Asd fuse

Tiny
POWERS0708
  • MEMBER
  • 2001 DODGE CARAVAN
  • 3.3L
  • AUTOMATIC
  • 170,000 MILES
My van died on me at light the other day got it home turned key on fuel pump kicks on tested all fuel rails got gas but the motor just cranks and cranks will not start I replaced crank sensor and the coil pack plugs and wires car still won't start every time I turn key on wont crank the asd fuse will blow and it's the only one and I think it's the reason car won't start? What to do it's my only driver and I have kids and one on way got to get it fixed
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Sunday, February 2nd, 2014 AT 3:34 PM

7 Replies

Tiny
MLDANIELS2000
  • EXPERT
Try swapping the ASD relay with another one. ASD stands for Auto Shut Down. Part of anti theft system.
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Sunday, February 2nd, 2014 AT 3:45 PM
Tiny
POWERS0708
  • MEMBER
Ok and the asd fuse is 25 amps I have put new in turn engine over and it blows right away and where is the o2 sensor located and is that the common spot for that to cause the fuse to blow I know a lot about cars but when it Gets into still like this idk too much but I have to fix it can't afford to pay someone
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Sunday, February 2nd, 2014 AT 3:57 PM
Tiny
CARADIODOC
  • EXPERT
What's "idk"? There's four oxygen sensors. Two are just ahead of the catalytic converters and two are right behind them.

A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.

A shorted ignition coil would be a good suspect but you replaced that already. The alternator field also comes off that circuit. An internal short is not very likely to occur. More commonly a wire going to one of those items is grounded.
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Sunday, February 2nd, 2014 AT 4:33 PM
Tiny
POWERS0708
  • MEMBER
Ok well I hope I can find it I have not done slit of electrical work tho is it's very frustrating to me
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Sunday, February 2nd, 2014 AT 4:38 PM
Tiny
CARADIODOC
  • EXPERT
How are you coming on this problem? Has it been diagnosed?
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Saturday, February 22nd, 2014 AT 6:55 PM
Tiny
DAVEDRA23
  • MEMBER
Hello! I have a very similar problem with my van. Although, the way my vehicle broke down was different.

I turned on the van and heard a strange noise before I began to drive. It scared me, so I turned it off and turned it back on. No strange noise, but the engine did sound different. I proceeded to leave and drove to my destination, all the way with the van running different than usual. When I arrived, I opened the hood and heard a strange noise coming from the side with the alternator, I assumed it had something to do with the alternator, but did not know what. I turned off the van and used a screw driver to make sure the belt still had tension, it did. When I left, the van was still running strange and the battery light had turned on, I knew it was due to the alternator. Began driving to my next destination. While driving down the freeway, I lost all power. Of course, the van made strange unusual noises, that I cannot remember. I had no lights, and the van was still on. I drove about 10 minutes with no power, just off the battery and when I finally stopped, the van was hot and steam and coolant began spewing from the van.

After all that, I found that the alternator pulley was very loose. Which caused my belt to tear off, affecting everything on that belts path. I put in a new alternator, new belt, new battery and a new radiator. The old one developed a crack, I believe from over heating. I went to start the van and it would crank, but never turned over. I tried the starter fluid in the engine trick and still wouldn't start, so I ruled out a fuel problem, I can also hear the fuel pump turning when I turn the key. I replaced the coil pack just in case, so I ruled that out as well. The spark plugs and wires are all only about a year old, but there seems to be no spark going to them or the coil pack.

So, I now know I have a short somewhere and I saw what you said about the light trick, but I have no idea where to even start with that. I am completely ignorant of how the electrical system works, so everything is new to me. This is my first vehicle, so everything I fix, I am learning for the first time.

I had a friend come look at it, and he noticed a burnt out asd fuse. He switched it with the abs fuse and the van turned on for a bit and turned off. The fuse then burnt out, as well. Do you have any suggestions or advice? I really do not want to go to a shop, but if I need to, I am willing. I would just try to fix it myself before paying for a ton of labor. Is this something I can even fix on my own? Thank you.
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Thursday, January 29th, 2015 AT 9:50 AM
Tiny
CARADIODOC
  • EXPERT
You should start a new question. When you piggyback on a previous post, that person and I are the only two who will see it and have a chance to respond.

First of all, what is the year, model, and engine size?

You have to be more specific when you say "lights turned on" or "lost all power". Lost all power can mean the engine died, the electrical system with the dash lights and gauges went dead, etc.

You said, "I went to start the van and it would crank, but never turned over". "Crank" and "turn over" are the same thing, so did it or didn't it?

When the ASD fuse blows, you won't have spark or fuel. That fuse feeds the ignition coil, fuel pump or pump relay, injectors, oxygen sensor heater(s), and alternator field. All of those systems will be dead. The ASD relay turns on for one second when you turn on the ignition switch, then again during engine rotation, (cranking or running). It sounds like you don't have a dead short if you can hear the fuel pump run for that one second, and the engine ran for a few seconds. Whatever is shorted is likely occurring from the normal rocking of the engine when it starts, or a wire has rubbed through and is making intermittent contact.

My light bulb trick will work but you'll have to bypass the ASD relay. That's pretty easy to do with a paper clip. I'll find a drawing when we get to that point.
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Thursday, January 29th, 2015 AT 10:42 AM

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