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Originally posted by Rowdie

Well the state ref is wrong. I've tried wiring the 97' PCM according to the 96' PCM. No luck. The pin is wired to ground. So I guess I'm left with 2 choice's. Get the instrument cluster or see if the 96' PCM is compatible with all the 97' wiring and check to see if the pin is active for the MIL light.

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Scott,
On the 2002, I understand that the entire instrument panel is a digital pulsed set up, so the entire cluster is run with only "ONE" wire. Evidently, the driver for it, is on the back of the panel. Looking at my 2002 Chrys. man. it's an LED, driven by a driver and won't tell you what makes up the driver. Soooo, in researching it, I found I needed a 270 or so, OHM resistor to bring the voltage from 12v to about 3.5v for the LED and a 2N2222 transistor for the light switch.
Run a wire from a 'RUN-START' source to the short lead of the LED, a wire from the long lead of the LED to the resistor, then to the collector lead of the transistor.
A wire from the emitter on the transistor to ground, and the center of the transistor (base) to the PCM MIL wire. Mine's, violet/yellow, might help, mine LED won't go out because of an evap. sol. sig and a fuel tank send unit sig. Hope this helps, Terry

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Originally posted by ScottDeLano

quote:

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Scott,
On the 2002, I understand that the entire instrument panel is a digital pulsed set up, so the entire cluster is run with only "ONE" wire. Evidently, the driver for it, is on the back of the panel. Looking at my 2002 Chrys. man. it's an LED, driven by a driver and won't tell you what makes up the driver. Soooo, in researching it, I found I needed a 270 or so, OHM resistor to bring the voltage from 12v to about 3.5v for the LED and a 2N2222 transistor for the light switch.
Run a wire from a 'RUN-START' source to the short lead of the LED, a wire from the long lead of the LED to the resistor, then to the collector lead of the transistor.
A wire from the emitter on the transistor to ground, and the center of the transistor (base) to the PCM MIL wire. Mine's, violet/yellow, might help, mine LED won't go out because of an evap. sol. sig and a fuel tank send unit sig. Hope this helps, Terry

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This is an email from SCOUT on Pirate regarding the MIL lite. FYI.

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Originally posted by ScottDeLano

I think he is refering to the "PCI Bus" also found in the Data link connector. On mine it is found in the #2 cavity of the DLK. I can't get to the 98 FSM right now.

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Diagnostic Connector (under dash)  
Pin Color/Stripe     Gauge Code Purpose       Location 
 3   Violet/Brown     18    D1   CCD Bus (+)   PCM-Grey 
 4   Black            18    Z1   Ground        Ground 
 5   Black/Lt. Blue   18    Z12  Ground        C107-9 
 6   Lt. Green/Black  18    D20  SCI Receive   PCM-Grey 
 7   Pink             18    D21  SCI Transmit  PCM-Grey 
11   White/Black      18    D2   CCD Bus (-)   PCM-Grey 
16   Tan/Black        18    F34  Fused B+      PDC 

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Originally posted by Scout

Rowdie,
I'm more familuar with the OBDII, yours is an OBDI I think. XJ's might have the MIL driver in the ECU or even PCM, It might even use a regular light, but i'm not familiar with the XJ and year. You need a factory service manual (FSM), Sorry, Terry

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