Did you test terminal #4 for continuity to body grpound?
Vehicle is equipped with self diagnostics. Check if it is possible to retrieve trouble codes with it.
RETRIEVING DIAGNOSTIC TROUBLE CODES
When using Chrysler's Diagnostic Readout Box (DRB-III) scan tool, the scan tool will be used to identify or display all DTCs for system diagnosis. When using generic scan tool, it will be necessary to use Malfunction Indicator Light (MIL) on instrument panel and generic scan tool to retrieve DTCs. Not all DTCs can be retrieved using generic scan tool and MIL. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are 4 different possible failures for the downstream oxygen sensor system, but the MIL can only identify a downstream oxygen sensor failure by flashing a DTC 21, but the scan tool will be able to distinguish between the different failures.
When using generic scan tool, scan tool is not able to identify all possible DTCs. As an example, generic scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit or A/C pressure sensor, but these DTCs will be displayed by
Using Malfunction Indicator Light (MIL)
1. Ensure battery is fully charged. Turn ignition on and note operation of MIL. The MIL is located on instrument panel. When ignition is first turned on, MIL should come on to verify bulb and circuit operation, and then go off.
If MIL does not come on and then go off, bulb circuit may be defective, or problem area may exist on CCD Bus between Powertrain Control Module (PCM) and instrument cluster. If problem exists with CCD Bus, this problem may be displayed when using scan tool to retrieve DTCs.
2. Turn ignition on, off, on, off and on within 5 seconds. Record 2-digit Diagnostic Trouble Codes (DTCs) as displayed by flashing MIL.
3. For example, DTC 24 will be displayed by 2 flashes, short pause, and then 4 flashes. A short pause will exist between first and second digits on DTC. If more than one DTC is stored, after first DTC is displayed, there will be a longer pause and then another stored DTC will be displayed.
4. Once all DTCs are recorded, proceed to retrieving DTCs using scan tool to ensure all DTCs are obtained.
Friday, July 2nd, 2010 AT 12:04 PM