Question about 2000 Ford Excursion

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2000 ford excursion battery draw

I have a battery draw that seems to becoming from blower circuit. The 50 amp fuse in the underhood box stops the draw. The fuse is 103 the battery distribution box. I have found that the fan circiut will work without the key and sometimes want turn off even when in the off position. I have to turn the key on and then off again for the fan to die. The relay under the hood has roughly 6.8 volts on terminal 85. So I guess my guestion is where does that terminal get its power? From a bcm? Need a diagram?

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  • Anonymous Mar 30, 2014

    Found it in the circuit for #33 fuse in the smart junction box. could you tell me where the problem could be?

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I hop this will help

Posted on Nov 11, 2009

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On the 2000 Jeep Grand Cherokee the # 15 fuse is the IOD circuit. (Ignition Off Drain) The # 12 fuse is the power windows. Both fuses are 50 amp.

This IOD fuse #15 powers the distribution box that contains the 50 amp fuse. Pull each fuse in the under hood.

Pull each fuse in the under dash. Check for on the passenger side floor is an additional fuse panel.

Before going to far suggest at night checking for any lights lit. The draw is about right for a small light bulb.

Typical draw for parked car is around 100 milliamps

Suggest that you disconnect power to the car for several minutes. Reconnect the battery. The object is to reset the body electronics module.

If the computers in the modules get a glitch they can cause a drain. By cycling the power, disconnecting battery, they will reset to factory settings. Reported it can take up to 20 minutes for the circuits to drain before you can reset!.


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Jeep Grand Cherokee WJ Electronic Control Modules

the following web site does a great job of explaining all that is going on. What appears to be simple to troubleshoot is not so easy. He comments about delay before sleep are important. Testing after overnight may result in a different drain rate. Make sure that your battery meets specifications. In 2000 the drain rate may be relatively high and the reserve capacity of your battery low.
http://www.tomorrowstechnician.com/parasitic-drain-ii-jeep-grand-cherokee
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Underhood fusebox fuse #13 50 amp what is it for


The large MAXI fuses in the engine compartment fuse block are the MAIN fuses. They supply voltage to several other fuses or circuits.

MAXI Fuse #13 in your 1996 Ford Ranger is supposed to be a 30 Amp fuse (not a 50 Amp) according to the power distribution diagrams as well as the fuse block detail diagram. This fuse supplies voltage to the Powertrain Control Module (PCM) power relay and to the oxygen sensor heater circuits.

Please note that it is NORMAL for this fuse to cause a draw on the battery during vehicle operation and also after engine shut down. The OBD-2 oxygen sensor heater circuit monitors run after engine shut down and key off. This can take up to 45 minutes to complete. After the O2 heater monitor has run, the PCM will go into sleep mode.

When the PCM goes into sleep mode, the battery draw from this fuse will be reduced greatly. If you are performing "ignition-off-draw" tests trying to figure out why the battery keeps going dead, it is best to use an ammeter that has a 1 or 2 amp scale. You should set-up for the test using a shunt bar. Wait for 45 minutes to an hour for all of the computer systems in the vehicle to go into sleep mode, then open the shunt. Your computer memory, radio pre-sets, clock, etc. will continue to draw without ever shutting completely off. Any draw under 300 Milliamps is considered "acceptable". It is my experience that most vehicles have an ignition-off-draw of somewhere near 150 Milliamps.

The underhood fuse box diagram can be found on page 314 in the 1996 Ford Ranger Owner's Manual.
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To further narrow down the source of your draw, pull each of these fuses one at a time.
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My 2000 chevy blazer is having battery issues.i have had the battery a year and replaced the altinator a year ago,and something keeps draining the battery.I can't seem to figure this one out


if you have an volt meter capable of reading amperage you can check for a draw fairly easily.

Turn off the vehicle, remove the key, unplug any accessories from the 12 volt (cigarette) outlets, and disable the under hood light if equipped.

Disconnect the negative battery cable from the battery. Install your amp meter in series, one lead on the negative terminal of the battery and one lead on the negative terminal of the battery cable. You should see less than .050 amps. It may take up to 20 minutes for everything to power down so don't worry if you see more right away.

If after 20 minutes it does not drop lower than .050 amps you have a draw. You can start removing fuses from the underhood fuse block one at a time. If the draw goes away than you have just narrowed down the possibilities to that circuit. Post what fuse you pulled and I can help you further.

If none of those fuses cancel the draw remove one of the test leads. Open the drivers front door and remove the courtesy lamp fuse from the instrument panel fuse block located behind the access panel on the end of the left side of the dash. Reinstall test leads and then start removing those fuses one at a time.

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I had to remove a fuse in my 1998 ford escort, stop battery drain


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