Question about 2005 Chevrolet Equinox

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Car will not start, but the battery and starter are

Car will not star, but the battery and starter are both fine. Have checked the relays voltage going to starter solenoid drops out after about a second. Is there something else controlling this voltage?

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  • 89 Answers

Hi, on most newer than 2000 vehicles, there is a computer cut out to the starter solenoid performed by the security system or theft deterrent system. also the pcm(powertrain control module) or engine computer does have an ignition sense circuit designed to control various functions. perhaps the ignition switch could be causing the problem, bad connection could be the case there. if the theft deterrent system is causing it, the security lamp may or may not illuminate. it maybe stored in the pcm memeory diagnostic codes only. you may want to take to repair shop. .... one more thing to check, if your key has a diode in it(looks like a black chip with a wire through it) check it closely to make sure it is not dirty or wet, or any other contamination of it. the diode is of specific ohms value and if any of the above mentioned things occur to the key, it will lock out the security system. good luck.

Posted on Jun 07, 2010

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Posted on Jan 02, 2017

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1 Answer

Car just clicks when i try to star it


Battery cable connections ? Battery , Starter ? Do a starter system voltage drop test ! Starter Voltage Drop Also do a pin point test at the starter relay ! VEHICLE RELAYS Operation Diagnosis VEHICLE RELAYS Testing from the relay base


Sep 29, 2014 | 2005 Ford Freestyle

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Cant turn ignition over envoy 2002


If you mean that the engine won't turn over to allow the car to start then you probably have a dead battery or bad starting motor or relay. Get battery checked to start. If battery is good check that battery voltage goes to starter through relay, relays go bad sometimes. Finally if voltage at starter then it is most likely the starter that is bad.

Apr 28, 2014 | 2002 GMC Envoy

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08 Chevy Cobalt wont start. Battery is good.?


Is there a warning light , padlock an car symbol lit when it won't start ? I assume it has to be a bad starter? Every time i jump the car it starts up fine.??? It wouldn't be a starter then ! Have the charging system check out . Have a voltage drop test on the starter circuit done . Test from the starter relay . check out videos on youtube , but don't assume anything . Test , Test Test .

https://www.youtube.com/watch?v=WMXENKujYtc&t=6s

Starter Voltage Drop

VEHICLE RELAYS Testing from the relay base

Plus you need to know how the starter system works for the vehicle your trying to diagnose . I 'am a GM tech , Chevy , Cadillac , buick , GMC. Have access to GM factory repair info. Been to a lot of GM training school's . The computers on this vehicle have a lot to do with the starting of the vehicle ,PCM - engine computer , the ignition switch is a low voltage input to the BCM - body control module , which will send a message over the GMLAN serial data communication network to the PCM to energize the starter relay or crank relay .The PCM also has to see a voltage input coming from the transmission range selector switch , showing it's in park or neutral , has to have correct fuel enable password from the theft module etc...
Also it take's is a little corrosion , lose connetion , lower then normal circuit voltage for problem to happen .
Factory service repair manual discription

Moving the ignition switch to the start position signals the body control module (BCM) through discrete inputs from the ignition transducer that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the engine control module (ECM) requesting engine start. The ECM receives a ground signal from the park/neutral position (PNP) switch or a signal from the clutch pedal position sensor notifying that it is safe to start the engine. Ground G105 supplies ground for the CRNK relay coil. The starter relay coil control circuit is then supplied voltage by the ECM closing the switch in the starter relay suppling 12 volts from the CRNK fuse to terminal A of the starter. Ground is supplied to the starter solenoid through the engine block.

The first step in diagnosing a problem like this , hooking up factory scan tool , checking for DTC'S - diagnostic trouble code's , checking inputs to control modules that are in charge of starting the vehicle .

Testing an knowledge is the way to a fix , an testing cost $$$$$


Mar 19, 2017 | 2008 Chevrolet Cobalt

2 Answers

Letter C... Then starting issues?


