2003 gt electrical problem.. :( - Mustang Evolution

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Old 05-25-2015, 04:59 PM   #1
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2003 gt electrical problem.. :(

So about 6 months ago my car stranded me, and I had the battery and alt checked, and battery had a bad cell, and alt was done for, replaced both, and ran fine for like 3 weeks, then new alt went bad, then the camshaft positioning sensor go bad, I've had 4 alts go bad on me in 6 months, they keep burning out, except for one, on one the bearings went out. And in this time, I've had a fog light blow, my cig lighter stop working, all my speakers besides the top front tweeters stopped working completely, and I checked all the fuses, all the wires I can find, all the connections are plugged in, idk what to do! It won't charge the battery at all, and it keeps stranding me. I've unplugged the amps in the rear, the radio is unhooked completely the convertible top pump is unhooked, hoping to weed out a short, I checked all the ground wires I could find. I'm lost! Someone help please!


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Old 05-25-2015, 07:09 PM   #2
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*bump*


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Old 05-25-2015, 07:41 PM   #3
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Man that really sucks! Hunting down electrical problems is a pain. I'd try to find an electrical schematic and start tracing wires. I can't help too much in this department but I'll give you another bump so more people can look at your thread.


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Old 05-25-2015, 07:43 PM   #4
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replace all your fuses and relays. also check all your ground wires.
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Old 05-25-2015, 07:58 PM   #5
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Checked all the grounds, all my fuses are good, where do I get new relays?


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Old 05-25-2015, 07:59 PM   #6
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just take some of the relays to any auto parts store, it sounds like your car has been struck by lightning
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Old 05-26-2015, 04:24 AM   #7
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It's probably a bad batch of alternators you are buying or installing them wrong. Try getting a new alternator and battery make sure you install everything before you hook up the wires on the terminals, I would check grounds also. Make sure the battery is grounded and all terminals on alternator, battery terminals, and all grounds are tight.


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Old 05-26-2015, 12:47 PM   #8
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Rebuilt parts from Mexico aren't the highest quality and I would check any and all splices again, and hunt it down wire by wire. Unless the car has taken on water in some form or fashion this makes no sense unless a wire is fouling things out somewhere on the vehicle. Electrical isn't my strong suit but I would check the wires themselves.
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Old 05-26-2015, 07:37 PM   #9
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Bummer.


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Old 05-27-2015, 07:55 PM   #10
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Ground wire could be broken underneath insulation. New alternators get smaller gauge (thicker) wire to main terminal. Corrosion is everywhere, a little, alot. Loosen wires, clean, scrape ends of wires, re tighten.
Take a close look at the "main terminal block" located under the fuse box, has 2 red (hot) wires there, one supersized for the alternator. I also grounded the alternator with a wire from alternator bracket to part of frame.
If you have a multimeter with three wire lead prong holes, you can check DC v amperage and identify the trouble spot.
-If it runs odd at idle, hook up a set of jumper wire cables from a vehicle with a strong charging system. See if there is a difference.
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Old 05-29-2015, 04:25 PM   #11
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2003 gt electrical problem.. :(

So I went and got a new alt and battery yesterday, my new battery I got in January had a bad cell. And when I changed the alt I saw this, what the hell is it? A regulated ground of some sort? Because it looks like it's not working. Click image for larger version

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Old 05-29-2015, 07:03 PM   #12
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That is nothing more than a ground connector, although it appears the wire has been pulled and the copper wire is now exposed still not a big problem.

Take a meter and check for continuity from the wire to the engine block if you have continuity all is well
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Old 05-29-2015, 08:04 PM   #13
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I don't have a multimeter/: and if it's not connected anymore.. Would I be able to just connect the wire right to the engine?? Why is the black little box needed if it's just a ground?


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