Out of the kindness of my heart I have just driven to my "Stealth" garage (invisible to 'er indoors) and measured across the low current side of the solenoid and got 8.2 ohms. so I would suggest checking that first and then these in order of importance..
1) Check that you have not connected both sides of the battery to the solenoid. If you have it would explain the single operation, and warning lamp going off. Only the negative should be connected, and the cable on other side of the solenoid goes to the stud on the starter motor.
2) Check that high current cable is not touching the starter body (i.e. crimped on connector upside down and touching something it shouldn't) or any other part of the frame.
3) Disconnect battery, remove both heavy cables, reconnect everything else then connect a meter set on say 200 ohms to each solenoid stud, and press the starter button. you should see the meter drop to near zero ohms. If not the solenoid is faulty. if it drops to zero without the button being operated I suspect you have fried the solenoid and the heavy contacts are fused together (from an error as mentioned in step 1).
4) If all above are ok, reconnect the heavy leads then carefully take a jump lead, clip it onto one side of the solenoid and firmly push it onto the other side. The starter should spin with vigor (if your battery is good). If not the starter motor is suspect, and I would contact your supplier or Alton direct.
I hope this helps,
cliffa.
