Electrical/fuse box

Tiny
FREDDY EISELE
  • MEMBER
  • 2002 FORD WINDSTAR
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 84,000 MILES
The fuse box in the van under the dash there are fuses that are working and have power, and then there fuses that aren't working but aren't blown. Just not working, which I have no power, no accessories, no crank, no start. No dash lights no nothing. My battery has 12 volts, new starter, new alternator, but when I turn the key nothing.I do have power for the radio, windows, and head and interior lights but nothing else. The accessories do not work in that setting either. I checked all relays and there all working. What is wrong?
Thursday, August 8th, 2019 AT 6:42 PM

9 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

In the diagrams down below I have included the Power Distribution Wiring Diagrams for your vehicle. You can follow the flow of electricity from the battery of your vehicle to the Central Junction Box, which is under the dash, and is the fuse panel you are having problems with. Check the sources that feed the fuses that are dead for opens. I have also included in the diagrams down below a guide for how to check for an open in an automotive electrical circuit, as well. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Friday, August 9th, 2019 AT 1:35 AM
Tiny
FREDDY EISELE
  • MEMBER
  • 6 POSTS
What do you mean by sw1, sw2 and so on?
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Friday, August 9th, 2019 AT 5:38 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

If you look at the diagram SW1 and SW2 are switch1 and switch2 in the diagram. DMM stands for Digital MultiMeter and then there are 3 breaks in the circuit Open A, B, and C, also a relay, and the figures that is 3 bars configured like an upside down pyramid are grounds.

Thanks,
Alex
2CarPros
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Friday, August 9th, 2019 AT 10:54 PM
Tiny
FREDDY EISELE
  • MEMBER
  • 6 POSTS
I'm sorry I still don't understand what your trying to tell me to do, the fuse block or do you mean the fuse box. Plus the digital multi-meter needs to connect to the fuse or is it a wire going to the fuse box.
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Saturday, August 10th, 2019 AT 7:06 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Okay, the wiring diagrams are the Power Distribution Wiring Diagrams for your vehicle. They will show you how the electricity is routed in your vehicle. Follow the path from the battery and you can see the path it takes to make it to the fuse box you are having issues with. You can also trace the path the electricity takes in the fuse box (Ford calls the one you are having problems with the Junction Box). It goes across a BUS bar and the fuses plug into that. The fuses that are dead, obviously have an open in the circuit somewhere in between the dead fuse and the battery, so now you know the electrical path, you can find the open. The other guide is a description of how you find the opens in an electrical circuit, which is what you are going to be doing.

Thanks,
Alex
2CarPros
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Saturday, August 10th, 2019 AT 5:33 PM
Tiny
FREDDY EISELE
  • MEMBER
  • 6 POSTS
Okay, but is it possible that it could be something else cause it's not just one fuse that is out it is multiple fuses. Fuse number 8, 9, 10, 14, 18, 19, 22, 25, 26, and 28. Also where or what are these sw1, and sw2 located. Is it just a point in the wire that your calling sw1 and sw2. Or something else. Sorry about all the questions but I need to know cause I can't afford to take it to anyone as I don't have the money. I thank you for all your help.
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Sunday, August 11th, 2019 AT 8:58 AM
Tiny
FREDDY EISELE
  • MEMBER
  • 6 POSTS
Not number 8. Fuse but 18.
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Sunday, August 11th, 2019 AT 9:00 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

The SW1 and SW2 are switches, and the diagram is just a hypothetical circuit used as an example to describe how to find an open in an electrical circuit. I'm sorry that I can't do much more than tell you how to find the problem, the vehicle isn't in front of me. If you have multiple fuses that are out there HAS to be an open in the circuit between the vehicle's battery and these fuses. There is no other way for this to occur. Start with the battery and follow the electrical flow. My advise is pay attention to the details on the wiring diagrams and have a piece of paper to write the pathway down as you are following it. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, August 11th, 2019 AT 2:35 PM

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