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Question about Ford E-150

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1994 Ford E-150 Econoline. I have an electrical short in my car when I turn my lights on or I step on my brake.

Okay let me see how I can explain this. I am in desperate need of help with this problem. I am having with my 1994 E-150 van It seem to have a short running through my lights somewhere. It only shorts when I turn on my lights or step on my brakes and my lights seem to be real dim. Sometimes it seems like the car is about to turn off while I'm driving it. It also has my dash gauges jumping around like crazy. Can someone please help me? I've been trying to figure this out for months. The closest I got is that the Number 8 fuse that's underneath the dash which is a 15 amp fuse is running constant power. How I figured that out was getting a circuit tester and unhooking the positive battery post underneath the hood and connecting the circuit tester to the positive connection and pulling the fuses until the light on the circuit tester goes out and sometimes I have to jump my car because it's constantly flattening my battery. Can someone please help me?

Posted by TALAMON'S GRILL on


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Question edited to make it a lot more clear.
Question moved to model category.

Fuse 8 is SUPPOSED to have Constant Power. This is what it covers.

Anti-theft indicator;
Courtesy lamp switch;
Dome/map lamp;
Illuminated entry;
Power mirrors;
Radio memory;
Remote keyless entry module;
Visor lamps

These are all things that are needed before you turn the ignition on. Check you don't have lamps permanently on especially the visor lamps as you see it?

How old is the battery? Is the alternator charging correctly.

There are ways to test for parasitic draw, and your way isn't any of them! Your best bet is a mobile auto electrician with a pro grade scan tool computer.

Testing parasitic draw.

Testing alternator

Testing the battery condition takes 2 minutes at any Interstate Battery Shop.


Posted on Nov 24, 2022


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