Engine won't turn over. Where should I start?

P

pax

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Over the weekend my 94 Mark VIII started having problems with a fast idle. After reading through the posts I purchased a code reader. The car was throwing the following codes: 121, 124. I figured I would have to replace the TPS switch and while the throttle body was off I would also replace the Idle Air Control Valve.
I went out this morning to get started and the car would not turn over at all. First I tried to jumpstart with no luck. Then I replaced the battery with a known good battery. Same results. The windows, radio, and everything else is working.
Is there a way to bypass the ignition switch? I have been looking through the posts but haven't found anything similar to my problems.
Thanks for reading, any help will be appreciated!
 
Have you got another (PATS) key? If it doesn't even engage the starter with a know good battery, not many things to check. Maybe a blown fusible link between battery and starter or blown fuse in the engine compartment driver's side. If not a battery/electrical problem, you're back to a PATS problem. Check this:

http://arrc.epnet.com/autoasp/framerq.asp

You may have to use the user name and password. They are both the same - "library"
 
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Thanks for reading my post. Unfortunatley I only have 1 factory key for the car. I recently changed the MLPS and I'm gonna make sure the connector is seated. It's almost like the neutral safety switch is preventing the car from starting.
 
Starting problem solved, I didn't have a good connection to the MLP switch.
I removed the hood and plastic cowling to get better access to the TPS and the Idle control valve, parts are off and awaiting the new ones. Thanks for the help.
 
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