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06-25-2004, 01:02 AM | #1 |
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Power Drain
I havent started the truck in a week and a half. I go out and turn the key nada. Put my multimeter on the battery and guess what 9.25 instead of 12. Put the charger on for an hour and a half and he fires right up. I saw the faq regaridng key drains. I unplugged everything from the fuse box except for the fuel sending unit. Is there anything else that I could try?
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06-26-2004, 02:39 AM | #2 |
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06-26-2004, 03:06 AM | #3 |
Designated A-hole!
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With everything unplugged are you still getting the drain?
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06-26-2004, 08:27 PM | #4 |
Franko72
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sounds like a bad battery. put a charge on it and take a reading after the charge cycle.How old is the battery?reconnect the battery and start the engine and get a reading of your charging circuit.If both are OK you will have to pull fuses one at a time to check for shorts in the circuits at the fuse block.could be a voltage regulator or an alternator not completing the charge pattern also. sounds like an old battery that needs replaced.
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06-26-2004, 08:35 PM | #5 |
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There's a Diode inside the alternator that occassionally goes bad, It will charge in a normal manner, everything does what it's supposed to do ( charge well) then it drains the battery when the key is off..
You can do somewhat a test at home without diagnostic equipment, Just charge the battery then Unplug all wires from the alternator and let it set a few days. But it's faster and free to have it checked. |
06-26-2004, 10:52 PM | #6 |
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Krue: Yes everything is unplugged from the fuse box minus the fuses. I will try unplugging the alternator.get a reading and then check again tomorrow and see what happens. I will post back what I find.
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06-26-2004, 10:59 PM | #7 |
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Why not just unplug the +pos. cable on the battery when you store it? I do minew every time it goes into storage for more than a couple weeks.
BUT it definetly is a good idea to figure out why it drains.
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06-27-2004, 09:28 AM | #8 |
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Have the same issue, checked all the wiring seems to be right.
Net will be the alternator.
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06-27-2004, 01:29 PM | #9 |
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Try checking the fusible links at the front of the engine compartment, they're in small black fuse holders. One is hooked up to a junction box on the passenger fender, and the other one is in almost the same spot on the drivers side. There's a really small 5 amp fuse in both of 'em. Not sure if that's the problem, but it's good to check 'em anyway.
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06-27-2004, 03:38 PM | #10 |
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unhook the positve cable put one lead of your voltmeter on the battery the other end on the battery cable it will read a voltage have a buddy start pulling fuses until the draw goes away it will read very low when you find the problem like well under .5 a volt. that test will get you looking in the right spot just check everything on the circuit that that particular fuse controls
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06-27-2004, 09:47 PM | #11 |
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It just so happens that I am going to have to do this now, since I have found that I have a key off drain since I put my engine back in the truck.
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06-28-2004, 04:44 AM | #12 |
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Found mine, it's the positive cable.
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06-28-2004, 07:38 PM | #13 |
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Bad cable hu? HMM. Maybe I will change mine out.
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06-28-2004, 08:47 PM | #14 |
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Got against the manifold.
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06-28-2004, 09:02 PM | #15 |
Got Light Emitting Diode?
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when i put my motor in i switched to a (used) newer style internally regulated alternator and put an electric fan on it. i got a key off drain about two weeks later. i took my alternator in to autozone and they said it was fine. so i figured my battery just wasnt holding a charge anymore so i went out and con-ed the guy at the auto parts store to exchange my 3 year old optima for a new one (only a 1 year warrenty), killed my new battery. after 3 days of chasing wires i took it to a shop. my alternator that autozone said was fine wasnt. it charged fine, but it had a key off drain. the electric fan burnt the diaod up. so new 80 amp(i think) alternator, no problems.
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