My 91 olds ninety eight had an issue, radio would not work and heater fan stuck on. Thought it might be fuse or relay **** checked them. After messing with them tried to start the car, dash lights and all comes on but car won't crank, no clicking nothing. Dash reads ecm data link problem? Any suggestions?

SOURCE: 1996 olds cutlass supreme won't crank

You can jump across the celonoid on the starter. If the engine turns over then your problem is either the celonoid or the starter switch.

SOURCE: 1006 olds cutlass supreme won't crank

try taking a power wire from the battery positive and getting it on the starter terminal and seeing if the starter turns over if it does it could be a fusible link that runs between the starter terminal and the relay

SOURCE: car won't start!!!

mine is doing the same... all i did was reconnect the battery...and it worked fine...but know my hood wont open!!! so i cant fix the cable on the battery!!! i pull on the darn cable so hard and the hood still wont budge!!!

SOURCE: Car died the other day, and now it wont start. Everything such as dash and radio seem to be working fine.

hi there the things to check are do you have a spark at the plugs?
do you have compression ?
are the cam shafts turning?
is the cam belt intact?
this are all needed to make the engine run it will turn over great but not start with this things not working infact if the last 3 are not there it will sound diffrent when you are turning it over with the key.

hope this helps Regards JR

SOURCE: air condition blows hot and dash reads ecm data link problem

it's your instrument cluster (digital speedometer). Changed mine today with a used one at the junk yard. A $50 fix, but it's worth it. The only way I knew was to buy the service manual for the car.