OT I have a battery in my inlaws truck that goes dead from just sittting?
#1
OT I have a battery in my inlaws truck that goes dead from just sittting?
I know this is off topic but anyone have ideas on what could cause a drain on the truck. Its a 01 Dod#E, the only added option to the truck is an alarm with remote start. This has been in there for years!! Everything works like it should. Do you guys think think that the alarm is killing the battery? I was going to try to unhook it this weekend and see if thats it but any help would be GREAT>
#2
#3
Roger,
Sounds as if there is a draw on the battery. There are several ways to go about diagnosing it. First, lets start with the easy stuff, take a look at the glove box light, touch it...is it warm? If it is then it might be staying on. Do the same with the underhood light.
If it isn't something obvious like that then its time to dig a bit deeper. If you have a volt/ohm/ammeter or a test light you disconnect a battery cable and hook the meter or the test light in series between the battery post and the cable. Note: its normal for modern computer controlled vehicles to have up to a 50 milliamp draw on the battery.
I prefer the test light method...basically if the light lights then something is staying on. If the test light is really bright then its something big like a light bulb of some sort.....don't forget to disable the hood light if it comes on automatically when the hood is open.
The majority of the time a drain on the battery is caused by a light staying on. The draw will be fairly high in this instance......bright light on the test light....amp or so on the meter. If the light is dimmer or the reading is in the milliamps then its probably some kind of control circuitry...either computer, radio, alarm, etc.
Sometimes you can get lucky by pulling fuses one by one until the test light goes out (or the meter goes to zero) and that will tell you which circuit to start looking in (don't forget that the dome lights try to come on when you open the door...start with the courtesy light circuit fuse)
I hope thats kind of clear
Bobby
Sounds as if there is a draw on the battery. There are several ways to go about diagnosing it. First, lets start with the easy stuff, take a look at the glove box light, touch it...is it warm? If it is then it might be staying on. Do the same with the underhood light.
If it isn't something obvious like that then its time to dig a bit deeper. If you have a volt/ohm/ammeter or a test light you disconnect a battery cable and hook the meter or the test light in series between the battery post and the cable. Note: its normal for modern computer controlled vehicles to have up to a 50 milliamp draw on the battery.
I prefer the test light method...basically if the light lights then something is staying on. If the test light is really bright then its something big like a light bulb of some sort.....don't forget to disable the hood light if it comes on automatically when the hood is open.
The majority of the time a drain on the battery is caused by a light staying on. The draw will be fairly high in this instance......bright light on the test light....amp or so on the meter. If the light is dimmer or the reading is in the milliamps then its probably some kind of control circuitry...either computer, radio, alarm, etc.
Sometimes you can get lucky by pulling fuses one by one until the test light goes out (or the meter goes to zero) and that will tell you which circuit to start looking in (don't forget that the dome lights try to come on when you open the door...start with the courtesy light circuit fuse)
I hope thats kind of clear
Bobby
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Your best to use a voltage meter that can measure amps.It needes to be connected in series with one off the battery cables.All late model veicles have a small draw that will light a test light.No more then 80 millie amps.Any thing more then that will start to drain the battery.Set the meter up the read D/C amps.Disconnect the positive cable and hook one lead of meter to battery the other to the cable.Will then see how many amps it drawing.Becareful most meters are fuse at 10 amps and will blow the fuse in the meter if over that.I dont think your draw is close to that or the battery would be dead over night not after a few days like you said.Then you can start pulling fuse to see which circuit the draw is on.Beaware that when you open the door you will see a draw from interor light.If it has any aftermarket devices disconnect them first.They are more often than not the proplem.Hope this helps.Also have that new battery checked.
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