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joseph enloe Posted on Feb 23, 2018
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2003 trailblazer v8 4wd crank but no start. Fuse4 under hood panel has no power. It should be hot in run and start key position. Where does it get power i cant find power side prints

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JOHN LAPIER

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  • Chevrolet Master 2,602 Answers
  • Posted on Mar 24, 2018
JOHN LAPIER
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Joined: Oct 01, 2010
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It like this the battery supply's the power to the starting motor to crank the engine over that is a good point to start checking .
However the ignition switch opens the circuit like a light switch on your wall open closed.
Now you need to figure out what works when the key switch is in run position do you have major power windows seats door locks if so the battery is fine .If not you need to take a good look at the battery TEST IT if that's good then look at the fuse box any fuse that would stop power flow would a 20 to 30 amps yellow or green the # will be on the back of it
Next you need look at main connections and grounds like from the battery to the starter and solenoid yank on the cable to the starter from the battery check your main ground cables fusible links look for corrosion.
Then you can start thinking about what you need to take APART.






























3 will

5 Related Answers

Anonymous

  • 40 Answers
  • Posted on Aug 06, 2009

SOURCE: 1999 Altima will not start, no power to Crank Position Sensor

The crank sensor is only a reference and shouldn't cause it not to start. I would look elsewere for your problem ie camshaft position sensor which is built into the distributor. This is amore likely cause of your no start condition.

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Anonymous

  • 3741 Answers
  • Posted on Oct 24, 2009

SOURCE: My 2000 Ford Expedition has

If it is a single click, the problem lies in the starter solenoid or relay. If it is several clicks in succession, the battery may be low or there may be a loose cable. ---------- also try this :-- Please make sure the battery is fully charged before doing this test! Also make sure all the connections on the starter, battery and cable ends are tight and clean! this is important!! This won't be fun to test but it will tell you if the starter is good or not. Crawl under the car. (Make sure you use the proper jacks and jack stands!) find the end of the starter (not the end that is attached to the bell housing) and find the solenoid switch. it should have 3 bolts on it. Two large ones and a small one. The top large wire should be the positive battery cable, the bottom large wire should go into the starter and the small wire should be from the ignition switch. Take a wire and hold it to the top large wire on the solenoid. (be careful of the other end of that wire when you have it connected to the top large wire of the solenoid! don't ground this wire. it will turn out badly. take the other end of the wire and touch it to the small bolt on the solenoid end. If the starter is working, the solenoid should engage and the starter will turn. If this happens it is most likely the ignition switch. If the starter doesn't turn, the starter could be bad. ==== Starter Relay Test
Place transmission in Park.
Apply parking brake.
Check for battery voltage between starter relay battery terminal and ground.
Connect jumper wire on starter relay between battery and ignition terminals.
If engine does not crank, connect a second jumper wire to starter relay between ground terminal and good ground and repeat test.
If engine cranks in step 3, transmission linkage is misadjusted or neutral safety switch is defective.
If engine does not crank in step 3, starter relay is defective.
Follow this step by step and you will pinpoint the problem.
--------
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.




Randy Ohler

  • 14585 Answers
  • Posted on Jun 17, 2010

SOURCE: 1993 Plymouth Sundance 2.2L cranks, no start

When you turn the ignition on the pump is energized for 2 to 3 seconds. did you check it like that. it is also energized when cranking the engine. there is a fuse then a relay then the fuel pump. the relay is ran/ energized by the ecm computer. if there is a fuse relay box under the hood you'll need to check there to. good luck

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Anonymous

  • 334 Answers
  • Posted on Feb 17, 2011

SOURCE: I have a 95 firebird.

It's when the security light starts flashing that the infamous "chip" in the key becomes a nightmare to many. Gradually the car begins not cranking anymore or if it cranks it would start and die in a second. Randomly it will do this more and more often until it won't start anymore. VATS, PASSkey and Passlock immobilizer systems are killing cars all over North America, they have a short lifespan and are certainly more effective against owners than thieves. Here is how you save your car
1st trick, Try a spare key that is newer or used less. The pins wear down and so do the keys causing security fail. 2nd trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year. If its shutting down while running, im sorry i have no quick fix... If anything on this page helps you, please remember to comment or give me a thumbs up on the myfixya sight so i can have a better rating to help more people on this. Thanks

Cheap fix: Bypass the chip in your key. Temporary, but effective. Until the TDM (theft deterrent module) in the dash poops out, then you're kinda screwed. I was told that these types of key security systems have a 7-10 year life span. Sucks for us. This link explains the "Key Issue" pretty well.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. They sell a unit for 200 bucks to totally bypass this system FOREVER. life time-money back and all that. Finally did this in my car. Well worth the 200 if you've looked into getting this replaced... Anywhere from 600-1000 bucks. If you do buy this, please purchase it thru this link. The cost is the same, but i get credit for the sale and im trying to earn my money back, as you will be able to do if you buy fron NewRockies and join the free affiliate program. Thanks
----- http://newrockies.ca?ap_id=judd0081 ----- With this fix, you can take that whole Vats, passlock, passkey system out of your car all together. Good info on both sites.

