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Starter relay my daughters battery moved on a turn and grounded itself to the positive post for 12 hours initially the engine cranked while making a rattling noise, a mechanic looked at it and explained the car is no good. well now there is no crank and I think his diagnoses is wrong. I checked and replaced all the blown fuses changed relays but the relay described as the HEAD (relay Toyota 90987-02006 056700-6912 12v Denso)in the engine compartment now rattles when battery is connected HELP Martin 773-419-1427

Posted by Anonymous on

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

SOURCE: 2003 Caravan No Crank, 3.3L

This is a bad PCM. Try to disconnect the security system first and if it still does not start then it is the PCM.

Posted on Aug 11, 2008

justuscc
  • 360 Answers

SOURCE: car will just turn over

main relay contacts get burned up...... common on the hondas its under the drivers side dash

Posted on Oct 10, 2008

  • 14036 Answers

SOURCE: my buick regal doesnt send signal from pcm to crank relay.

check pcm with a scanner to see if crank and cam sensor are working.

Posted on Apr 17, 2009

polarcycle
  • 1392 Answers

SOURCE: Won't crank, relay good.

Fuse would be in the outside fuse box. Look for the one labeled starter. If you are not getting power to the starter, could be an ignition switch.

Posted on May 29, 2009

motor1258
  • 6674 Answers

SOURCE: Describe your 2002 Chrysler Town &

Safety neutral switch o.k.? Tried moving shifter through all gears while holding key in start position?

Posted on Aug 03, 2009

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2002 chevy trailblazer and it will not crank or start and the key has gotten stuck in the ignition. I also got a jumpstart and it still didn't start. What is wrong, Please?


Could be a number of thing's , can you do automotive electrical testing ? Do you know if starting is PCM / ECM controlled or BCM controlled ? Do you know what these are ? BCM - body control module , PCM/ECM - engine computer !
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.
Do you know what a park neutral safety switch is ? What do you mean key stuck in ignition ? Can't turn the key to off position , or you can an the key will not come out ?
Your best bet , take it to a qualified repair shop .

Apr 04, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

I have replaced the starter relay and still have the same problem.


it could be a bad wire or connection to or from the relay ,or it could be a ground strap has rotted away. or it could be the starter itself not engaging when it recieve the signal to do so.. these things can be checked with the use of a voltmeter and a ohmmeter to check where the issue might be. (just get a cheap little multimeter if you dont already have. they are always useful)

this might be easier if you have a friend to help you.
first go over and look at all the ground straps (the woven metal straps or wires connecting the engine block to the chassis.. and the one between the negative battery terminal and chassis for corrosion damage or corroded connections. you can also check this by using a ohmmeter and measuring the resistance between the outside of the starter (you can probe any metal parts on the engine block. but doing it at the starter will reduce the chance for incorrect results) . and the negative battery connection. there should be a very low resistance.
next you will need to use a voltmeter. connect the positive probe to the big terminal with the big cable on the starter. make sure not to short anything. and the other probe to ground. here it should always be almost the same voltage as the battery is (battery voltage varies a little, but around 12 v).check that the car is in park or neutral. handbrake should be on. then try cranking a few times until it fails to crank.. check to see if it has voltage (here is where a friend is helpful) if thats ok. then we move the positive probe to the small terminal on the starter . this terminal is where the starter gets its signal from the relay to engage and start cranking the engine. have a friend either turn the key or check to see if the voltmeter say 12v while its failing to crank.
if it has 12 v but not engaging and cranking. then the issue lies with the starter unit itself. this is the most likely point of failure

if it does not have 12 v at the small terminal of the starter you should probe to see if one the legs of the relay has 12 v.all the time. , just remove the relay to probe the contacts beneath.

by looking at the relay you should be able to find out what leg is normally open (NO) . use the ohmmeter and connect from this leg to the small terminal on the starter (if you are unsure of what you are doing here it is reccomended to have a multimeter at voltage measuring to avoid damaging the multimeter by connecting it to the wrong connection. it will not survive it if you send 12 volt through the ohmmeter. and the voltage measuring will not allow enough current to accidentally make the starter crank) this wire should have a very low resistance.. if it does not. the wire or a connection has failed at either the starter end. or the relay end

good luck with the repairs :)

Oct 25, 2016 | 2001 Lincoln LS

1 Answer

I have a new battery for my car and it will not start crank just click.The car has very low mileage.


Without amp rating on charger let's move on to other items to look at.
Are the connections to battery tight and clean. Make sure you have cleaned both posts. Make sure there is no corrosion on cable ends. Also look at the wire that runs to ground , insure that is clean as well. Reconnect battery!
Turn off all accessories (radio, heater, A/C). When you open doors does the dome light turn on.
Does the dome light dim as you crank / click.
Can the car be jump started? If yes then I would lean to a weak battery. Without test equipment ( voltmeter) tough to varify.
You didn't explain why you replaced battery, but a purchased battery usually will normally be enough.
Make sure the battery size (amp hours) is rated for your engine size.
make sure wires to your starter are also corrosion free. A bad ground won't allow enough current flow giving you the click no crank.
try turning the key on off rapidly thus making starter move slightly and if it starts you are probably in need of new starter. The starter relay is easy to replace and cheaper so you can start there.

