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Where is the check engine light relay for 2001 jeep wrangler?

There isn't a dedicated "check engine light relay" in a 2001 Jeep Wrangler (or most modern vehicles). The check engine light (MIL - Malfunction Indicator Lamp) is illuminated by the Powertrain Control Module (PCM) itself, not a separate relay. The PCM monitors various sensors and if a problem is detected, it activates the light.

If your check engine light isn't working, the issue lies within one of these areas:

* PCM: The PCM itself might be faulty. This is the most likely scenario if other things related to the engine's electronic controls are also malfunctioning.

* Wiring: A broken or corroded wire in the circuit between the PCM and the check engine light bulb is another possibility.

* Bulb: The bulb in the instrument cluster itself might have burned out. This is the easiest thing to check first.

* Instrument Cluster: In rare cases, a problem with the instrument cluster itself could prevent the light from illuminating.

To diagnose the problem, you should have the diagnostic trouble codes (DTCs) read using an OBD-II scanner. This will tell you *why* the check engine light is on (or why it's not coming on when it should be). A faulty PCM, or wiring issue, wouldn't show up as a specific "relay" problem.

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