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Hello, let me review your request. Please stand by.
How long does the pump stay on when you start it?
Did all four sides go down at the same time or one went out before the other one's ?
How old is your battery?
The symptom you are experiencing can be caused by a weak battery, a leak in the compressor hose or a weak compressor. Since the battery is good next step is to make sure the suspension air lines are not leaking, since all four sides are doen i will recommend to check for leaks near the air compressor. If everything else is good then the problem is a weak air compressor.
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