Lots of power, dash lights up but no ignition power to starter, relay changed, neutral start switch changed, fuses good.

This suggests the starter motor might be starting to fail. It's normal for the dash lights to go off for a moment as you turn the key as the starter uses a lot of voltage to spin the motor. Have you checked the fuse and the relay are OK? The solenoid and starter motor are a one piece unit so how did you change the solenoid? Have you tried replacing the entire starter motor? The issue could be between the solenoid and the motor itself.

Probably should check to see if there is power going down threw the small wire on the starter solenoid when the key is turned to the start position, that be a good place to start. Double check the battery cables, make sure they are in good shape, clean and tight. If there is no power to the small wire on the starter solenoid, it may be the starter relay, or even an ignition switch.

This could be a couple different things causing your No-start condition. first thing I would check (Battery is good) access the starter solenoid, the small single wire connection is the start signal. Test for 12 volts here with DVOM or test light while someone turns the key. If there is 12 volts reading, the starter solenoid is defective. If there isn't 12 volts reading check all the fuses (with test light).
The second item causing the trouble could be the Neutral Safety Switch (Auto Trans) or Clutch Safety Switch (Manuel Trans) These could be open or out of adjustment.
Hope this helps you...

If by lights, you mean the dash lights come on, then ignition switch must be getting power. If dash is not working with key on, check the 30 amp fuse link which powers the ignition switch.
If switch is good and starter is good, the start wire from switch goes to, if automatic, to inhibitor relay (the park/neutral function) and then to starter. There is also an inhibitor switch on the shifter or on the transaxle that turns on the inhibitor relay when key is on and shifter in park or neutral. The inhibitor switch is powered by a 10 amp fuse D.
If you have a manual transmission, the start wire from ignition switch goes to the clutch interlock relay and then to the starter. This relay is turned on by the clutch interlock switch on the clutch pedal.
You can check for power on either relay, the inhibitor relay or the clutch interlock relay, with a test light. Pull the relay out, have the key held in start position. Now both relays would have power showing on two terminals where the relay plugs in. If inhibitor relay only has power on one terminal or no power at all, either ignition switch is not sending power or fuse D is out or the inhibitor switch is not working right. If clutch interlock switch does not have power on two terminals either the ignition switch is not sending power or the clutch interlock switch is bad.
If the relay checks are good, check for power on the small wire to starter with key held in start. If you have power there, the starter solenoid must be out.

engine will not turn over.first check battery volts, should be 12.6 volts. if not battery is weak or dead make sure battery cables tight and clean them if you see a lot of corrossion use baking soda and water neutralize corrossion remove battery cables clean them with wire brush also clean battery post terminal with wire brush also wear safety glasses protect your eyes now.try charging and jump start vechicle see if battery good or starter at fault bench test starter and starter solenoid if starter dont work problem in the starter.if starter good.you have blown starter fuse bad starter relay if dash lights dont light up when you turn on the ignition switch and battery has 12.6 volts.check ignition fuse if fuse is good dash still dont light up,you could have faulty ignition switch.if all is good you could have bad clutch safety switch for manual transmission or faulty neutral switch for automatic transmission.if you have the late model cars from 1996 to 2012 has the theft security system which will cause car not to start and try turning engine over with a large wrench to make sure engine not locked up.

There is a switch that only allows the starter to work if the gearshift is in neutral or park.
Try wiggling the gearshift while you try to start the engine. If that causes the starter to engage briefly, you'll need to either re-align the switch or replace it.

#1 Try starting the car in Neutral, if no start replace the Park and Neutral safty switch. #2 Check for a faulty starter solenoid. #3 Check for a faulty stsrter motor. #4 Check for a faulty ignition switch. #5 Check for faulty starter Relays.#6 Check the Transmission Range sensor it could be out of adjustment or defective. #7 On 1998 and later models, the power relay is in the power distribution box in the engine compartment. Refer to your owners manual for more information on relay location. Good Luck From Ernie @ RedDeer, Alberta, Canada.

check starter,starter fuse,relay.










TIM...........

CHECK BATTERY CABLES FOR CLEANESS FROM CORROSSION AND TIGHT CONNECTION. IF NO POWER GOING TO STARTER COULD BE FAULTY STARTER RELAYOR FUSE ALSO BAD OPEN SOLENOID.IF ALL IS GOOD FAULTY PARK AND NEUTRAL SWITCH WILL CAUSE NO START PROBLEMS.IF DASH LIGHTS DONT COME ON WHEN YOU TURN IGNITION SWITCH ON CHECK IGNITION FUSE IF OKAY.FAULTY IGNITION SWITCH WILL CAUSE NO POWER TO STARTER.

Your system is very complex and requires troubleshooting by an expert. I would trace the start signal from the switch then out of the bcm to the starter relay. See diagram below. I would also trace power from the park/neutral fuse thru the park/neutral switch.