Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hello. Do you have a volt meter to check the voltage of the battery and also a few other spots to see what may be happening to the voltage ?
Ok also it's possible you are on the right track but even a new part like the alternator is bad. So never think cause it's new that it's ok.
Also is your battery top post or side post ? I know optimas have both but which one are you using ?
Ok. And don't take offense but you did remove both top battery terminal covers right ? Most times the negative lead comes with a cover on the post. Some over look this Cover.
Well we need a meter so do what you have to do :)
Ok :) just had to ask man.
Ok do you know how to use one ?
That's good enough.
Meter set to DC volts if you have more than one setting out it near 20 volts so we have 2 spaces before the decimal point and hook red to pos and black to neg see what voltage is right now with no jump.
Ok will it start ? If so start it and see what the voltage is
If need be start it with jumper cables and let it run for a minute or so , remove the cables and check voltage then
Ok alternator is not charging.
Now put red lead on the meter on the power wire from the alternator while the black lead is still on negative and see what the voltage is
What engine do you have I am going to check a diagram
Give me a few minutes
Ok what color wires are on your alternator
Yellow , brown and light green ?
Actually brown should be orange. Sorry
That would be a up charge. I have the answer providing we have the same color wires
ok power should be on white and also orange. Check those with meter same as we been doing
It's on to use jumper cables on the battery to get the voltage back up. So no worries
Also the big terminal should be the yellow wire with white stripe. So you will only need to check that wire and the Orange wire for battery voltage.
Here is the test so you can see it
I am guessing no power on the Orange wire. If I am correct you have a bad fusible link.
Ok now what about the big wire on the alternator it is yellow yes ?
Well it appears in the diagram it does not go straight to the battery. There is a junction block that it goes to. So we need to verify power on the wire at the alternator per the test I sent you. Did you click the link ?
You should be able to unsnap the plastic cover on the wire or just poke the test lead through the wire insulation.
It is ok to remove the wire to test but if you can access the nut to remove it then I don't see why you can't use that as the test source
I'm having trouble locating the junction point and the fusible links locations. So this may take some physical inspection. Need to follow the red wires off the battery terminal. Do they go to a starter solenoid or something ?
Ok man. Sounds like tests are good. Alternator is faulty. First thing I would do is remove it and have the parts store test it. BUT does the battery light come on in the dash ? Does the dash work fine ? The instrument cluster is what I'm talking about
The wire that activates the alternator regulator is the light green wire with red stripe and that comes from the instrument cluster so we need to verify cluster is ok and fuse 45 is ok
Ok. I'll send over the wiring diagram hopefully you can make sense of it
Ok and what about fuse 45
Ok also check the light green wire with the truck off and with it running to see if the voltage changes on it that will be the nail in the coffin.
Jumper cables won't matter in the test so no worries. They can stay on
Ok sounds like problem is with that wire. That comes from the instrument cluster.
From my information. When the car is started the power comes from the cluster to power the battery light and then to excite the regulator to allow it to function. So if we have no voltage on that wire then that is a issue why the alternator is not charging. I am going to check another test.
Yes but mileage won't be the same. Let me confirm the issue is with the cluster though
Ok I am correct. The cluster powers the wire. So here is what we need to do. By we I mean you :) , you need to remove the cluster and we then check the wire at the cluster if the wire is ok at the cluster you will run your own wire from the cluster to the alternator and it will be fixed. And we forget where the failure is at cause it won't matter. All we do know is that the issue is with that wire. So we need to remove the cluster and check pin 12 it will be that wire. Hopefully there is only one connecitr. If not let me know but that wire will be specific so you shouldn't find more than one of the same color. Hope this makes sense. Let me know what you find !! Please take a second and click the box and rate my service GOOD OR EXCELLENT SERVICE if you feel I have been helpful and please request me in the future. If you feel I have not been helpful please DO NOT RATE BAD OR POOR AND WASTE YOUR MONEY , I will opt out to see if another expert can provide more or better assistance so you're not wasting your money!!. Thanks for choosing just answer. Lou. also , if you feel i deserve one , BONUSES are GREATLY APPRECIATED ! 😉 Keep in mind then when you rate it does not end our conversation. you can still return here to me for follow up information if needed, Lou.
Yes the wire should match in pin 12 of one of the connectors I'll see if I can get a breakdown
Ok it's a corner pin of the black connector on the cluster
And shoot me in the foot lol but there are two of the same wires in pin 11 and 12 so it will be the corner wire the pins are numbered 1-6 on the part near the connector release and 7-12 on the bottom.
Let me know what you find but this should be the fix once you determine the wire is ok at the cluster. If it is run a wire from the cluster to the alternator. If it's not you need a cluster. Let me know what you find and done order to rate :)
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