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Old 07-11-2011, 04:11 PM   #1
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'88 GT check engine light?

My check engine light doesnt show anywhere when I turn to acc...? There is a light that reads "check engine" right? To pass smog it's suppose to go on and then go off when the car starts. If it's burnt out where is it suppose to be?
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Old 07-11-2011, 09:09 PM   #2
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Should be directly under where it says unleaded on your instrument cluster. At least that's where it is on my 92. If it's not there then take a flash light and point it at the instrument cluster you'll be able to read the embossed lettering of "check engine". To change the bulb you'll need to remove instrument cluster to change it.
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Old 07-12-2011, 08:04 PM   #3
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Any idea how to get the cable off the back of the speedo?
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Old 07-12-2011, 08:08 PM   #4
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Re: '88 GT check engine light?

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Any idea how to get the cable off the back of the speedo?
I believe it is clipped on and you have to squeeze in the right place to raise the clip and get it off.
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Old 07-12-2011, 08:10 PM   #5
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I can see a plastic piece connected to the metal pin on the back of the gauges but there's no clips. It turns slightly but doesn't come off and I don't want to muscle it out unless I'm sure thats what to do
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Old 07-12-2011, 08:59 PM   #6
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Re: '88 GT check engine light?

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I can see a plastic piece connected to the metal pin on the back of the gauges but there's no clips. It turns slightly but doesn't come off and I don't want to muscle it out unless I'm sure thats what to do
See the plastic clip on the end?
You have to squeeze it between the bend and the circling piece to raise the end of the clip up out of a groove.
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Old 07-12-2011, 09:19 PM   #7
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To replace that bulb you really should not have to remove the speedo cable. The cluster should come out enough to give the bulb holder a quarter turn and it should pull out. But all things in the mustang world can be different.
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Old 07-13-2011, 12:56 AM   #8
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Thanks, I had barely any slack in the speedo cable (gauge cluster only moved an inch off the dash) so I had to take it off to even fit my hand behind there. I was barely able to reach around from underneath to disconnect it. Thanks for the responses
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