Sep 23, 2016 | 2003 Pontiac Grand Prix

1 Answer

Where is the neutral safety switch on a 2002 Pontiac Bonneville, located


Circuit Description
Moving the ignition switch to the START position sends a 12 V signal to the PCM Ignition Crank Sense. The PCM verifies that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START relay. When the START relay is energized it allows battery positive voltage to the starter solenoid S terminal.
Turn the ignition switch to the START position.
Does the engine crank?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

Is the security indicator flashing?
Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent
Go to Step 4

4

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Starter Relay Command parameter in the PCM data list.
  4. Turn the ignition switch to the START position.
Does the scan tool display Yes

5

  1. Turn ON the ignition, with the engine OFF.
  2. Verify that the transmission is in Park or Neutral.
  3. With a scan tool, observe the IMS parameter in the Transmission data list.
Does the scan tool display Park or Neutral?
Go to Step 12
Go to Transmission Internal Mode Switch Logic in Automatic Transaxle - 4T65- E

6

Turn the ignition switch to the START position.
Do you hear the STARTER relay click?
Go to Step 9
Go to Step 7
Your best bet is to take your vehicle to a qualified repair shop. Before you replace a part an find out that's not what's wrong . If you new how to test the starter circuit , you would start at the starter relay .

Jun 15, 2016 | Pontiac Cars & Trucks

1 Answer

Car wont start have replaced starter motor and relay and igniyion switch still wont start


What is year--make--model?
Make sure battery has a full charge and battery connections are all good. If your saying starter motor won't crank, check voltage and ground at the starter motor. Usually two voltage circuits at the starter, one comes from the battery, hot all the time. The other circuit goes hot with key in the crank position and in your case, I suppose wired through the starter relay. The relay has two circuits, the load side and control side of relay. The control side of relay needs voltage and ground to energize the relay. The load side of relay, in a diagram shows a line with arrowhead, when relay is energized, that arrowhead line moves to other terminal and that circuit carries voltage to starter. The voltage for load side of relay is usually hot all the time. I can't rule out neutral or clutch switch. The starter motor usually grounds through the engine block. If all voltage and ground circuit for the starter are good, I'd have to make sure the engine isn't seized.
Any testing at the starter, make sure tranny is in park or neutral and functional parking brake is set.

Mar 06, 2016 | Cars & Trucks

1 Answer

Why won't my 2004 Honda CRV Crank it has plenty of volts and everything (headlights, dome lights)is bright?


You have a dirty or loose connection either between the battery's negative post and engine ground (most likely) or between the battery's positive post and the starter solenoid. You can determine which by setting your meter to "DCV" or "DC Volts" and putting one probe on the battery's negative post (the lead POST, not the clamp) and the other probe on the alternator's body. Try to crank the engine that way - your meter SHOULD insist on reading 0.0V, but if you have a poor ground connection it may read as high as 12V.

Likewise, read volts between the battery's positive POST and the positive connection to the starter solenoid while someone tries to crank the engine. Again, it should read 0.0 but if you have a poor connection it'll read significant voltage.

Aug 04, 2014 | 2004 Honda CR-V

1 Answer

2004 Envoy XUV doesn't always crank.


I want to see if i catch your drift ! When you turn the key in the ignition switch to start , nothing happens ? Have you tried moving the gear slector to the neutral position to see if it starts then ? Park neutral safety switch problem , maybe .
Here is a description of how it works or how it's suppose to work .
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.

May 13, 2017 | 2004 GMC Envoy

1 Answer

1990 f150 pickup stater keep geting jamed


Test, hook up a starter relay switch, connecting one clamp to the positive battery, and the second clamp to the starter motor. Turn on the ignition switch, make sure tranny is Parked (or neutral if manual tranny).

On some truck/cars with manual tranny, the clutch MUST be depressed to close the circuit to the starter motor. When you hit the button on the starter relay switch, it closes a circuit to allow power from the battery to go to the starter motor. If starter doesn't turn, check the battery ground terminal to make sure its tight. Before you go out to buy a starter relay switch, check both the negative and positive battery clamps are tight. Check the ground end of the battery to make sure its also tight. The ground is often the chassis, or the engine block.

If the engine appears to crank over at the speed it normally did when it starts then the battery and starter are OK. If it cranks over slower try jump starting it from another vehicle, let the other car run for a few minutes first to charge up your battery. If the engine cranks over, an engine needs three things to start, mechanical integrity, the engine must be able to develop adequate compression, it must then get spark and fuel. Some basic diagnostic tests would have to be done to determine what is wrong.

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Jul 19, 2010 | Ford F-150 Cars & Trucks

2 Answers

When i turn the key hear a clicking sound. Lights flicker as does security light. Dash gauges move up and down no turn over at all of engine. Replaced starter,tested battery,and alternator. No starter...


try turning the engine over by hand if it will not turn sounds like seized crank bearing.grab the harmonic wheel attached to crank shaft and use that to try and turn engine,

Oct 07, 2009 | 2002 Lincoln Town Car

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