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Q: Backup warning system no longer works on 2007 Chrysler Aspen

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
(2007 Chrysler Aspen backup warning system )
working When I was backing up their was a glass window beind the car the warning system started to beep, maybe 4 to 6 times then stopped. Since then it has not worked since? can you tell me how to rest it or make it start working again.
Ed 4-10-2011
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Most back up warning system issues I have experienced were caused by (unknown or known) impact of the rear bumper, causing sensor damage. A diagnostic test should help narrow down the issue to a specific system or component.
My wife said no impact of the window when this happened. Does the warning system work like a sonar on a ship? Ed 4-11-2011
Doesn't mean she or you hit the window. Could be a problem pre-existing. Remember that people park really rudely sometimes - and could bump into your bumper, causing sensor damage.

my backup senter quit working a while ago the senter was hanging from snow and ice I put it back in bumper hasent work since now snow and ice broke it off wire
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