Trying to trace a parasitic drain on this truck I can't seem to find the correct fuse wiring. I got an e-copy of 2001 ranger and it also contains an electric vehicle lay out. The fuses in this diagram are not as mine. Fuse 19 in my vehicle is 25 amp and serves PCM diode, Pats and ignition. In the E diagram it's 15 amp and serves power steering ETC. Fuse 26 in my vehicle is 10 amp and serves BSR, RCM, and Gem. The E- diagram is 15 amp and serves Sensors and back up lights ETC. All I have been able to find include the electric vehicle and don't match mine. Any Idea where I can get a copy to match my ranger?

 

Welcome to the forum

Here are the 2001 diagrams I have

Heads up on drains
1995 to 2003 Rangers use a GEM module to control cab electrics
GEM has a timer that stays active for 20-40minutes after key off and all doors closed, doesn't need to be locked just closed doors
GEM will then "go to sleep" and power draw will go down

Expected power draw after GEM is "asleep" , is .04amp to .07amp, .07amp would be if you have keyless entry, it needs to "stay awake" full time
.04/.05amp would be just for Radio clock/presets and computer memory

If you pull fuse 26 in the cab fuse box that will put GEM "to sleep" manually

If battery is going dead over night then FIRST check the battery, unhook either battery cable, and test battery voltage, says it's 12.3volt
Let it sit for an hour or two, longer is better, then retest, if its lower then battery is SELF DRAINING, has a shorted cell inside

If battery voltage is 12.2volt or lower to start with its a bad battery, end of life
New battery is 12.8volt
5/6 year old battery is 12.3volt
12.2v or less is a done battery

 

Thanks Ron, for the quick response That is just what I'm looking for. Also the expected amperage draw is also very handy. I'll post what I find. Love this forum. My battery has been draining and won't start, It's after 3 or 4 days, as I don't use it much any more. I thought battery (Walmart). but had it checked twice and it checks good. Only 2 years old and takes a charge well. Thanks again. Car Mike.

 

Sounds good

There is no way to test self draining with a tester in 5min or 30minutes, so battery can test OK and still be self draining, so grain of salt on battery testing
If you can unhook the battery, test voltage, write it down and then come back when you need to use the truck again and retest voltage before hooking it back up that will take self draining off the table

If your battery has a CCA(cold cranking amps) of 500 then multiply that by .7 = 350 amp/hours, so battery would go dead with a 1amp draw after 350 hours, about 14 days
5 amp draw 70 hours, 3 days

.07amp draw 208 days

 

Ron, this is my results after doing a current drain test on my battery. Turned everything off in my ranger, activated the door switch so it would always show closed (not reset timing switch when I opened the door) , opened the hood. disconnected the Neg battery lead, connected the Volt meter in series with the Neg lead to ground. I read 249 mils. 45 minutes later it dropped to .079 mils. It took that long for the GEM and Battery saver relay to activate. I checked fuses to find the source for the remaining .079 mil draw and found it was through fuse # 17, a 20 amp fuse. That fuse feeds the cigar lighter and the Data link connector (DLC). When I saw that, I realized I have a FIXD vehicle analyzer plugged into that port. I've had it there for about two years and only use when I get a check engine light. FIXD works great. Anyway I unplugged the FIXD unit and my battery drain dropped to .024, so that FIXD device was pulling around .050 mils. I connected everything back normal. Checked current drain in Neg lead, it was .202 mils. 45 minutes later it dropped to .022. So that is a constant draw with all shut off. That would not drain a battery in 4 or 5 days. Next, I will do as you suggested, and unhook my battery lead and watch to see how much the battery drops just sitting. I'll make sure it's fully charged and watch it. Thanks for your help. I love my 2001 ranger. Bought it new and put 217000+ miles on it. Was having the timing chains cossets making noise (too much slack) and since I had to pull motor to replace the right rear one, I just replaced the motor with a ford remanufactured one.. That was in Jan of 2017 and I have only put 5 k on the new motor. I'm 82 so I don't run it to much anymore, but want to keep it up. Thanks again.

 

Good testing

Thanks for the update

Yes the power points on the Rangers have full time 12volts, you can add a Key On relay to cut power but easier to just unplug whatever is plugged in to it when it will be sitting for longer periods