The regulator at the engine case. show location

There is no fusible link. Locate "Fuse B" 120 AMP located in the battery junction box located at front left corner of engine compartment. With engine off, key off, both sides of the fuse should measure +Battery Voltage. Reference negative post for testing.

right hand side of the engine looking at vehicle from Hood has a little tiny vacuum line coming from plenum to fuel pressure regulator regulator has hard steel lines connected to it leading to firewall if this doesn't help Google year make model and regulator

ok, in what country?????????? be the first ever to say, we are a USA forum so if not in the USA all answers can be wrong, see?

as you may not know, this is regulated by, (drum roll) country SOLD.(to)
they have laws for this, not only that jeeps are made in Europe too. (all this is encoded in the VIN number on dash)

some dont even require it and the makers skip this, (saves $$$)
all steps making a car cost $$$
and the book that always shows this is what, the FSM
all uSA FSM books show all engine, and the serial location of each.
we dont need it here, or registrations don;t list engine numbers.

Patriot. (ours is called the MK jeep) 2007 plus.
ill try to guess your engine.

• 2.0 L World I4 (gasoline)
• 2.0 L VW I4 (t/c diesel)
• 2.2 L OM651 I4 (t/c diesel)
• 2.4 L World I4 (gasoline)

there i guessed (no that is what is sold)
4 different engines.

if not in the USA
the operators guide in the glove box might have this,
did you look there first. its a first first thing, on all cars made.
look first.

if you go to your jeep dealer, id bet they can answer this in a jiffy.
the be 2nd.
if that fails, they you need to learn what you are driving
what engine, and decode the VIN.
the VIN in most cases shows ENGINE code.
by telling others this code we can ID the engine and read books on your engine.

Depending on the year and engine size, the regulator is usually in the fuel rail near the injectors.

All Fuel Pressure Regulators are usually attached to the Fuel Rail. In any case, they have a return line to the fuel tank. On your engine you may have to remove the pretty "Plastic Cover" that covers the top of the engine to see the fuel rail and the pressure regulator. Look for a "tube" that has fuel injectors going from the bottom of it and into the top of the intake manifold. The fuel pressure regulator is a round looking device attached to the end of the fuel rail with a small fuel line coming out the bottom and a vacuum line attached to the top of it. At least in most cases this is what it will look like. Especially if it an OEM set-up. Aftermarket set-ups will differ. I hope this helps.

I'm assuming you mean the charging voltage indicator. This is an indication of an incorrect charging voltage (too high, should be from 12.5 to 14 volts). This problem is most likely caused by a bad charging voltage regulator. There are two variations of the location of the regulator: 1) regulator is outside of the alternator and located on right side of the engine compartment on the wheel-well, below the starter relay or 2) The regulator is inside the alternator (in which case you'd have to replace the alternator).

The engine computer is also the voltage regulator.

I copied the following from another site. It might be something you should look at.

"The voltage regulator is built-in to the ECM...about a $275 part! However, before you jump to conclusions about the voltage regulator being defective, I'd highly recommend that you go visit the autozone website and follow the "Check charging system" word for word. I discovered that the alternator in my 1990 Dodge van wasn't grounding? How could that be? It's bolted to a metal bracket, right? Could be corrosion, could be rust? I even installed a second ground strap from engine to body. Nothing worked until I ran a ground wire from the battery to the alternator case. Charged just great then! Of course I discovered this after first replacing the alternator and the ECM! Don't you make the same (expensive) mistake."


Read more: http://wiki.answers.com/Q/Where_is_the_voltage_regulator_in_a_1990_Dodge_Ram_250#ixzz1HABX5yJ7

You have an open fusible resistor on the regulator section.
If this is the case then check volt regulator IC for short.
This is not DIY if you haven't an experience so advice you to look for a technician to locate the faulty parts on the volt regulator section.

Thanks for using fixya.

Pls rate my help.

Locate the Fuel Filter and Fuel Pump

Raise the Neon's rear end on jack stands. Remove the panel inside the trunk covering the fuel pump assembly. The fuel filter should be on top of this. On most Dodge Neons the filter is usually directly attached to the fuel pump. In that case, those two parts should not be separated and should be replaced together.Its a silver dome about 2.5 inchs round with a single plastic hose coming off it.

REMOVAL :-------
WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE, EVEN WITH ENGINE OFF. BEFORE SERVICING THE FUEL FILTER/FUEL PRESSURE REGULATOR, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

1. Refer to Fuel System Pressure Release in the Fuel Delivery System section of this group. The fuel filter/fuel pressure regulator is located on the top of fuel pump module. Fuel pump module removal is not necessary.
2. Raise vehicle on hoist.
3. Disconnect fuel supply line at the Filter/Regulator nipple.
4. Depress locking spring tab on side of Fuel/Regulator and rotate 90 ° counter-clockwise and pull out. NOTE:Make sure that the upper and lower O-rings are on the Filter/Regulator assembly.

INSTALLATION
Lightly lubricate the O-rings with engine oil.

1. Insert Filter/Regulator into the opening in the fuel pump module, align the two hold down tabs with the flange.
2. 1. While applying downward pressure, rotate the Filter/Regulator clockwise until the the spring tab engages the locating slot.
   2. Connect the fuel line to the Filter/Regulator.
   3. Lower vehicle from hoist.----------------

   Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
   

Yes it sounds like the voltage regulator is shorted.The 30 ac volts is correct for the alternator output.The yellow leads on the regulator shouldn't read ohms between each other or to the aluminum case.The red lead shouldn't read ohms to the aluminum case.If you do a diode test between either of the yellow wires to the red wire it should read one way only. If it reads both ways in a diode test it is bad.Voltage regulators are cheap on ebay