It works for:
Any GM or Isuzu Vehicle with VATS or PASSKey or PASSLock security systems.
If your car has the chip in the key or in the lock cylinder, then you can save it with this Full Bypass.
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Jonah Oneal

  • 14092 Answers
  • Posted on May 02, 2011

SOURCE: 2003 trailblazer keeps blowing pcm

YOU HAVE MANY THINGS THAT CAN BLOW THE PCM FUSE.STARTER RELAY,ALTERNATOR, PARK NEUTRAL SAFETY SWITCH, FUEL PUMP, AND THE PCM CAN BE SHORTING OUT.

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My 2003 Denali won't start I turn the key and just get a fast clicking noise good battery new starter and all power works

Where's the clicking noise coming from ? Under the dash , under the hood in the engine compartment ? Do starter circuit voltage drop test ! When the key is in start position is there constant B+ voltage at the 10 amp crank fuse in the under hood fuse box ? This is an input to the PCM - engine computer to energize the starter relay ! Starter Voltage Drop The battery is good , starter is new ,what about the cables ? watch this video on testing starter circuit !
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Why doesn't it crank?

What do you mean by no crank ? When you turn the key to the start position nothing Happens or the engine cranks but doesn't start an run ? You mite or mite not know that people refer to crank over as starting an running . If when you turn you key to the start position an nothing happens there is a relay in the underhood fuse box .Another thing , you replaced a fuse or the whole fuse box . Starter relay # 47 Do you know about relays ? how they work , power side an control side . The engine computer energizes the relay if no anti-theft system etc... You can go to http://www.bbbind.com/free_tsb.html free wiring diagrams an see what all is involved ! Once you click on link enter your vehicle info an under system click on engine an then under subsystem click on starting system . You can also go to youtube an check out videos on relays , basic electrical trouble shooting , voltage drop testing .Because testing is the only way to find out what the problem is . You should have it check for DTC'S - diagnostic trouble codes as well !
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Jump start trailblazer will run that day but next day it is dead there is a short some where

2006 Trailblazer won't start - Discussion on Topix

www.topix.com > Chevrolet TrailBlazer
Sep 6, 2012 - My 2006 Trailblazer will not start, bought a new battery, still will notstart, not even with a jump. ... i get a jump i drive it and charged the battery it seemed fine but then i went ... Then, next morning, when I turn key, all lights come on and radio... back a day and 360$ well that pos still will crank but will not start. 02 trailblazer a/c problem
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I have a 2004 Chevy trailblazer no start no crank but if I put key on hot wire the starter it will start I replace new ignition switch and new starter relay b

Before you do any thing check for loose or bad connections. Also check you ground connection to engine. Check Fuses, relay and for a Fusible Link open circuit. Now let me explain what a Fusible Link does. They are short lengths of small gauge wire installed between the Battery and the Ignition Switch, or the Battery and the Fuse Panel. They'll melt and open the circuit before damage occurs in the rest of the circuit. I hope this was helpful you.
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My 2003 chevrolet Trailblazer will not start.

What we need to know is if you can here the starter cranking the engine over? If the answer is no than check for power on the smaller wire at the starter. There should be power anytime the key is in the crank position. If there is power replace the starter. If the answer is yes than you will need to check for fuel pressure and spark to determine which is not letting the engine start. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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Starter wire problem

I assume the wire to the starters solenoid has no power going through it. A fuseable link is incorporated inside this wire inches away from the solenoid's connection. Some times wiggling it while someone holds the ignition ket to the starting position will tell you if the fuseable link has an open in it. The easiest way to check by yourself is to use an OHM meter to check the wire for continuity. If the meter reads OL by testing this wire from the solenoids connection and well more than a foot away, the link is no good. If you get a reading of 0000 or better the wire is fine. Then you have a faulty electrical ignition switch instead that needs to be replaced
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2003 Chevy Impala won't start after refueling

There is a couple of problems with Impala's. Crank relay ($15) is unreliable. Lift hood it's on the passenger side under plastic panel and just plugs in. There are some issues with the pass code. Rather than take to a dealer, first place key in ignition and turn to the on position and wait 10 minutes. Often the pass code corrects. There are some issues with the ignition switch in particular with a heavy set of keys. Try blowing some compressed air into the keyhole and using just the ignition key by itself.
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Sounds like you have a bad or burned contact in the ignition switch.
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this is something best left to a qualified repair shop ,Dealer ! This starting system is computer controlled an if you don't know anything about it you could make thing's a lot worst . When you turn the key to the start position , this sends a voltage signal to the PCM through the crank fuse #17 amp located in the under hood fuse / relay box. You could check for B+ volt at this fuse with a volt meter or test light . When the PCM see's this voltage signal it looks for another signal from the PNP - park neutral position switch . If it see's this signal an thier is no anti-theft system problems it will energize the starter relay sending B+ voltage to the starter solenoid .

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