Changed shift know failure, now no crank no start???

I attempted changing a gear shifterknob in my 99 sr5, which did not fit, reinstalled push button back in, bolted it together and tried to crank my truck with no luck, opened hood and literally broke the cover off the starter relay under the hood, the only way to crank the truck was by pinching the wire together on the relay and after a week, it won't start again now, barely turns over. .

Changed the ignition switch, the starter relay, 2mo the ago I did the starter, battery, coilpacks, plugs, wires,alternator, and mainfuse, [parts store did not have 80amp but referred me to 100amp, anyways now I need help.... please somebody know what I'm talking about....

 

NEVER put in a higher main fuse. You're just asking for your rig to burn to the ground.

Why did the main fuse blow?

Why did you replace the starter? Was it tested bad?

Why did you replace the coil packs, plugs and wires? Was the car misfiring?

Why did you replace the alternator? Was it tested bad?

Why did you replace the battery? Was it tested bad?

Stop. Just. Stop.

Stop throwing parts at the problem. Stop pinching relay wires together. Diagnose the issue.

When you get in the car (key out of the ignition), and turn on the lights\hazards, do the lights work? Do things like the dome light work when you open the door?

When the key is in and tuned on (not trying to start the car), does the radio work?

If, with the key on, can you read codes via the OBDII port? If you don't have a code reader buy a simple one.

If you can read OBDII codes, are there any? If you can't read from the port, you have a bus failure (wiring) or ECM failure (computer).

Next up would be to troubleshoot the starting system.

You will need to get the relay tested. Did you replace it when you broke the top off? I think Autozone or a big box auto parts store can test relays.

If that's not it, it's probably going to be wiring related. You will need to check all the harness grounds. You will need to check to make sure there are no shorts in the wiring to the starter. If, when turning the key to start the car, the battery voltage goes to zero...you have a short in the starter circuit. Use a multimeter to verify there is no continuity from the starter power wire to ground.

The starting circuit is fairly simple (although I have never had to go this deep on this car). The key when turned, sends a voltage to the starter relay, which then connects internally and sends gobs of current to the starter. If the pin on the starter relay is getting no voltage then that's an issue between the relay and the key. If you still have the busted relay and can test the main internal connections...one should have 12v. If not, then the wire from the battery to the relay is burnt/broken somewhere.

Put the correct main fuse back in.

 

Originally I had a problem with the electrical on my foglights, and a female fried my main fuse while jump starting her jeep one night while I was at work, I replaced the main fuse myself out of my 99 parts be runner shared between me and a few friends, that started a chain reaction, the battery went dead, replaced under warranty, starter was tested bad, replaced it, alternator went out about the same time,yes it tested bad, afterwhich I was riding around one night and pulled up at a store and just all of a sudden it no longer cranked, it wouldn't do nothing after 5days it was found out there was a hot wire touching under the passenger floorboard, which the mechanic never showed me what wire it was, needless to say I had already I stalled the new neutral safety switch as the truck was not starting in park at all, after this it drove just fine until I tried changing the shifter knob and it has been sitting 3very since. The plugs, coilpacks and all was to get my power back, it lost a lot of power from 160k-170k
.

I tried obdll and all it's showing is port error, cannot continue, I'm not very good with the volt meter but I think I can check continuity, radio works with key on, dome light works when I open doors. Also, the dashboard isn't lighting up at all, somebody really done a number on the electrical trick of this truck I think, and my sunroof doesn't work.

 

Maybe someone knows, but *if* the ignition switch has to get the ECU to energize the starter relay and the ECU is not talking via the OBDII port...you need a new ECU. Or figure what wire is shorting out the ECU.

Check all fuses for the ECU. Check all fuses inside and out regardless.

 

All fuses are good, and I replaced the main fuse to 80amp like it called for , still not energized..

 

You'll need to get the ECU working again. It's rare but it may be bad.

You'll need the Factory Service Manual for your year for the wiring diagram and you'll need to test out all the powers and grounds going to it.

If you just swap in a new ECU and you have a short that fried the old one, you'll just fry a new one.