Charging Problem
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Joined: Aug 2002
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Charging Problem
Guys...
I have a 1985 F-150 4.9 Standard trans, No A.C.
The problem I have is... I cannot get the charging system working. THe battery will drain after running a couple of days.
I did the following:
Replaced the battery - altenator - regulator - coil - negative battery cable - ignition module. It shows 12.1 volts at the battery by itself not connected, 21.1 volts when connected & running. I cleaned the negative clamp at the frame mount. Checked fuses, all OK.
Help!!
Thanks.
I have a 1985 F-150 4.9 Standard trans, No A.C.
The problem I have is... I cannot get the charging system working. THe battery will drain after running a couple of days.
I did the following:
Replaced the battery - altenator - regulator - coil - negative battery cable - ignition module. It shows 12.1 volts at the battery by itself not connected, 21.1 volts when connected & running. I cleaned the negative clamp at the frame mount. Checked fuses, all OK.
Help!!
Thanks.
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Joined: Jan 2001
Posts: 56,992
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From: Virginia
Charging Problem
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Get a test light or meter and verify voltages. You should have 12 volt on "s" when the key is turned to run. You should have 12 volts on "a" all the time.
Get a test light or meter and verify voltages. You should have 12 volt on "s" when the key is turned to run. You should have 12 volts on "a" all the time.
Posting Guru
Joined: May 2002
Posts: 1,306
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From: Bryan/College Station
Charging Problem
Sounds like the regulater is full fielding the alternator and then shorts to ground at the same time. I haven't heard of a Ford alt putting out 21+ volts though.
BROKEBRONCO
84 Bronco 351HO/C-6/208/10.25 Rear/D44TTB Soon to have D60 Front/NP435
86 F250 351HO/C6/10.25 Soon to have a front axle and the ZF tranny
BROKEBRONCO
84 Bronco 351HO/C-6/208/10.25 Rear/D44TTB Soon to have D60 Front/NP435
86 F250 351HO/C6/10.25 Soon to have a front axle and the ZF tranny
Charging Problem
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