Question about 1998 Dodge Neon

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1998 plymouth neon fan and asd relay circuits

Where are they located?

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  • John Jon May 11, 2010

    is your fans running yet?

  • John Jon May 11, 2010

    are you still looking to locate relays one is very hard to find you have 2 of them!

  • John Jon May 11, 2010

    asd circuits full word description would be great!

  • Anonymous Mar 20, 2014

    wont start when hot



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You will need to locate the fuse panel that is inside the engine compartment. You will find it as a black rectangular box just above the battery. open the cover by squeezing the two clips loated on the right side of the lid (or was thet the left? I forget.) and opening the lid like a book cover. Voila! See those little grey (or black) "cubes"? Look at the inside of the lid cover. The "AUTO SHUT DOWN" and "RAD FAN" relays are posted as they are laid out. (The cover CAN be removed if it helps you)

Posted on Jan 22, 2009


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05 neon, shutdown while driving, has p0522 and p0340. Has no fire. Cam sensor replaced, no obvious signs of damage to any wiring. Help?

Usually dodge--Chrysler--Plymouth, the computer has to see both the cam and crank sensor signals or it won't ground the asd relay. The asd relay supplies voltage to several systems, dark green wire with orange tracer, primary voltage to ignition coil and fuel injectors just to name a couple. There could be other issues, like a problem with wiring circuits, somewhere or voltage.
The p0522 is oil pressure sender, low voltage. The other code does relate to cam sensor. Before I replace a sensor, I try to check wiring circuits.

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Where is the kill switch located at on a 2001 Plymouth Neon?

Doesn't have a kill switch , check ASD relay in the under hood fuse/relay box . Or fuel pump relay . Does your vehicle have spark at spark plugs ? Try spraying some carburetor cleaner into the throttle plate an see if it try's to start. The ASD relay powers the injectors an ignition coils .

Feb 02, 2016 | 2001 Plymouth Neon

1 Answer

How do I shut off the auto shut down on a 1998 Plymouth grand voyager

If the key was off, the relay shouldn't have been doing anything. You have to crank it to get the asd relay to do anything, there needs to be rpm signal.You should have checked voltage and ground circuits for the relay before changing? The computer controls the ground for the control side of relay. Maybe the ground is shorting or something going on with computer?
Any applicable trouble codes?
Check the cam and crank sensor signals. Just my opinion.

Mar 03, 2018 | 1998 Plymouth Grand Voyager

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My 2001 neon wont start and the asd relay in the fuse box is making a clicking noise. i replaced the starter , new battery tested the alternator what could be the problem

have you checked for voltage at the starter for each terminal when there is to be voltage at each terminal.also you could have a bad asd relay that is working only on one half of the circuit but still makes a clicking noise.

Jun 09, 2011 | Plymouth Neon Cars & Trucks

1 Answer

Where is the fan relay switch located in a 1996 plymouth neon highland? the fan won t turn on and causes the engine to overheat.

There is a relay located in the power distribution center. This should be located under the hood, either on the fender wells or near the back of the engine compartment. It will be label power distribution. Open the cover and find the relay label for the fan. It is possible that another relay is mounted under the headlights probably on drivers side. Follow the wires from the fan motor. If you find a relay try replacing that one also. Good luck and be careful the relay may be loose or intermittent and can start the fan at anytime.


Feb 26, 2011 | 1996 Plymouth Neon

1 Answer

Where is the emergency fuel cut off switch located?

The neon don't have one, check the fuse and relay's. The fuel pump is also controlled by the Auto Shut down relay (ASD). The power supplied to the fuel pump. Ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD). The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running  the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module.  This causes the engine to shut down. Good luck and hope this helps. 

Jun 29, 2009 | Plymouth Neon Cars & Trucks

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Have a 1998 plymouth neon, and the heater quit working, the fuse is fine, where is the fan located?

Hello, the blower fan is located under the dash on the passanger side.

Dec 10, 2008 | 1998 Plymouth Neon

2 Answers

Cooling fan relay 1998 neon

on the left(driver's) side of the lower rad support. It's a small flat relay with a plug on the bottom and usually has a blue colored front. held on by two screws. Also, there may be more rad fan relays in the underhood fuse/relay box.
Good luck.

Sep 15, 2008 | 1998 Dodge Neon

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I am having trouble with my speedometer not working occasionally and now my seat belt light is coming on sometimes too. Is this the instrument panel cluster? Or something else? 1998 Dodge Neon. Backstory is as follows: -We take very good care of it and have one dedicated mechanic. -It has only had two owners; my parents and I. -We replaced the battery 2 months ago. -Mechanic checked to make sure the speedometer sensor was working. -We have had issues with the radio for years where it will randomly turn on and off, typically brought on by a stuffed trunk OR wet weather. -The speedometer works until we hit a bump and then the needle flies up and down or sometimes just stops working all together. -Mechanic has made mention of there being some Chrysler specific battery cable that is a smaller side cable and it is not in good condition. -Currently, my problem is that I can't find an old 1998 Dodge Neon in the salvage yard because yards are doing a lot of 2002 and newer vehicles and automatically crushing the others. The meat and potatoes of my question is what direction do I go in? And what of these symptoms ties to each other? And will adding new solder to the points on the panel fix it or is it something else? I'm trying to find least expensive to most expensive options and I'm rather handy but can't drop an engine or transmission or anything so keep this in mind. My handiness ends at resoldering the pins BUT I do have a mechanic I trust, but I fear that maybe I'm not combining symptoms properly. I have the money to repair an item I KNOW is wrong but not to chicken hunt around for problems.

Mar 22, 2017 | 1998 Dodge Neon

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