Who can solve this???

[enook]

OK so hello everyone, my first post. After a TON of research and talking to tons of people about my issue, no one can tell me exactly what is going on.

I have a 2000 GMC Jimmy. I live in a place called Chesterfield Inlet, Nunavut and there are no dealers or mechanics in town. I had to ship this truck up on a barge becuase there are no roads coming in or out of town. To Make matters worse, I got this truck for my girlfriends mother who is 70 and she cant even use it. We put only 120 KM on the thing before it went like this.

My situation:

One day I went to start my truck and it wouldn't crank. All lights come on the dash fine it just wouldnt crank. The next day I try and it is perfect. A few hours later I wanna go to the store and once again, it won't crank.

It is to the point now where it has not cranked in 3 weeks.

I replaced the starter but that didn't do anything. When I do the screwdriver trick on the starter, the truck turns over but won't even fire now. AT least before when I managed to get the truck to crank, it would fire up and run perfectly.

I replaced the neutral switch but this was not the problem either.

I tried turning the key to the on position for 30 minutes to reset the chip or whatever but this didn't work either.

I was told that if it was a passlock II issue the truck would crank it just wouldn't start...is this true?

If someone can help me solve my problem I would be forever grateful and would gladly make a donation to this site.

PLEASE HELP!

[brcidd]

Any aftermarket alarms or keyless entry? You could have a bum starter interrupt from a bad installation job if so..

Other than that, it could be ignition switch- I always test this by putting 12v to yellow wire in steering column- afte I confirm it is dead when ignition is turned to "start." When starter cranks- then, the ignition switch is bad.

With PasslockII it has been my experience that truck will crank start, then stall within 2 seconds, and the security light will flash. Is your security light flashing?

[enook]

Originally Posted by brcidd

Any aftermarket alarms or keyless entry? You could have a bum starter interrupt from a bad installation job if so..

Other than that, it could be ignition switch- I always test this by putting 12v to yellow wire in steering column- afte I confirm it is dead when ignition is turned to "start." When starter cranks- then, the ignition switch is bad.

With PasslockII it has been my experience that truck will crank start, then stall within 2 seconds, and the security light will flash. Is your security light flashing?

No aftermarket alarms but it does have keyless entry.

When I use a screwdriver to bypass, the engine will turn over but it won't start. Before when turning the key, the engine would always start and fire right up, running perfectly.

How do I test the ignition switch exactly? DO I cut a wire? WHat shoudl I be looking for here exactly?

Any other ideas guys?

[enook]

ttt

[tech4diesel]

jumping the starter will not start truck if ignition has no signal from switch. check grounds and load test battery. try to start in park and neutral. contacts may be warn out in key switch. I don't have my manual here but the wires should be pink power feed yellow is igntion feed and there should be ground and accesseryand starter exciter . get to wires turn key on check 12v pink &12v yelloww/key on. if no ar low at pink check relays and fuse. if 12v red no or low v at yellow jump power from pink to yellow then jump starter with screw driver. my money is on bad ground at battery or alternator. or bad switch contacts chavy ignition switches suck.

[enook]

OK so if I do have a bad ground what should I look for? Am I looking for a wire that is touching another wire?

[tech4diesel]

Originally Posted by enook

OK so if I do have a bad ground what should I look for? Am I looking for a wire that is touching another wire?

u should use an ohm meter to check continuity. if not that advanced sometimes just loosening ground connections and scrapeing off mating surfaces. Rust builds between mateing surfaces increaseing resistance, lowering voltage to power wires.

[gatoratoy227]

before any thing disconnect the positave terminal on the bettery for 5-10 minutes after you reconnect it if it starts the anti-theft module is bad nothing that will hinder the preformance of the truck its just annoying and allways have a 5/16th wrench in the truck at all times you'll get the idea why

[enook]

UPDATE!

Ok so I bought a new ignition switch and was about to put it in when I noticed some black wires that were spliced in to the other wires. One was spliced in the yellow, one in the pink and one in the pink with white stripe.

