Question about 1997 Cadillac DeVille
Do an on board self-diagnostic check you should have a ACM 1340 or 1341 code you must clear this code before you can add any freon
Posted on Jul 31, 2010
You have to clear the dtc code to get your a/c comp. to engage heres how you do it .
1. press and hold your a/c off button and passenger wamer button at the same time
2. all instrument gauges will light up completely and flash
3.on your message board your goin to see pcm ? press the fan button down till you get to acm
4.when your message board says acm press up on the fan button untill it says acm clear code once you clear the code your comp. will engage
Posted on May 18, 2012
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Posted on Jan 02, 2017
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