NEED HELP....BATTERY PROBLEM
#1
NEED HELP....BATTERY PROBLEM
Hey everybody, I've been having problems with my battery. I bought a new one a while back for my 88 mustang and it seems to be drained everytime I let it sit for like 5 days. I changed the battery cables thinking it was that but its not and I'm not sure what else to check since I am new to cars. If someone could give me a few ideas of what to check it would be greatly appreciated
thanks
thanks
#5
Hey,
Sleeper is right (again lol). You can check the battery for parasitic drain by using these following steps (I cut and pasted these from a website as it does a better job in explaining the process than me typing it out).
1 - Remove the negative side battery cable from the negative battery terminal.
2 - Attach an ammeter (this measures amperage) between the negative cable and the negative battery post. Wait a few seconds to several minutes for the car to go into sleep mode - i.e. when you make the contact with the ammeter, the cars computer systems "wake up". After a bit of time they will go back to "sleep".
3 - If the ammeter is reading over 35 - 50 milliamps, something is using too much battery power.
4 - Go to the fuse panel(s) and remove fuses, one at a time. Pull the main fuses (higher amp ratings) last. Be sure to observe the ammeter after pulling each fuse.
5 - Watch for the ammeter to drop to acceptable drain. The fuse that reduces the drain is the draw. Consult the owners' manual or service manual to find what circuits are on that fuse.
6 - Check each device (circuit) on that fuse. Stop each lamp, heater, etc. to find the drain.
Hope this helps.
I know the OBD2 computers may use a drain between 50 and 70 miliamps (i found this out in my electrical diagnosis class) so i would assume anything over 35 milliamps is an issue on the OBD1 computer.
Sleeper is right (again lol). You can check the battery for parasitic drain by using these following steps (I cut and pasted these from a website as it does a better job in explaining the process than me typing it out).
1 - Remove the negative side battery cable from the negative battery terminal.
2 - Attach an ammeter (this measures amperage) between the negative cable and the negative battery post. Wait a few seconds to several minutes for the car to go into sleep mode - i.e. when you make the contact with the ammeter, the cars computer systems "wake up". After a bit of time they will go back to "sleep".
3 - If the ammeter is reading over 35 - 50 milliamps, something is using too much battery power.
4 - Go to the fuse panel(s) and remove fuses, one at a time. Pull the main fuses (higher amp ratings) last. Be sure to observe the ammeter after pulling each fuse.
5 - Watch for the ammeter to drop to acceptable drain. The fuse that reduces the drain is the draw. Consult the owners' manual or service manual to find what circuits are on that fuse.
6 - Check each device (circuit) on that fuse. Stop each lamp, heater, etc. to find the drain.
Hope this helps.
I know the OBD2 computers may use a drain between 50 and 70 miliamps (i found this out in my electrical diagnosis class) so i would assume anything over 35 milliamps is an issue on the OBD1 computer.
Thread
Thread Starter
Forum
Replies
Last Post
Seanam
V6 S197 General Discussion
5
10-04-2015 10:15 AM
stangin1996gt
4.6L (1996-2004 Modular) Mustang
0
09-21-2015 11:01 AM