For fun I hooked up the new ignition switch without connecting those black wires and the truck actually turned over!!!

HOWEVER, it would not fire up. When I hooked those black wires back in, the same thing happened, it wouldnt even crank.

There is a little black box close to the parking brake that says : this device complies with the fcc..."

What is this black box?

From this new information can anyone tell me what is going on.

Also, while towing the truck the other day I had to get a boost to put the truck in neutral. WHen I was hooked up to another truck I turned the key and it started! I went for a ride and it worked perfect!

30 minutes later it was back to 'normal' and not even cranking. Gotta be the wiring right...I knocked something loose when I was towing.

Anyone?

[bonkers902]

Originally Posted by enook

UPDATE!

Ok so I bought a new ignition switch and was about to put it in when I noticed some black wires that were spliced in to the other wires. One was spliced in the yellow, one in the pink and one in the pink with white stripe.

For fun I hooked up the new ignition switch without connecting those black wires and the truck actually turned over!!!

HOWEVER, it would not fire up. When I hooked those black wires back in, the same thing happened, it wouldnt even crank.

There is a little black box close to the parking brake that says : this device complies with the fcc..."

What is this black box?

From this new information can anyone tell me what is going on.

Also, while towing the truck the other day I had to get a boost to put the truck in neutral. WHen I was hooked up to another truck I turned the key and it started! I went for a ride and it worked perfect!

30 minutes later it was back to 'normal' and not even cranking. Gotta be the wiring right...I knocked something loose when I was towing.

Anyone?

that device sounds like a remote starter brain box might have to get a person that does electrical to look at it. but check the wire coming from the alternator my 96 blazer did that and it was a broken wire that stoped it from cranking

[enook]

[Airjer_]

Looks like an aftermarket remote start/alarm.

Are you sure you just don't need a battery?

[enook]

Originally Posted by Airjer_

Looks like an aftermarket remote start/alarm.

Are you sure you just don't need a battery?

I just put a brand new battery in.

Like I said, when those black wires are disconnected, the truck will crank over but not fire. When they are connected, the truck wont even crank over.

Before I changed the ignition switch every once in awhile the truck would crank AND fire, it seemed like when I jiggled a wire loose or something.

Is there anyway to UNINSTALL this item and put things back the way they are supposed to be>??????

[Airjer_]

Originally Posted by enook

Also, while towing the truck the other day I had to get a boost to put the truck in neutral. WHen I was hooked up to another truck I turned the key and it started! I went for a ride and it worked perfect!
Anyone?

Are you sure you have not worn the battery down so that it no longer has enough left in it to crank and get the engine management up and running at the same time. If you jumped it and it started I would try the jump start again to see if it was just a fluke or if it will actually start with the jump again. If it starts with a jump I would seriously consider the battery.

either that or its the fact that you started it in nuetral. You did something different when you jumped it and it started. Figure out what the difference was and your problem will be figured out!

[enook]

Originally Posted by Airjer_

Are you sure you have not worn the battery down so that it no longer has enough left in it to crank and get the engine management up and running at the same time. If you jumped it and it started I would try the jump start again to see if it was just a fluke or if it will actually start with the jump again. If it starts with a jump I would seriously consider the battery.

either that or its the fact that you started it in nuetral. You did something different when you jumped it and it started. Figure out what the difference was and your problem will be figured out!

Tried all that. Trust me I tried it with a boost again and nothing. Like I said above I just bought a brand new battery but it didnt fix anything.

I have a feeling the problem lies with those black wires. When unhooked the engine will crank but not fire. When hooked up it wont even crank.

Is there anyway for me to keep those black wires UNHOOKED but to get the fuel pump to engage? Right now it seems that there is no signal being sent to the fuel pump or even to send spark...

I bet you if I hooked those black wires back in, jiggled all the wires or towed the truck around fofr a bit it would fire becuase something was either knocked loose or put back in place.

Black wires spliced into yellow, pink and pink/white. What the heck are they?

?!?!?!?!?