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Originally Posted by citizen@large
1. I've read around here that the 89 "does not store codes". - Is this true?
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Yes, it's true.
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Originally Posted by citizen@large
2. a. If it doesn't, is a dealer the only place to get them read while driving the thing with the DRB II reader hooked up? Or, do parts stores sell them?
b. If it does store codes, how does one go about getting them?
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You can find them on eBay but are still pretty expensive.
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Originally Posted by citizen@large
3. Where is the connection to get the codes on this rig?
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There are 2 small connectors in the engine compartment, pass side near the coolant bottle. If you still have the cover over the relay center, they are right there.
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Originally Posted by citizen@large
4. I don't seem to have a 'check engine' light- I tried the ON-OFF-ON-OFF-ON trick, didn't notice any check eng. light, so i pulled the guages, checked the bulbs in back, power to them, no probs... Am I not supposed to have this light? or am I really missing something here?
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This doesn't work for your year. Remember, no codes.
However, the sensors can all be tested using a multimeter. If you google for Jeep FSM, you'll find links to the 1988 FSM. This will contain the pinouts and values for the sensors.
Here's a good place to start.
http://www.lunghd.com/Tech_Articles/...iagnostics.htm