Mishkin_707

Ok so I've searched and didn't find much, only a YouTube video but that's to wire one in.

Anyways, I have an 1989 5SPD 240SX with the stock KA24E and HUD, I was replacing the light bulbs in the gauge cluster with LEDs when I noticed there were two bulbs missing, on my cluster there are two spots that don't have a symbol for anything I know one of them is supposed to be for a check engine light but mine doesn't have the check engine light symbol, so I was replacing the bulbs and when I turned the key to see how bright everything was with the LEDs I noticed I put the bulb from oil light into the wrong slot and noticed the blank spot now had a yellow glow, I started the car and the yellow light turned off as if it was the check engine light coming on like the rest of the lights on the cluster right before you start the car.

now I have read that 1989 and 1990 240sx that weren't produced for Cali had no check engine light and thats why they didn't have the symbol on the gauge cluster, I am the second owner of the car and the person who had it before I bought it was from Texas and bought it new in 1989 (i have every record and paperwork from the original owner proving this) he moved to Cali and traded it in in 2001 about a week before I bought it, so I know it wasn't tampered with

My main question is, now that the light turns on when starting the car along with all the other lights, is it in fact the check engine light? What can I disconnect to make a check engine light up? And if it indeed does light up, can I reset it with the ECU like is I was checking for ECU codes?

Here are the pics of what I'm talking about

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