I've had a few jeeps that didn't have a check engine light on the bulb check, it was alway's the ECM was bad. The check engine light along with all your other dash lights should come on momentarily when you cycle the key it's a bulb check.
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I've had a few jeeps that didn't have a check engine light on the bulb check, it was alway's the ECM was bad. The check engine light along with all your other dash lights should come on momentarily when you cycle the key it's a bulb check.
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