2003 voyager lx, won’t turn over, starts when it feels like it, changed starter, starter relay, and ignition switch nothing helps.

You could check for power on the small orange wire at the starter solenoid on the starter motor-with the key held in start position. Should have power there in start. If you do, take starter off to be tested. If no power, signal is lost between ignition switch and the solenoid. Next find the starter relay under the hood. Hold your finger lightly on it while someone turns the key to start. If you feel a click or movement, check orange wire from there to starter solenoid. If nothing at the relay, move to the starter clutch pedal position switch- a simple on/off switch-check for power to the switch with key held in start. With clutch pedal pressed, it should pass power on to the starter relay, with key in start. If you have no power at the clutch switch in start, between there and the ignition switch is the Burglar Alarm Relay and the BCM box. The start wire out of the ignition switch goes to the alarm relay, and another wire from relay goes to BCM (body control module) to activate the relay so power will pass from ignition switch to clutch switch. That's all, Nathan, pretty simple but then again, not...better invest in a test light or digital volt ohm meter (DVOM). Good for checking electrical circuits, hope its not the alarm or BCM.

Is the battery at 12.6 volts,old or dead?

Cables loose?

Starter Solenoid bad or starter bad

I would check the neutral safety switch next. There may be a starter relay in the fuse box too.

If the ignition switch is good and you are certain it works fine,did you realize there is a TSB for this condition when ever you replace a infiniti starter or even some Nissan you are supposed to replace the starter relay also,but it goes further than that you also need to rplace the Throttle control relay with the starter relay.

does it turn over or does it do nothing at all

dont renew/replace the switch until you have changed the starter relay.

Check relay in relay box under hood on driver side near strut tower. Map should be on underside of cover of relay box. Also, try moving shifter through all gears slowly as you hold key in start position, in case safety neutral is faulty.

Check the starter selenoid, check for corrosion on batt, terminals and inside the cables, tap the starter with a metalic object and try to start the car, if it starts change the starter.

Today 11-12-08 my 2003 H2 Hummer would not start. Checked battery it ischarged. Cables tight. Tried to start with portable booster pak. No go. Tridto jump start with my wife's Suburban. Still no go.
When I turn the switch I hear a single click and that is it. No engine turning over. While trying to start with key the headlights go out. Out of ideas, Will take to Chevy garage in am. Will post solution.

resistor.............tell the mehanic