buzzing, try the turn signal. If it stops that's your problem! Usually the bad contacts are in the 4-Way SW up top. Because of it's location it collects dirt & dust that eventually interfere with good contact.

If that doesn't do it, monitor the system voltage for, possible, battery issues...
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Old 11-07-2013, 06:53 AM
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Thanks guys. So like an idiot i forgot that i took out a fuse for whatever reason while working on the truck earlier which caused it to not be able to start. I put the fuse back in and it started right up, and on the way to school today the turn signals somewhat worked. A couple times they worked fine, and other times it would work and then shut off an start buzzing again, but its on and off. Im guessing its a bad ground to the relay?
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Old 11-07-2013, 07:01 AM
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Did you read my post?

Am I just wasting my time here?

Bad Contacts IN the MFsw. Replace it, open it and clean-&-lube everything, or live with it. It's just annoying, not really hurting anything (except if your Signals stop working altogether)

You could also try turning the 4-Ways On/Off a dz times to wipe those contacts, might "cure" it for awhile...
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