Starting Problems..HELP!!!
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Senior User
Joined: Jun 2005
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From: Palo Alto, CA
Starting Problems..HELP!!!
Recently I had some starting problems on my 75 F250(360 motor). I replaced the battery, starter relay, voltage regulator, cables and alternator. I replaced the battery last. It ran just fine then I parked it for about a week and a half to do some body work and when I tried to fire it up I got nothing. I then jumped it and let ir run for about 20 minutes and turned off. When I tried to restart it I got nothing. My question is, is it possible that a new battery will loose its charge after sitting for a week and a half? Or am I looking for something else? Any help would be great, thanks!
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When you try and start it and get nothing... you mean NOTHING nothing, or weak "dead battery" cranking.
If nothing, I agree with bad connection wirebrush ground --> block.
If your battery lost its charge however (do you have a multimeter?) you might also want to see how much current it draws when just sitting.
If nothing, I agree with bad connection wirebrush ground --> block.
If your battery lost its charge however (do you have a multimeter?) you might also want to see how much current it draws when just sitting.
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Originally Posted by greybullit
I either get nothing at all or a buzzing noise from the starter sometimes, kinda just depends on how long I let it run for before shutting it off...
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From: lino lakes, mn
the only way to really test a battery is to chage it fully then do a load test it but as was stated before check your ground cable they get caroded just past the connection to the battery take a utility knife and cut back the insulation see if the cable is green if it is repalace it
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Wait a minute, in your original post you said you replaced the battery cables - were they replaced or not?
I'm not sure what type of multimeter you're using. Mine usually give a voltage number (11.50-12.65v). If your batter is totally dead I don't think it would be a connection problem, but rather an electrical drain somewhere.
I'm not sure what type of multimeter you're using. Mine usually give a voltage number (11.50-12.65v). If your batter is totally dead I don't think it would be a connection problem, but rather an electrical drain somewhere.
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Also, if you can jump it with a dead battery & it runs fine but doesn't charge your battery I would throw back on my old voltage reg and see if that fixes the prob. That's an easy snap connection. :-)
Really you need a multimeter.
battery charge while sitting & battery charge when running after being jumped to start with.
Really you need a multimeter.
battery charge while sitting & battery charge when running after being jumped to start with.
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Senior User
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From: Palo Alto, CA
yes, i did replace the wires so i think they are probably fine...yeah i think the meter i have is an old POS, I'll get one from my work tomorrow and test it again. If my reading is any lower than those numbers, it does mean I have a drain somewhere?
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From: Palo Alto, CA
okay, so i found a multimeter and i have 1.41v in my battery...now like i was asking before, is that a result of just the battery sitting there for a week and a half or is definitly a drain somewhere?
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Joined: Apr 2004
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From: Tucson, AZ
Maybe it's the ignition switch or trigger wire. Have you tried bench testing the starter.
If it's got a new relay then it's got to have a loose connection, faulty igntion switch, or bad trigger wire, assuming the bench test resutls of your starter are good. Use the ohm setting on multimeter to test for resistance in your ciruits and connections.
If it's got a new relay then it's got to have a loose connection, faulty igntion switch, or bad trigger wire, assuming the bench test resutls of your starter are good. Use the ohm setting on multimeter to test for resistance in your ciruits and connections.
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From: where the deer and antelo
A good new battery will not go dead in a week or several months for that matter just sitting. Sounds like you have a short in the wiring somewhere. With the battery fully charged and the truck running, measure voltage at the battery. You should have at least 13.5 volts, most I have seen read 14 or more. Shut off the truck and read voltage again, this time you will have about 12 or slightly more. If this checks out I think your charging system is good. If you have a new battery that is going dead after the above checks, pull the -(neg) terminal on the battery and read voltage from the neg post to the neg cable terminal. In a perfect world you would have 0 volts, but I suspect you will read several volts (up to battery voltage) showing a short in the system draining your battery. Note that a clock or some radios will draw voltage with the ignition off. You may have to disconnect them to get the 0 volts you are looking for.