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Old 02-27-2014, 02:25 PM
smoke=cool=little kid
 

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truck acting up

I was driving home, my instrument cluster stopped working, abs light on, no check engine light, truck still ran... pulled onto my street, turned it off, tried starting but wouldn't start, tried again started but gauges still didn't work, my windows wouldn't roll up or down. But still drive fine. I opened my hood an my fuel pressure was at 43psi, no fuses were blown. So I turned it off. I would turn the let to on position an I would here the injectors buzz an gauges would work for a second then all of the sudden they stopped working after a second an injectors stopped buzzing but fuel pump was still on. So what the hell? I swapped my 305 trailer fuse with my 302 pcm fuse an the gauges worked an everything else went back to normal but my fuel pressure is still at 42psi... and ideas or anyone every experience such a problem. I haven't found another like it.
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Old 02-27-2014, 03:27 PM
smoke=cool=little kid
 

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Also I just swapped the other fuses from 305 to 302 an its fine... a fuel pump failing couldn't cause this could it?
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Old 02-27-2014, 03:39 PM
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Wish I had some input for u, but I have no clue. Sorry
ODAWG714 likes this.
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Old 02-27-2014, 03:45 PM
smoke=cool=little kid
 

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Its intermittent... sometimes the gauge cluster comes on an the truck runs, then I turn the key on again an no gauges, turns over fires off for a second then dies
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Old 02-27-2014, 03:46 PM
smoke=cool=little kid
 

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Its something electrical, I just can't figure out what.
Edit: is there a battery isolator on our trucks or would it be in the alternator? Gona test batteries an alternator

Last edited by SCjake; 02-27-2014 at 04:07 PM.
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Old 02-27-2014, 04:07 PM
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I would start with all the ground points since that is a common point for a lot of connections. Someone else will have to tell you where they all hide.
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Old 02-27-2014, 04:47 PM
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Possibly the gem module or a connection to the gem module, since it's affecting the windows also.
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Old 02-27-2014, 05:11 PM
smoke=cool=little kid
 

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Grounds are good. What's the gem?
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Old 02-27-2014, 05:19 PM
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Quote:
Originally Posted by SCjake View Post
Grounds are good. What's the gem?
......
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Old 02-27-2014, 05:31 PM
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GEMs stopped in o3

Ford GEM Modules Auto Parts Cheaper Blog

Quote:
What does a GEM Do?

A GEM controls all the basic functions of the interior electrical of the truck

Each configuration of a GEM on a vehicle can do many things, the most common things a GEM does is listed below, this is not an all-inclusive list, but includes the, most common options only:

Controls 4X4 on 4 wheel drive modes that have ESOF (knob on dash to control 4 wheel drive).
Supplies power to the radio.
controls power windows and locks
some modules include receivers for key less entry.
Controls Windshield wipers.
Controls Dome Light.

Those are just the basics, they do other things on different vehicles, there are over 180 combinations of options.

Where is it located?

In 1997-2001 Models it is bolted to the back of the interior fuse box. On 2002-2003 models it is on the back of the fuse box or behind the dash on the passenger side.
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