Check the output voltage of your alternator by starting your car and place a voltmeter to your battery's + and - ... it should read 13.5-14.5 volts, or if your car won't start, have it tested at auto parts store (they will do it for free usually). Im pretty sure your alternator is ok, but it does need checked. If your voltage is within range (give or take 0.5 volts), then you need to check to see if your battery is taking charge. You can have it tested at autoparts store as well, but if your car does indeed start, and your testing it this way, turn off vehicle and let it sit for 30 min. Check battery voltage. It should read 12.5 to 14.5, (no lower than 12.5v) If your battery reads low, then it is refusing to charge and your battery is bad. If your battery reads fine, then you can run this test of your other starter components this way:

1. Make sure your battery is fully charged.
2. Check connections from battery to starter relay.
3. Make sure you have voltage going to the start side (small wire) of the relay with the key in the "start" position.
4. If you don't have voltage going to the start side of the relay (small wire) with key in the start positon, then your starter switch is faulty (under dash usually mounted on top of steering column).
5. If you have voltage to the start side of the relay (small wire) with key in start position, and it don't click when trying to start your car, then the starter relay is bad.
6. If your starter relay clicks, but engine don't turn over, then the starter is faulty.

Dec 09, 2013 | 2003 Buick Rendezvous

1 Answer

My car will not star when i turn the key


If its not cranking at all, then it can be issue with battery or starter.Get the battery and starter voltages checked. It should be approx 12 volts, if battery is properly charged. Check battery and starter terminals voltage with volt meter. ------- If both battery and starter checks out ok and shows proper voltage then its quite possible that problem is ignition switch, the switch is getting short, that is not letting the car to start.------- But if car cranks and battery and starter both checks out ok, then its problem with fuel pump or spark plugs, that needs to be tested, to confirm the fault. --------- This will help.Thanks.Helpmech.

Oct 07, 2011 | Cars & Trucks

1 Answer

Won;t crank


Hi, if the car engine fails to crank, there is a fault in one of the components in the battery/ignition/starter circuit. Low battery (Check battery voltage, recharge if low, or jump start with another vehicle or battery charger). Bad starter relay/solenoid (Check for voltage at relay, if relay has voltage but there is no "click" when key is turned to start, replace relay). Bad ignition switch (Check to see if voltage reaches starter relay/solenoid when turn to start. If not, check for open P/N switch and brake or clutch pedal switch. Replace ignition switch if defective).

May 26, 2011 | 1994 Dodge Stealth

1 Answer

I have a 2003 Saturan Ion that won't start


Hi, this is what you should do when your car won't start. Diagnosing a no-start condition requires a logical approach to figuring out what might be preventing your car from starting. First, if the engine won't even crank over when you turn the ignition to START, your car obviously won't start.
When you turn the ignition key to start your car, voltage from the battery flows through the ignition switch to the Park/Neutral safety switch and/or brake pedal or clutch pedal safety switch (you have to push the pedal down before the circuit will complete) to the starter relay or solenoid. When the relay or solenoid is energized by voltage from the ignition switch circuit, it closes a contact that routes more power from the battery directly to the starter to crank the engine. The starter motor spins, pushes the starter drive gear to engage the flywheel and cranks the engine.

