Killing new battery !!
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Senior User
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Killing new battery !!
Out of noware the truck battery is completely dead... So I replace
it because the old one was due. I clean up the connectors and (Ect.)
two days later the new battery is COMPLETELY dead.
So I recharge it and I go through the truck completely checking
all lights stereo amp. glove box Ect. And nothing is on or drawing
power but it still dies in two days what would be the next suggestion
I also took a volt meter to the battery and removed fuses one by one
and no voltage drop.. so I dont know what's next
Any help would be great.........Thanx
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Joined: Jul 2001
Posts: 237
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From: Clearwater USA
Killing new battery !!
First have you used a hydrometer on the new batt? Second have you tried removing the neg batt cable and put a test lamp between the cable and batt post to see if it lights up and if it does try your pulling fuses routine to see what is drawing the power. Hope this helps and Good Luck,
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
Posting Guru
Joined: Jul 2002
Posts: 2,205
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From: Vancouver WA
Killing new battery !!
Have you checked to make sure the alternator is working? Normal volt-meter readings should be around 12V or so across the battery when it's not running, and 13V - 14V across the battery when it is running. i.e. you should be able to see that the alternator is increasing the voltage when the engine is running.
Not sure about yours, but my '85 had a seperate voltage regulator that I had to replace twice because my battery wasn't getting charged.
Not sure about yours, but my '85 had a seperate voltage regulator that I had to replace twice because my battery wasn't getting charged.
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Killing new battery !!
With the motor off and key off. Take the battery lead terminal off of the alternator and check for a small amount of arching. If none, leave it off unless you are driving it. If the lead archs the alternator has suffered a spike and needs replacement. If the problem goes away with the terminal off, the alternator has a fried diode. DO NOT replace with a discount alterntor. Use new Ford replacement only.
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Killing new battery !!
Thanks fellow fordsters after 4 hours and no schmatic I narrowed
it down to the EEC relay sticking closed...
Best part was it's only a 15.00 relay from the parts house
Sweet deal thanks again for the pointers Jeff
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1987 - 1996 F150 & Larger F-Series Trucks
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May 6, 2010 09:29 PM
