Question about 2005 Dodge Neon

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2005 neon electric fans not working. 30 amp fuse looks good. it has 2 relays. i switched them but nothing happened.

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Sounds like the coolant temperature sensor if it is bad it will not tell the fan to come on. that also provided the fans themselves arent bad, which can be tested by connecting a hot power source to one of the fan terminals and grounding the opposite

Posted on Aug 06, 2010


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F150 wont start don't even get lights or anything battery good but nothing else works

What year F-150 ? Do you know how to test automotive electrical circuits ? Find a electrical distribution diagram at Enter vehicle info. year , make , model and engine size . Under system click electrical distribution , then under subsystem click power distribution . Click the search button ,then the blue links one at a time . Start at the battery , with a volt meter ,what's the voltage . Then check main power feeds to power distribution (fuse /relay) boxes . Under the hood , inside the vehicle etc... The first diagram shows two main 30 amp fuse in the ( BJB ) one supply's B+ to the starter relay an if you look down about 5 or 6 diagrams you will A goes to the ignition switch. The other 30 amp fuse powers the PCM power relay . Both of those if open could cause your problem . If these are ok keep looking at main power feeds etc....

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Car will not start, its not battery, I was told its a fuse, need diagram of fuses to which one affects starting car

Car will not start how ? A crank- no - start or a no crank - no - start < meaning when you turn the key to the start position does anything happen ? Starter engages an spins the engine an doesn't start an run ! Or when you turn the key to start the position nothing happens ? Who told you it was a fuse ? Are there any light's lit on the instrument cluster , SECURITY ? If Nothing happens Find the starter relay an jump pin's 30 & 87 , if nothing is wrong with starter , battery , battery cables it should spin the engine . Is your vehicle automatic transmission or stick ? Automatic has a neutral safety switch , won't let vehicle engine spin unless in park or neutral . Manual has clutch switch , won't let starter engage unless the clutch pedal is pressed . Both of these switches can go bad . There are videos on youtube on basic electrical trouble shooting . Also on testing starter circuit . How to voltage drop test starter motor circuit

Nov 13, 2016 | 1996 Dodge Neon

1 Answer


you changed the thermo switch and relays and it didnt fix it
did you test the fan motor itself

the fuse box cover should have a fuse layout diagram
engine cooling fan

look for a 30 amp fuse

they usually near the fan relays

is the air con cooling fan working with air con on
and engine running


Jul 15, 2016 | Toyota Cars & Trucks

1 Answer

Where is the Power Windows Fuse in a 2005 Ford Taurus?

It is located in the SJB smart junction box , it's a fuse / relay center / microprocessor ! Fuse # F2.10 30 amp . location -behind left side dash panel . Also check the accessory relay . Top relay left side , same location SJB .
Visual Inspection Chart Mechanical Electrical
  • Door window regulator and motor
  • Door glass top run
  • Door window glass
  • Loose, corroded connectors
  • Circuitry
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  • Smart junction box (SJB) fuse(s):
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  • SJB circuit breaker 10 (30A)
  • SJB rear window defrost relay 1
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Sep 23, 2015 | 2005 Ford Taurus

1 Answer

My 1993 caroiia dx is overheatting and i notes the fan is not turning on so i drectly put it to battery and it goes on.

