Wiring diagram 89 yj no power to dash when key is on. turn key will not start

Is the purple wire at the starter solenoid showing power when the key is turned to the start position? Check that first. Also do you have an aftermarket starter interrupt system, look under the dash for a little black plastic case with wires coming out hanging down or taped up there.

Sounds like a problem with the key switch since the lights are not on a circuit controlled by the key.
You may want to check the main power feed into the key switch from the starter post. There should be two or three fuseable link wires coming off the starter post going to the key switch and the fuse box.

I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.
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When you turn the key to on, do the dash and warning lights come on? This would verify power to the ignition switch.

It's like this: you have a positive battery cable with a lot of juice connected to the starter, but not to the starter motor. It is only connected to the starter motor when the start wire out of the ignition switch energizes the starter solenoid, mounted on top of the starter.

So you check the small wire to the starter for power with the key held in start. If it has power then, the starter or the solenoid is probably bad- as long as the battery is charged and the battery connections and starter connection is good.
If you have no power on the small wire in start, trace the start wire back to the ignition switch. You may need a wiring diagram- there is often a start relay, a park/neutral safety switch with automatics or a clutch safety switch with a manual transm., and sometimes a "crank" fuse. All or some may be in the path of the start wire from ignition switch to the starter solenoid. You would need a voltmeter or test light to check this circuit. If you want more help, post back with make, model, year, and engine, and I could look at a wiring diagram for your start circuit, or I could post a link for you to see the diagram.

You mean by gadgets, warning lights and gauges? That would be from the ignition switch's run wire, the wire from the on position. This wire sends voltage to the ignition system, and to the dash for the warning lights and gauges-but not directly to the dash-the signal would reach the dash after being routed through the fuse panel to a fuse for the dash gauges and warning lamps. You need to check if that fuse is good.
Recall seeing any wiring diagram? The fuses are labeled either "hot at all times" or "hot in run or start". The fuses labeled hot in run or start are only sent power when the key is on, so power for those fuses are routed through, or turned on by the key being on. Depending on the car and its wiring set up, many will have relays that are turned on by the run wire, and power is then sent from the relay to that circuit's fuse in the fuse panel. This relay may be called the ignition relay. Or your car may have a different relay to send power from the run wire to the fuse panel.
The only way to figure yours out is to see a wiring diagram for it. Then you will see how power is sent from the ignition switch to the dash.
Wiring diagrams are almost always found in repair manuals. Check if your library has a manual for your car. Most libraries have quite a few repair manuals. Or parts stores sell repair manuals too, for about $25. Try to find a Haynes repair manual for your car. The other popular repair manual is from Chilton. My preference is Haynes, just my preference. I been burned by Chilton manuals sooo many times-incomplete wiring diagrams, incorrect information, incomplete information. Haynes are not perfect by any means, you want perfection-spend big bucks for a factory service manual ! In general, Haynes is more complete than Chilton.
OK, enough venting. If you have a test light, check for power at the fuse for the dash (may be labeled "gauges" or "instr pnl", something like that) with the key on. If it has power with key on, wire from the fuse goes to the dash. If that fuse has no power to it with key on, power has been lost between the ignition switch and that fuse-now you definitely need a wiring diagram to find the problem.

Fixed Problem (it was my van) no power to ignition wire at starter. Replaced Ignition lock cylinder. just worn down. (Delivery van 50-60 starts a day). 160k miles.

I would think your starter is over heating (grounding) which is draining power from batt which is making alternator use its charging capabilities to the max . starter motor is what id check. this isnt a little 14 gage wire robbing all that power so quick, it is a direct connection within the batt,starting or charging system.

make sure ground wire is properly routed and the starter cable from battery to starter is in good shape and not all corroaded if the battery is good then the problem is in the cables or starter

sounds like you are working on a car FSM free?
why do that?
95 YJ
early wrangler
i have 95 yj fsm and 93, the 93-95 are a year class range.
very simular.
here is a free 93 fsm with full schematics in chapter 8w
wiring chapter, clik
pdf 76 is page YJ 19 actual
and as you can see its cave man simple 2 wires.
minus to ECU ignitor driver. transistor (inside ecu)
and
+ goes to
a142 sheet 5 (pdf 62)

im not sure what part A<B<C is, a fuseable link, is my guess
and is blown. but that be a bingo spot for sure.
the full manual is there.
see spark chapter.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

posted over 100 times, this link, its not new.