Holden cruz 2010 wont start,have checked battery, relay,fuses, has full ignition but dash goes dead on sart up

head lamps work, jumper cable jump starts fail>?y/n?
ah a simple failure, not dead engine complex.
this has only 6 causes, of no crank. using voltmeter makes the job near childs play. if you do that, guessing will be $$$$$$$
A/T trans or M/T auto or stick , not the same.
you shorted out wires under the dash with that key act.
that blows fuse if lucky or blows up very very expensive electronics. nobody here knows what you blew out.
only using meter finds this. a voltmeter (DMM)
all one word left off, I broke off the metal key inside the ignition switch so then hot wired the switch
bingo now I under stand what you did.
a new ignition switch is best.
I think there is no IMMO here
I found a free service manual (real) online
let me see what fuse you blew up.
if you short out the key switch or starter relay
yes the fuse link blows. for sure.
fuse 19 is the starter fuse, not blown.
volt meter check IGN switch has power white wire is power in,if dead, link is blown
turn to ST start, and ST pin goes to 12vdc
as does starter out relay pin B/Y to starter

now the free manual
https://procarmanuals.com/pdf-online-nissan-300zx-1993-service-manual/


now you have full schematics in the EL chapter,.
see 1 below in part.



start path fuse battery must be good.

Hi Chris This sounds like a return to Holden for repair. The chance is the fault is the ignition barrel It may need replacement. I have known in the past where people after stopping the engine and exiting the car grab the steering wheel and put there weight against the locking pin in the ignition barrel via the downward force on the steering wheel this can bend the pin and then its a matter of time before it locks up. The only way to make a correct diagnosis is for someone to to look at your car. I hope this information is of some help Good luck

Sounds like a weak starter or weak solenoid

Check your ecm fuse, or your main power relay fuses, basically just check all the fuses under the dash and under the hood, if there are a few relays under the hood, you can try and swap the ac relay with the power relay as long as they have the same numbers on them. If all the fuses are good, it is most likely a relay, or the ignition switch itself

With electrical issues, I usually pick one component that has a problem, then check the wiring diagram for that component. If that circuit is fuse protected, so much the better, then you check fuse circuit for voltage. Some fuse circuits are hot all the time, some go hot with the key on. If the fuse circuit gets ignition feed, meaning it goes hot with the key on, have to check feed to and from ignition switch.
Sometimes intermittent problems can be hard to track. Have to do testing when problem is ongoing.

Battery cable connections ? Need to hook up scan tool to see if the modules on the vehicle are communicating ! Voltage drop test starting system . Check START 1 relay in underhood fuse/relay box ! Check PCM/BATT fuse 10amp ! Check power at relay ! This video shows how ! VEHICLE RELAYS Operation Diagnosis If you don't know, best take to a ASE certified technician before you break it ? How to Test and Troubleshoot Starter Problem

It could be the battery it should have 14.5 volts. Or the connection. Clean all battery points

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jim_c09d8140f32619a8

replace battery cables could have bad ground cable.if see dash lights on when turn ignition to on position.check starter fuse or relay or remove starter check for faulty starter solenoid or starter.if starter okay and fuse starter relay okay ignition fuse and switch okay see dash lights could have problem in the theft security system need have vechicle code scan see if theft security fault code show up.

Check ALL Power and Ground connections coming off the Battery to circuit anchor points. Ignition and Services fuses for a Power supply. If all proves ok, then go to the Main Ignition control Relay and check the condition of the Pins and Recepticles. That is where your apparent problem may eventually be. But travel the initial route first, looking and feeling for Loose or Dirty connecting points.
Regards, David

you need the electrical part of the ignition switch this is a common problem on this model.