You must have a problem in the fan circuit, either the fuse, the relay, power to the relay, or the sensor. Easiest place to start is the sensor, on Toyotas of his vintage the sensor is wired so that if it is unplugged the fans will turn on (providing the ignition is switched on) Look to the bottom of the radiator, there will be a sensor with 2 wires. Unplug the sensor and turn the ignition to ON. If the fans go, the sensor is faulty, and is he cause of you fans not turning on when the engine heats up. If the fans remain off, the next thing to check is the fuse. In the fuse box under the bonnet you should find a fuse or fuses labeled fan No. 1 and fan No. 2 (if air conditioning is equipped) NOTE these are sometimes labeled RDS and CDS The labels are on the underside of the fuse box cover. Check the fuse/s by either looking through the top if they are the square type, or pulling them out and looking through the side if they are the blade type. If none of these fuses are blown there is an electrical fault that requires some electrical knowhow to diagnose. The problem could be a blown AM1 or AM2 fuse, which you could also check, these are the battery feeds from the ignition switch to the rest of the car. Usually a blown AM fuse will mean other electrics will not be working either. Another possibilty is a stuck relay, though highly unlikely, as they usually fail to work, meaning the fans will be constantly on. They're named fan No.1 and Fan No. 2 usually You really need to understand how a relay works to check if there is a problem, for instance you can check if the relay coil is being energised by using a test light across the pins in the socket when the relay is removed. You can also check that ignition voltage is being supplied to the contacts of the relay while it is removed. Toyota relays have numbers 1 2 3 4 & 5 for the pins on them. There is usually a small diagram on the relay to tell you which pin is which number, and possibly which pins are the winding and which are the switchable contacts aswell. In general, pins 1 & 2 are the winding, or activator in easier terms, and pins 3,4 & 5 are the switched contacts. Pins 3 &4 are usually common and are disconnected & joined with pin 5 when the relay is energised. NOTE some relays exclude pin 4, and some replace pin 5 with pin 4, leaving only 4 pins in total.
To check the fan circuit with the relays removed, bridge across the sockets where pins 3 & 5, or if it only has 4 pins, pins 3 & 4 and the fan should turn on with the ignition switched on. If not, there is a problem with the ignition circuit.

Mar 16, 2011 | 1993 Toyota Corolla

1 Answer

2005 freestar fans not cutting on causing engine to run hot, what could be the cause. Once I get moving on the interstate it cools off, but in town I am constantly looking at the temperture needle. Thanks


May 24, 2010 | 2005 Ford Freestar

1 Answer

Car is overheating when stopped or idling

It sounds like your electric fan is not working, check the fuse to the radiator fan and that should be located in the fuse box in the engine compartment close to the battery. Look to make sure the fuse and relays are good and then work your way to the fan to make sure the wire harness is good and not damaged due to corrosion. Good luck and please be safe when working around the electric fans. 

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1 Answer

2002 Saturn SL2 A/C Not working.

I would test the A/C compressor clutch coil first , easiest to do . If the electromagnet clutch coil is bad ,the compressor won't engage . Pull the A/C compressor clutch relay an jump pin's 30 & 87 , where the relay plug's into the fuse box . If pin 30 has B+ voltage ,pin 87 sends that B+ voltage to energize the clutch coil . These clutch coil's can go bad . You could also check the cooling fan this way , pull the cooling fan relay an take a piece of wire an jump pin's 30 & 87 .If fan is good it will run . Do you know how relay's work ?
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The PCM controls both relay's by supplying a ground to energize the relay .
Is the check engine light on ?
Do you know what a wiring diagram is ? How to use one along with a DVOM - digital volt ohm meter to test automotive electrical circuits ? Not guessing ? This is how an automotive technician would solve this problem , hooking up a scan tool an checking for code's ,using bi-direction control of scan tool to manually try to turn on coolant fan ,A/C compressor .....
Free wiring diagrams here
Enter vehicle info. year , make , model an engine size. Under system click on engine ,then under subsystem click on cooling fans ,check the electrical circuit's .

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3 Answers

Dodge Neon 2005) Car will not start.

I was having the same exact problem with my 2005 neon as well. The guy at Discount auto suggested the starter itself was the problem(cost approx $200). The car isn't old enough to be having a starter issue so I figured it was something more simplilar. My dad took a look and founf out it was the starter relay. It is located in the black fuse/relay box on the driver's side right next to the battery. I had to get a new relay at the dealership(cost $20) and my car starts perfectly. Hope this helps

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