If the engine fails to crank, there is a fault in one of the components in the battery/ignition/starter circuit. Check it out.....
  • Low battery (Check battery voltage, recharge if low, or jump start with another vehicle or battery charger).
  • Loose or corroded battery cables (Inspect, clean and tighten BOTH ends of BOTH battery cables).
  • Bad starter relay wiring connections or ground connection (Inspect, clean, tighten wiring connections).
  • Bad starter relay/solenoid (Check for voltage at relay, if relay has voltage but there is no "click" when key is turned to start, replace relay).
  • Bad starter (Jump battery voltage direct to starter to see if it spins, or remove starter and have it bench tested at auto parts store).
  • Damaged starter drive or teeth on flywheel (Remove starter and inspect drive gear and flywheel teeth, replace damaged parts if necessary).
  • Bad ignition switch (Check to see if voltage reaches starter relay/solenoid when turn to start. If not, check for open P/N switch and brake or clutch pedal switch. Replace ignition switch if defective).
  • Open P/N safety switch, or open Brake Pedal Safety Switch (automatic transmission) or open Clutch Pedal Switch (manual transmission). Bypass switch with jumper wire to see if engine cranks, or use test light or voltmeter to check for voltage passing through switch when ignition is turned to start.
  • Engine seized due to bearing failure or internal damage (Use socket and long handle to see if engine can be turned by hand, if not engine is locked up).
  • Engine hydrolocked due to coolant leak from leaky head gasket (Use socket and wrench to see if engine rotates, remove spark plugs and see if coolant comes out or engine can not be cranked with plugs out).

Dec 02, 2010 | 2003 Saturn ION

1 Answer

My car does not start or turn over. The radio works and so does the fan.


When you turn the ignition key to start your car, voltage from the battery flows through the ignition switch to the Park/Neutral safety switch and/or brake pedal or clutch pedal safety switch (you have to push the pedal down before the circuit will complete) to the starter relay or solenoid. When the relay or solenoid is energized by voltage from the ignition switch circuit, it closes a contact that routes more power from the battery directly to the starter to crank the engine. The starter motor spins, pushes the starter drive gear to engage the flywheel and cranks the engine.

Low battery (Check battery voltage, recharge if low, or jump start with another vehicle or battery charger).
Loose or corroded battery cables (Inspect, clean and tighten BOTH ends of BOTH battery cables).
Bad starter relay wiring connections or ground connection (Inspect, clean, tighten wiring connections).
Bad starter relay/solenoid (Check for voltage at relay, if relay has voltage but there is no "click" when key is turned to start, replace relay).
Bad starter (Jump battery voltage direct to starter to see if it spins, or remove starter and have it bench tested at auto parts store).
Damaged starter drive or teeth on flywheel (Remove starter and inspect drive gear and flywheel teeth, replace damaged parts if necessary).
Bad ignition switch (Check to see if voltage reaches starter relay/solenoid when turn to start. If not, check for open P/N switch and brake or clutch pedal switch. Replace ignition switch if defective).
Open P/N safety switch, or open Brake Pedal Safety Switch (automatic transmission) or open Clutch Pedal Switch (manual transmission). Bypass switch with jumper wire to see if engine cranks, or use test light or voltmeter to check for voltage passing through switch when ignition is turned to start.
Engine seized due to bearing failure or internal damage (Use socket and long handle to see if engine can be turned by hand, if not engine is locked up).
Engine hydrolocked due to coolant leak from leaky head gasket (Use socket and wrench to see if engine rotates, remove spark plugs and see if coolant comes out or engine can not be cranked with plugs out).

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2 Answers

My 2004 330ci won't start, does not turn over. The battery is fine, all electrical in the car work fine, plus trying to jump car does not work & a green light is showing on the battery in the truck....


If the battery is fine, why jump it? Faulty thinking to state or think: all electrical in the car work fine. If it did the starter motor would be turning the engine over. The starter motor work on electrical...not all is fine.

check: 1) 60a starter fuse/relay. 2) voltage to starter when turning key to activate starter motor, this will rule out ignition switch or relay. 3) apply direct voltage to starter motor to detect bad starter motor.

Jul 02, 2010 | 2003 BMW 330

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My car was a bit sluggish to start then 1 day wouldn't start nothing there at all tried it tem min later and it started and has been fine til the other day went sluggish to start drove to a few places then...


check/clean battery terminals, if ok check starter wires for voltage(while turning key to start) and tightening or corrosion. If all check out ok replace the starter. If you have no voltage at the starter check your relays and ignition switch. Hopefully this helps

Aug 19, 2009 | 1998 Nissan Maxima

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