Have replaced battery, starter, solenoid - now 3 weeks later it won't start again. my odometer flashes on and off - could this be my computer going bad?

Need to know year make and model

Sounds like you have a weak battery, or possibly a bad alternator. The fact that you were able to drive it for 2 days before it died again leads me to believe that it is most likely the battery. You can test the battery by looking at voltage across the terminals when you try to start the car, if it\'s less than 12 volts your battery needs to be replaced. If your battery is more than 5 years old it should be replaced anyway. Good luck, let us know how it goes.

I've had the same problem. The dealer is trying to tell me the inverter needs to be replaced because of me charging my Iphone in the van. They already tried replacing the Win Module but that didn't work.

change the wires that go to the starter i had the same problem fixed now with no problems

One of two things. Starter (or starter solenoid) or Neutral Safety Switch. Check the starter by disconnecting the EFI relay, then jump a wire from the positive term of battery to lug on starter solenoid does it crank okay? If not, then check the NSS, located under the airbox, can be adjusted using the offset bolt, just a tiny bit at a time, still no start? replace the NSS and adjust as necessary.

check your starter solenoid - replace if needed.
check the ignition switch (positive wire that goes to solenoid) - re-connect if loose.
or... check your battery- if below 12 volts replace it.

verify voltage and start signal to the starter when the truck won't start or click. most likely the starter solenoid has gone bad and will not engage the starter after the engine has warmed up.

If the brushes in the starter are worn out then the solenoid on the starter can't work.It needs to go to ground through the brushes to engage,i suggest that you replace the brushes in the starter.If i'm wrong then you need a starter solenoid switch,the one on the starter.

Load up your battery and try again.

I can think of 2 possibles,it could be a bad battery cable or an intermitent short in the starter solenoid, check or have the battery cables and there connections on both ends first not only are they a cheaper fix but the problem you describe sounds like a current flow issue.Test them with or have them tested with an ohmmeter they should show o ohms resistance,and while not attributed to the problem I do not reccomend using Bosch spark plugs of any variety,the best plugs for any Japanese vehicle are NGK's,this comes from my personal experience with them and other techs that I have worked with.