battery drain
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battery drain
My 1992 aerostar has a bad battery drain on it
From full charge the battery is down in less than two days
with ground wire off of battery I put a test light between battery ground and engine ground and the test light is about half bright of normal./
Have checked all of relays by unplugging one at a time and have also removed each fuse one at a time with no change.
Doesn't have power locks or power windows.
schroder
From full charge the battery is down in less than two days
with ground wire off of battery I put a test light between battery ground and engine ground and the test light is about half bright of normal./
Have checked all of relays by unplugging one at a time and have also removed each fuse one at a time with no change.
Doesn't have power locks or power windows.
schroder
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battery drain
No battery stays up fine if i remove it from the cables in fact it is a new battery
and the one I took out is now in my pickup and doen't drain down in it so
It has to be something in the wiring.
Also on the other guys comment I removed the wires from the alternator and let it set a couple days and was down again.
schroder
and the one I took out is now in my pickup and doen't drain down in it so
It has to be something in the wiring.
Also on the other guys comment I removed the wires from the alternator and let it set a couple days and was down again.
schroder
Mountain Pass
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Mine is a 96 cargo version, it was doing the same thing. In my case some "courtesy light" relay was causing the problem. I found it by hooking up an amp meter with the car off of course then pulling fuses until the draw went away. Why I pulled one fuse I could hear a "click" in the back of the van. I had my wife listen to find where the click was coming from, it was a relay by the back doors (mine has split rear swinging doors). I pulled that relay and it solved the problem. I think it went to a dome light in the back. Probably was caused by a door sensor or something.
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battery drain
Originally Posted by ___
Mine is a 96 cargo version, it was doing the same thing. In my case some "courtesy light" relay was causing the problem. I found it by hooking up an amp meter with the car off of course then pulling fuses until the draw went away. Why I pulled one fuse I could hear a "click" in the back of the van. I had my wife listen to find where the click was coming from, it was a relay by the back doors (mine has split rear swinging doors). I pulled that relay and it solved the problem. I think it went to a dome light in the back. Probably was caused by a door sensor or something.
Mountain Pass
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Leave that relay unhooked in the back and see if it solves your problem like it did for me. Is yours a cargo van or a passenger van?
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Post Fiend
Joined: Apr 2005
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From: Washington state
there are as many as 7 color coded inline fuse links feeding 12v off the main batt. feed on the starter relay post on the driver side fender wall....
remove all 7 and jump from battery to each one in turn until you get same current draw brightness on your light tester then report back color of fuse line, we can tell u which circuit if you cannot locate
Ford Service Cd with wiring diagrams click
use Ford Truck .iso for your year
remove all 7 and jump from battery to each one in turn until you get same current draw brightness on your light tester then report back color of fuse line, we can tell u which circuit if you cannot locate
Ford Service Cd with wiring diagrams click
use Ford Truck .iso for your year
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Post Fiend
Joined: Oct 2005
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From: Kiev, Ukraine
Try to disconnect alternator only (both the connectors....). There are 2 versions!
1st: one ore more diodes are defective....
2nd: when ingniton is off, there is voltage on rotor bushes....
Good Luck!
1st: one ore more diodes are defective....
2nd: when ingniton is off, there is voltage on rotor bushes....
Good Luck!
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Originally Posted by 96_4wdr
there are as many as 7 color coded inline fuse links feeding 12v off the main batt. feed on the starter relay post on the driver side fender wall....
remove all 7 and jump from battery to each one in turn until you get same current draw brightness on your light tester then report back color of fuse line, we can tell u which circuit if you cannot locate
Ford Service Cd with wiring diagrams click
use Ford Truck .iso for your year
remove all 7 and jump from battery to each one in turn until you get same current draw brightness on your light tester then report back color of fuse line, we can tell u which circuit if you cannot locate
Ford Service Cd with wiring diagrams click
use Ford Truck .iso for your year
Last edited by Schroder; Aug 19, 2006 at 03:41 PM. Reason: misspelled word
Post Fiend
Joined: Apr 2005
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From: Washington state
my EVTM/s 93>97 do not show any Yellow fusible link so this must be a dealer or owner addon circuit unless it is a special cargo version circuit
the Blue fuse links feed 1. J fuse link > pin 1 on ECU
2. E fuse link feeds the switched 12v circuit of the PCM pwr relay and the Fuel pump relay
Autozone wiring diags.(click) also do not show a Yellow fusible link
try unplugging your ECU main plug and see if batt still drains down....your ECU may have an internal short
the ECU does draw a very small amount of current <100ma and will drain the battery down to no start in a couple months of setting
the Blue fuse links feed 1. J fuse link > pin 1 on ECU
2. E fuse link feeds the switched 12v circuit of the PCM pwr relay and the Fuel pump relay
Autozone wiring diags.(click) also do not show a Yellow fusible link
try unplugging your ECU main plug and see if batt still drains down....your ECU may have an internal short
the ECU does draw a very small amount of current <100ma and will drain the battery down to no start in a couple months of setting
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Originally Posted by 96_4wdr
my EVTM/s 93>97 do not show any Yellow fusible link so this must be a dealer or owner addon circuit unless it is a special cargo version circuit
the Blue fuse links feed 1. J fuse link > pin 1 on ECU
2. E fuse link feeds the switched 12v circuit of the PCM pwr relay and the Fuel pump relay
Autozone wiring diags.(click) also do not show a Yellow fusible link
try unplugging your ECU main plug and see if batt still drains down....your ECU may have an internal short
the ECU does draw a very small amount of current <100ma and will drain the battery down to no start in a couple months of setting
the Blue fuse links feed 1. J fuse link > pin 1 on ECU
2. E fuse link feeds the switched 12v circuit of the PCM pwr relay and the Fuel pump relay
Autozone wiring diags.(click) also do not show a Yellow fusible link
try unplugging your ECU main plug and see if batt still drains down....your ECU may have an internal short
the ECU does draw a very small amount of current <100ma and will drain the battery down to no start in a couple months of setting
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Originally Posted by copper_90680
Hi Shroder:
A belated welcome to our FTE forum.
The ECU or PCM are sometimes used interchangeably. It's just the engine computer.
A belated welcome to our FTE forum.
The ECU or PCM are sometimes used interchangeably. It's just the engine computer.
Thank you
I thought that was the computer but wanted to make sure.
schroder