I have rascal eco 04 need to no how to turn it on

Make sure its not in freewheel. One way you can tell is the service lamp is flashing five times then the there will be a pause then will flash again five times. This is a code 5 failure which means either the parking brake is engaged or the scooter is in freewheel and not engaged, When you tern the key does anything turn on. I have a Rascal 600t and i've gotton to know every inch of it.If you have no power first check the key switch that its functional.

What you got to do is what we call "chase the voltage" First you will need a 24v circuit tester
http://www.amazon.com/OEM-25886-6-24V-Circuit-Tester/dp/B0014WIVX6

You may also need a VOM meter only $9
http://www.amazon.com/Mastech-YG188-Pocket-size-analog-multimeter/dp/B00064CH6A/ref=sr_1_8?s=hi&ie=UTF8&qid=1339024102&sr=1-8

The problem is 24volts is either not getting to the tiller head or you have a broken wire in the tiller head. Start at the headlight make sure its switched on. Use the circuit tester, put the clamp to ground, use the probe to find the 24volts, The hot side is the side wired in series with the switch. The tester will light up when it has voltage. Chase the wire back through the system. When you get to a cable or anywhere you can't see the wires use the VOM meter, disconnect the scooters batteries leaving the power switch on. Set the meter to read resistance scale high scale, short the probes together, zero the meter. Put one probe at the headlight the other probe at the connector you think the wire ends up at. Normally every wire is a different combination of colors like red; with a white stripe. Most of the time a wire ends up at a connector and the color code doesn't change. So if you are not getting continuity on any of the pins on the connector you know its got to go, you've isolated the open circuit too the tiler head. Here's a test you can run! Turn headlight on, power on for scooter, disconnect scooter battery, place one probe at head light. Disconnect tiller cable. Probe each pin, one of them hast to cause the meter to deflect to zero. If if doesn't the problem is in the tiller head. When working with little wires i like to use crochet needles. You can use the meter to check cables each pin in must have a pin out. If you don't get continuity between pins the cable is bad toss it.