Backup alarm question
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Senior User
Joined: Feb 2007
Posts: 278
Likes: 1
From: Latrobe PA
Backup alarm question
After disconnecting both batteries to install a new starter(or coincidence) my backup alarm started to make a higher pitch sound. Also the light on the shutoff switch stays on and now the alarm doesn't work. Where do I start troubleshooting. By the way it has been raining almost everyday here in S.W. PA. Sometimes after washing it would not function.
Fleet Mechanic
Joined: Sep 2002
Posts: 1,388
Likes: 2
From: Greensboro, NC
If you have access to a scan tool (not just a code reader) then it can pull codes from the controller and point you in the right direction. I'm currently evaluating a new scan tool for my shop - the Snap On Solus Pro couldn't find a similar problem with mine but the OTC Genisys Evo says one of my reverse sensors is faulty. Haven't had a chance to go any further but it will be on the agenda for this week. Not sure if mine is just a strange situation - but mine actually works when the temp is below 40* or so but once it warms up it acts similar to the way you are describing your issue.
Cargo Master
Joined: Dec 2007
Posts: 2,822
Likes: 0
From: Minnesota
I read somewhere that if the light on the switch is always on, it is the speaker, and if it is only on when put in reverse, its a sensor. Using this info, I replaced my rear speaker and it worked TEMPORARILY, then back to not working and light always on. Based on this, I would only trust the proper scan tool, like tdappleman stated.
Junior User
Joined: Mar 2011
Posts: 82
Likes: 0
One sensor is on its way out. The Parking aid module tests the sensors as soon as you put it on reverse. It theres an open inside of the sensor itself.. then it will turn off the System to prevent a false reading and ultimatelely an accident. I have 2 that are broken since i bought it but havent got around to changing those expensive buggers..
Last edited by Jamerian; May 3, 2011 at 09:26 AM. Reason: added more
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Junior User
Joined: May 2011
Posts: 52
Likes: 0
From: New Lenox, IL
Where do you buy them at? Ford quotes ~$129, Tousley has them for ~$80, but I found a thread from 2005 that says they were ~$53! Did they really go up in price that much since then? Part # is YL1Z-15K859-AA and/or 1L1Z-15K859-AA I have two bad ones, not about to pay ~$160 just to get the back up sensors working.
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Elder User
Joined: Nov 2006
Posts: 566
Likes: 1
From: Virginia
When (if) mine fail I don't see me replacing them. I hate the damn beeping noise, and my trailer hitch sticks out far enough that I'll hit what's behind me before it beeps badly. And I get tired of hitting the button every time I tow and have to back up. Strenuous, I know, but I still don't reap the benefits of the sensors more than I **** and moan about them.
Junior User
Joined: May 2011
Posts: 52
Likes: 0
From: New Lenox, IL
haha. See, I've never had sensors and I don't even feel I need them (they may be nice, though I can't even say for sure!), but because of my (self diagnosed case) of obsessive compulsive disorder, I feel I HAVE to fix them...because they're broke. I don't care if I don't use the, it just bothers me that they're broke haha. Damn OCD. Maybe I'll just unplug the switch so the light never comes on...that'd be a "band-aid" of a solution, but it may suffice my OCD haha.
Junior User
Joined: Mar 2011
Posts: 82
Likes: 0
When (if) mine fail I don't see me replacing them. I hate the damn beeping noise, and my trailer hitch sticks out far enough that I'll hit what's behind me before it beeps badly. And I get tired of hitting the button every time I tow and have to back up. Strenuous, I know, but I still don't reap the benefits of the sensors more than I **** and moan about them.
I guess having a rear view camera would be the best.. that way u know exactly whats going on back there. Ive only had mine for 2 months and i wish i had either.. its not easy parking on my street with this thing. Ive been driving a Ford Escort for 2 years.
Fleet Mechanic
Joined: Jun 2006
Posts: 1,589
Likes: 20
Suggest you get a water hose and wet each individual sensor until you find the one that is bad. Plan on spending about $75 per sensor.
DSMMH
DSMMH
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
haha. See, I've never had sensors and I don't even feel I need them (they may be nice, though I can't even say for sure!), but because of my (self diagnosed case) of obsessive compulsive disorder, I feel I HAVE to fix them...because they're broke. I don't care if I don't use the, it just bothers me that they're broke haha. Damn OCD. Maybe I'll just unplug the switch so the light never comes on...that'd be a "band-aid" of a solution, but it may suffice my OCD haha.
Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
haha. See, I've never had sensors and I don't even feel I need them (they may be nice, though I can't even say for sure!), but because of my (self diagnosed case) of obsessive compulsive disorder, I feel I HAVE to fix them...because they're broke. I don't care if I don't use the, it just bothers me that they're broke haha. Damn OCD. Maybe I'll just unplug the switch so the light never comes on...that'd be a "band-aid" of a solution, but it may suffice my OCD haha.
That's not OCD!
Do you check your tire pressure every week - including the spare?
Do you do a walk-around periodically looking for burned out bulbs:
license plate, side markers, high mounted brake light, backup bulbs?
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