My 1996 Ford Ranger 4x4 (TRS-2) Re-Build


Uncle Gump

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Plano IL
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2006
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Ford
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4.0L
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Lead, Follow or get out of my way
You can use a test light... or an ammeter in series between the negative battery cable and the negative battery terminal.
 


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bobbywalter

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Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
is that minder critter thing for oil change and hours still part of the system?....

there were a few things there that the standard fuse pull methods may not find....

i think some sort of alarm was in there....you have tons of wiring for the lights ect...

the obd port may be active....seen that before. gem module pulling current too...
 

Jim Oaks

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Location
Roanoke, Texas
Vehicle Year
1996 / 2019
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
6-inches
Tire Size
33x12.50x15
I finally decided to look for the parasitic draw on my Rangers battery. This has actually been a problem for a very long time, but ignored it because I usually disconnect the battery when it sits for a while.

Well, no more!!

ford_ranger_parasitic_draw-1.JPG

Take a screwdriver and push your door latched closed so you can leave it open. Otherwise, the dome light will be on. You may want to do it on both doors so you can get in both sides without interfering with the test.

This looks like a mess, but I disconnected the (-) cable and used some jumpers with alligator clips to connect my multimeter between the (-) cable and the (-) terminal on the battery.

ford_ranger_parasitic_draw-0.JPG

With the dome light off and nothing on meter showed that the battery had a 0.28 amp draw.

ford_ranger_parasitic_draw-3.JPG

You cannot start the test here. Some people will start pulling fuses looking for the reading to drop, and blame it on the fuse for the instrument cluster. You have to wait a good 45-minutes for the battery saver mode to kick in.

After waiting and checking back, the amps had dropped to 0.12 amps.

ford_ranger_parasitic_draw-4.JPG

I believe the normal acceptable range is 0.01 - 0.07. This is where people will start pulling fuses and relays trying to find the faulty circuit.

For me, I got lucky. I decided to start with the accessories that I had added to the truck. There are a couple of relays that operate my off-road lights. Upon pulling the fuse to the second relay, my amp draw dropped to 0.01.

ford_ranger_parasitic_draw-5.JPG

Stupid relay. :cautious:

ford_ranger_parasitic_draw-6.JPG
 

ericbphoto

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Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
Nice job. I need to do this job. I’ve been leaving a charger on it when parked long term.
 


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