Ok i have a 2008 astra iv been threw the ringer on this thin no crank when key is turned and fuel rpm and speedo dont self test at start up but if u get under and jump starter motor cranks but no fire any ideas also all the starting relays are clicking and obd2 scanner cant connect to ecu i was thinking an ecu problem??
Either you have a very bad battery, or your not guetting fuel for it to start.
SOURCE: 1996 Saturn SL2 - No response from starter - over
It would be hard to guess but a simple diagnostic would be to use a 12v test light and see if the starter solenoid recieves a 12 v signal while turning the key. If it lights, the starter should turn over. This also gives you the oportunity to check and verify all electrical connections at the starter including the large orange fusible link wire at the large battery terminal.
SOURCE: Saturn SC2 Hot Start Problem
My 1997 SC1 would start fully charged after about 5 minutes of cooling off (same as my Busa). If the vehicle draws lots of bettery energy when the ignition switch is turned (the headlights dim as if the battery was week) and all you her is a "tlock" then more than likely the starter solenoid is sticking when the engine gets hot. Age, as well as wear and tear in the vehicle, would cause for the stater, and the starter solenoid, to weaken. When the engine is cool it will start as if the starter was new, but after driving the car for about 10 minutes the problem starts. The engine running hotter than normal (ie.cooling system problems, diferent muffler system, low oil level), no necesary due to overheating, will add to the problem. My solution was a new stater ($115) and a starter heat wrap ($20), and I never had that problem again :-)
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