I haven't been on in some time...Maybe I can help.
Kreg is correct--you need to confirm the bypass is programmed properly.
Next:
1.) Just to touch on the wiring, how did you hook up the parking lights? Per Kreg's earlier post, the parking lights need to be hooked up through a 2K (or 2000 OHM) resistor; I believe Kreg had listed 2000K--a typo. Refer to this diagram for parking light hookup: http://www.bulldogsecurity.com/diagrams/extrainfo/diagrams/14301_CARAVAN_CHRYSLER%20PARKING%20LIGHT%20DIAGRAM.pdf The hookup also requires a relay for isolation. If the parking lights are not wired properly, or with a resistor that is too large (i.e., 2000K or 2M OHMS), you won't get parking lights, but will just hear the APS901's parking light relay flash.
2.) What is happening when you press the APS901C's remote? If you hold the remote button down, the parking lights just flash--this is a car finder mode. If you press the remote 2x in sucession for remote start, does the unit just click? How do yout have "input check" set? it is default to Tach.
Generally, when a remote start attempt is made with APS901C without first learning tach, the parking lights flash 7x, indicating that the unit has not "learned" the tach signal. I would make sure the parking lights are wired correctly, and then try setting the input check to "voltage" and retry.
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As far as setting the input check, put the key in the ignition and turn it to the "on" position. Press the programming button on the antenna 3x (the parking lights should flash once, and the LED on the antenna should flash). Turn the ignition off, then back to "on" (this puts you into programming bank 2). Then turn the ignition to off and then to "on" once again--you are now in programming bank 3. Now press the programming switch on the antenna five times. The parking lights will flash each time you press, reflecting the feature setting that is configured, and the LED will reflect the feature. For example, when you are in bank 2, press the programming button 1x. The parking lights will flash twice (reflecting 10minute run time default setting), and the LED will flash 1x slowly, indicating the first feature.
When you press the button the 5th time, parking lights will flash 2x, indicating the tach setting (default), and the LED will blink 5x, off, 5x, etc., indicating the 5th feature is selected.
Now press the remote button once to select DBI tach, and a second time to select voltage. Each selection causes the parking lights to flash (3x for DBI Tach, 1x for Voltage).
You can exit programming mode by turning the key off.
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Once your bypass is properly programmed, the Parking lights are correctly wired, and the APS901 is configured for Voltage, try the remote start again.
Lectric Guy