What is this wire for?
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Junior User
Joined: Apr 2003
Posts: 57
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From: Independence, MO
What is this wire for?
I have an 89 F-150 5speed with a 300 and I'm trying to figure out why my battery keeps draining overnight. There is a wire on the main engine wire harness that is frayed and broken. It is located on the driver's fenderwell and it's in the harness that is closest to the rear of the vehicle of the three that are there. The wire is black and it's in the pin that is 2nd from the right one and on top. I have attatched a link to a picture of it (kind of sucks, but hopefully someone can figure out what I'm talking about). What does this wire do?
There are a few things that don't work in my truck, maybee it could be for those. As always, thanks for any help someone can give me.
There are a few things that don't work in my truck, maybee it could be for those. As always, thanks for any help someone can give me.
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Junior User
Joined: Apr 2003
Posts: 57
Likes: 0
From: Independence, MO
What is this wire for?
Here's a link to the picture. sorry
http://forums.stangnet.com/attachmen...achmentid=1541
http://forums.stangnet.com/attachmen...achmentid=1541
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
What is this wire for?
What's the TRANS code from the door sticker: "E"?
Since the connector isn't plugged in, I doubt that's the problem, but Dennis (Mil1on) has posted a procedure for tracing a drain several times, so do a search in the electrical forum.
Since the connector isn't plugged in, I doubt that's the problem, but Dennis (Mil1on) has posted a procedure for tracing a drain several times, so do a search in the electrical forum.
Posting Guru
Joined: Apr 2003
Posts: 1,153
Likes: 1
From: Venezuela
What is this wire for?
Please double check what color is this wire, maybe you will need to remove a couple inches to uncover more wire and look the real color.
After that I can tell you what is this..
Regards;
After that I can tell you what is this..
Regards;
Thread Starter
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Junior User
Joined: Apr 2003
Posts: 57
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From: Independence, MO
What is this wire for?
I unplugged the connector to show you what wire it was. I think it's black, or just really dirty and it has a buldge like it's a fuseable link or something. It's on the other side of the engine as the alternator and the alternator seems to work fine. I think it might be something with the cruise control or possibly a fuel guage or something like that because neither of those two work.
Steve83: Not too sure on the door code since I don't think the sticker is there anymore. I think it has the mazda 5 speed though.
I was just trying to follow those wiring diagrams in the Hayes manual and I don't understand which of the 7 diagrams to even look at.
Steve83: Not too sure on the door code since I don't think the sticker is there anymore. I think it has the mazda 5 speed though.
I was just trying to follow those wiring diagrams in the Hayes manual and I don't understand which of the 7 diagrams to even look at.
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Junior User
Joined: Apr 2003
Posts: 57
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From: Independence, MO
What is this wire for?
Steve83 thanks for telling me about that article. I now have a pretty good approach at finding this short. Can I just hook up a volt meter between the battery terminal and the wire? Or do I need a test light or ohm meter?
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Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
What is this wire for?
A multimeter is the best investment. It can read voltage, resistance (Ohms), and can act like a test light (diode test buzzer). Without knowing what the circuit is/does, I can't tell you what to test for.
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Senior User
Joined: Jun 2003
Posts: 176
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From: Massachusetts
What is this wire for?
It may not be a short, it may be a legitimate load from something always on. I found my battery to always be weak after sitting overnight. Turned out my glove box light was staying on all the time. Faulty swtich. With a short ride to work and back, the battery was slowly dying. Could also be your brake lights stick on because of a faulty brake switch.
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