Question about 1994 Chevrolet C/K 3500

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Starting system I need to know a starting system from ignation switch to the starter motor. I can,t find a scematic diagram enywhere. It won,t start. starter motor ok. I can by pass it and start. I can,t find any relay outside on the firewall.( sorry two relays. One for fuel pump, but another axuarly) Is there anything else? jimyanky@yahoo.ca

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1999 f expedition [it craincs but will not fier ]

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If it's an automatic, it has a Transmission range Switch (neutral safety switch). If it's a manual transmission, it'll have a clutch start switch. Here's the schematic:
starting system - 0c0b8b5.gif

Posted on May 22, 2008

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Have 2005 pt cruiser full battery charge wont start


The starter motor has two voltage circuits. One comes from the battery, hot all the time. The other circuit goes hot with key in the start position and starter relay is energized. The starter motor grounds through the engine block. If voltage and ground for the starter motor are good, then I would have to check starter motor. You can use a test light to check voltage. Any testing at starter motor make sure tranny is in park or neutral and parking brake is set.
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1998 Sable will start and drive then after shutting it of won't start not even try to turn over for hours maybe a day then will start right up


When it won't start testing the electrical systems is the proper way to find a fix . Using a DVOM - digital volt ohm meter and power flow diagrams . Using voltage drop testing !
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Do you know what a wiring diagram is ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Click on engine under system then under subsystem click on starting .Then click on the search button , then on the blue link . This is a wiring diagram of the starter electrical circuit. Do you know what ignition switch is ? the electrical part. , how about the starter relay , transmission range sensor ! There is one thing you can try , move gear selector to neutral an see if it starts then . If that does nothing ,check for B+ voltage going at the starter relay . Jumping pins 30 & 87 at the relay socket , where the relay plugs into . will cause the starter to engage an spin the engine . If you look on the bottom of the relay you will see four sets of numbers 30 & 87 - 30 should have B+ voltage , 87 goes to the S terminal on the starter solenoid . An 85 & 86 are the control side .86 at the relay socket comes from ignition switch through the trans range sensor to the starter relay coil ( electro magnet ) . Watch these videos too .
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Need a wiring digram for a 2004 Ford Explorer starting system


Sorry but I can't help with a diagram.

I think your car could be a CANbus system where there is no direct connection between the starter switch and the starter motor. Starting is likely to be controlled by a relay which is energised by an ECU if the immobiliser has been disarmed, the starter switch only serving to send a signal to a nearby computer for starting to take place.

If this is your system it is possible to check the switch, relay, starter in the traditional manner but glitches in the system will need specialist diagnostic equipment to locate.

Apologies if I have guessed wrongly...

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1 Answer

2005 starter wiring diagrams from ignition switch to starter soliniod


The ignition switch does not go to the starter solenoid . Pin 87 at the starter relay sends B+ voltage to the starter relay . Do you know what a starter relay is an how it works ? The ignition switch is an input to the PCM - engine computer . When the PCM sees this B+ voltage from the switch it energizes the starter relay sending B+ voltage to the starter solenoid . http://www.bbbind.com/free_tsb.html free wiring diagrams !

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12 bmw 318 on off ignition button gives a buzz when I press to turn off ignation after driving car


It is very prudent and sensible of you to have concerns about this.

I would check with BMW service if that is an issue with that system and, in particular, whether or not it is an indication that the there might be an impending failure. Unless there is some kind of back up key that can enable you to operate the ignition and starter motor to start the car if the starter button fails, such a failure will leave you stranded. On some vehicles with this starter button system, failure of the starter button definitely will leave you with no other way of starting the car..

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2 Answers

Will not turn over! Starter won't engage!!


When you turn the key to on, do the dash and warning lights come on? This would verify power to the ignition switch.

It's like this: you have a positive battery cable with a lot of juice connected to the starter, but not to the starter motor. It is only connected to the starter motor when the start wire out of the ignition switch energizes the starter solenoid, mounted on top of the starter.

So you check the small wire to the starter for power with the key held in start. If it has power then, the starter or the solenoid is probably bad- as long as the battery is charged and the battery connections and starter connection is good.
If you have no power on the small wire in start, trace the start wire back to the ignition switch. You may need a wiring diagram- there is often a start relay, a park/neutral safety switch with automatics or a clutch safety switch with a manual transm., and sometimes a "crank" fuse. All or some may be in the path of the start wire from ignition switch to the starter solenoid. You would need a voltmeter or test light to check this circuit. If you want more help, post back with make, model, year, and engine, and I could look at a wiring diagram for your start circuit, or I could post a link for you to see the diagram.

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While driving the a/c quit getting cold and the gearshift orange indicator light disappeared. The truck ran to its destination and I shut it off. I tried to start it again but it would not turn over. I...


Starter motor relay , transmission range switch , wiring ! Do you know what a wiring diagram is ? How to read one ? How to use a DVOM - digital volt ohm meter ?
How to voltage drop test starter motor circuit
do you know what a relay is ? how to test one .
VEHICLE RELAYS Operation Diagnosis
You can view free wiring diagrams here http://www.bbbind.com/free_tsb.html enter the vehicle info. year , make , model , engine size . Under system click on engine , then under sub system click on charging system . click search button ,one link will pop up , click on it . First diagram is starter circuir . If starts jumping at the starter the problem is on the control side . trans range switch , starter relay ,blown # 6 40 amp fuse in the under hood fuse / relay center .

Mar 26, 2017 | 1998 Chevrolet C/K 3500

1 Answer

STARTER MOTOR UNABLE TO CRANK WHEN IGNATION SWITCH ON


look at the source for power check from the battery down to the starter connections as well as the fuse panel check their should be a crank fuse in the system

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1 Answer

How do you know if you need a starter?


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