Cruise Control F150 1997

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Old Aug 22, 2006 | 07:54 AM
  #1  
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From: Belgium, little town called Mielen-boven-Aalst
Cruise Control F150 1997

Hi you all !

Some days ago my cruise-control, who has been working fine untill now, quit working.
I have been reading on this forum that Ford has a problem with the cruise and is recalling trucks?

I live in Belgium, would Ford repair my truck to?

What is the problem why Ford is recalling his trucks?

Anyone an idea what I can check to get my cruise repaired. I subscribed to the Chilton Online, but there are noschematics what so ever so I do not now where to start to detect the problem.

thanks,

Bart
BEL-150
 
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Old Aug 22, 2006 | 10:06 AM
  #2  
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Bart,

There is a specific Safety and Recall section in which this issue was discussed at very great length.

Ford's recall likely does not include vehicles in Europe, however, check with whatever local Ford resources you may have.

FWIW, the system can be rendered safer by installing an inline fuse in the wire harness to the SCDS on the master cylinder. You can pick one up (here in the states) for a couple of dollars from any autoparts store. Just need to waterproof it.

Additional information on the recall is available at www.nhtsa.gov Look for recall 05S28 for the most recent round of recalls. There is also a copy of the engineering evaluation that makes interesting reading for anyone interested in the details of the failure.

As for your cruise, disconnect the connector at the SCDS and check the switch's contacts for continuity. If open, replace the switch as it passes power to the cruise module. For diagnostic purposes only, a jumper can be installed between the two harness connector pins to see if that allows cruise operation. The SCDS is a redundent (backup) safety disconnect for the electronic cruise module.

Steve
 
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Old Aug 22, 2006 | 03:28 PM
  #3  
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Originally Posted by projectSHO89
Bart,

There is a specific Safety and Recall section in which this issue was discussed at very great length.

Ford's recall likely does not include vehicles in Europe, however, check with whatever local Ford resources you may have.

FWIW, the system can be rendered safer by installing an inline fuse in the wire harness to the SCDS on the master cylinder. You can pick one up (here in the states) for a couple of dollars from any autoparts store. Just need to waterproof it.

Additional information on the recall is available at www.nhtsa.gov Look for recall 05S28 for the most recent round of recalls. There is also a copy of the engineering evaluation that makes interesting reading for anyone interested in the details of the failure.

As for your cruise, disconnect the connector at the SCDS and check the switch's contacts for continuity. If open, replace the switch as it passes power to the cruise module. For diagnostic purposes only, a jumper can be installed between the two harness connector pins to see if that allows cruise operation. The SCDS is a redundent (backup) safety disconnect for the electronic cruise module.

Steve
FYI, the fuse does not negate the need for replacement of the switch. The problem is that the switch membrane fails, causing the leak that causes the short that causes the fire. Installing the fuse protects it from the fire (generally) but does not prevent the root cause (the leak) from occuring.

Your Ford dealer should be able to order the switch for you. The part number the dealer orders is 1L1Z-9F924-AA Motorcraft Part # SW-6350

E-mail Torrie at www.fastpartsnetwork.com and he may be able to ship one overseas if necessary.

Good luck!
 
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Old Aug 22, 2006 | 11:37 PM
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FYI, the fuse does not negate the need for replacement of the switch. The problem is that the switch membrane fails, causing the leak that causes the short that causes the fire.
Gee, want to explain why Ford is only installing the fused harness instead of the switch also? Hmmmm, kind of like deja vue all over again...

FWIW, after having reading the failure engineering analysis, the conclusion is is that the switches were not defective in the first place since the exact same switch is used in multiple products lines with extremely low rates of failure for the switches. I'll leave it to someone else to actually read the report and to post why the switches fail.

Steve
 
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Old Aug 23, 2006 | 08:33 AM
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From: Along Lake Erie
Originally Posted by projectSHO89
Gee, want to explain why Ford is only installing the fused harness instead of the switch also? Hmmmm, kind of like deja vue all over again...

FWIW, after having reading the failure engineering analysis, the conclusion is is that the switches were not defective in the first place since the exact same switch is used in multiple products lines with extremely low rates of failure for the switches. I'll leave it to someone else to actually read the report and to post why the switches fail.

Steve
Well, I've got the NHTSA ODI report on my desk, two of the engineers that worked on the engineering analysis work within 20 feet of me, one of the engineers involved in the analysis is my boss, and I eat breakfast and lunch every day with the two machinists that built the test fixture that generates the vacuum pulses for the switch analysis. I have read the report from ODI, and it's pretty clear that the switches are failing, causing the entire problem. In my opinion, the switch's interaction with the brake system is the root cause. Replace the switch, and there's no possibility of a leak occuring in the first place.

Dealerships have been instructed to change the switch if and only if there is evidence of a LEAK present. While the fused harness alone eliminates the fire risk, in my opinion, and in the opinion of others on this and other Ford Truck Enthusiasts' sites, most people agree that the harness alone does not address the root cause of the problem, which is the switch that can potentially fail and leak. You can have a fused harness installed, and still have a leaky switch at some point in the future, so it's my recommendation to replace the switch regardless of whether or not it's currently leaking.

Ford's official policy may disagree with me, as may others on this board. However, I stand by my recommendation to replace the switch regardless of Ford's 'official' policy. It just makes sense, doesn't it?

-Joe
 
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