It is drawing down batt. when it is in
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.
If you do not have an Owner's Manual, you can get a PDF version HERE (direct link)
Sorry, just tried the link to the Owner's Manual...I guess they will not allow a DIRECT link. Use this link:
https://owner.ford.com/servlet/ContentSe...
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SOURCE: I have a 2005 Ford
Its possible that you have some problem with the blower motor, any short or blower motor go to bad. I suggest check it and send us details.
SOURCE: our ford expedition batt keeps
pull your radio fuse and make sure your glove box is shut tight
SOURCE: My 2006 Honda civic has a underhood fuse box
The mechanic is right. The relay is needed to prevent voltage problems, but remind him that you want a fuse inline since one way or another, the original was fused.
Also ask him about what happens with the antitheft alarm. It is suppose to blow the horn with lights flashing. You probably will lose the horn for that task.
Since this is a Hybrid, it will be very difficult to obtain a used or Salvaged fusebox for your car from a Salvage yard. Otherwise using a used part would save you alot if you want the fusebox replaced.
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1996 ford ranger underhood fusebox diagram
50 amp fuse #13 draws down batt.
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