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  #1  
Old 06-21-2007, 01:40 PM
 
Join Date: Jun 2007
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Default Brake Shift Interlock Issue

[size=2]2001 F150 Automatic 5.4 Triton V8 110,000 miles. Started the truck went to shift from park, no go. Shut it off and restarted still no go. Found a blown fuse on the interior fuse block (#15 = Stop Lamp Swith {Speed Control, Brake Shift interlock} GEM Module, RABS Module) 5 amp. Found a 5 amp not used on my model and it died. Popped a 10 amp from location 23 (trailer tow battery charge relay ect. . .) Started the truck and got it home. Shut it off and started again and low and beold it will not shift.

without finding a decent wiring diagram anywhere for this problem was able to find out that the interlock actuator requires voltages from pedal position switch as well as brake light switch. Found the pedal swith and I am getting a voltage at depression of pedal between the two foward wires. Voltage available across the green striped wire on aft of switch. Am unable to find location of brake light switch.

Also, I figured I would replace the cannabilized fuses. When I accidently put a 15 amp fuse in # 15 it blew right away. My electric windows don't work as well as the inertior lights.

Any help anyone can give would be very appreciated

E.A Jones
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  #2  
Old 06-24-2007, 08:19 PM
 
Join Date: Jun 2007
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Default RE: Brake Shift Interlock Issue

I got some leads from Ford Truck Enthusiast. After working on it (after the rains quit) I traced my short to Fuse 15 back to the sensor connection at the foward top of the brake master cylinder was filled with oil. Tried cleaning out the oil but the moment I tried to put the connector back on it filled back in. So on Monday I go down to my local Napa and try to identify said sensor. Again Thanks for the fast and easy assistance

Ethan Jones

If You Love Your Freedoms, Thank A Vet!



This is part of the thread that was passed on to me

After checking into my "#15 (5 Amp) fuse that kept blowing" mystery a little deeper tonight in the driveway, I discovered that in my case, this problem was a caused by a two wire sensor mounted on the Brake Fluid reservior under the hood. Not quite sure what this sensor actually does, (measure brake fluid level maybe) but it is mounted right in to the brake fluid line and must have cracked or the seal gone bad. Therefore brake fluid came up into the mounted plastic piece and caused a short between the two contact pins under the connector plug. This is not visible unless you unplug the two-wire connector that goes in to this sensor and look down into the conact area. What started out as a "Can't get truck out of park." tracked back to fuse #15 - which kept blowing - somewhat intermittently - and then finally to this fluid sensor gone bad. Hope the solution to my particular problem helps someone else encountering the same thing it to quickly trouble-shoot what I thought was going to be a nasty harness / electrical problem. Now off to figure out to obtain and replace this sensor...
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  #3  
Old 06-24-2007, 10:09 PM
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Default RE: Brake Shift Interlock Issue

That is the 'brake pressure switch'.. It's main function is for speed control deactivation...

[IMG]local://upfiles/6756/227F8601100B4BB7B5638A95AE1DE634.gif[/IMG]
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  #4  
Old 06-24-2007, 11:41 PM
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Default RE: Brake Shift Interlock Issue

Here is the 'open recall' in part in regards to the brake pressure switch.. The repair should be covered at no cost..

Safety Recall 05S28 - Supplement #10

Certain 1994-1996 Model Year Bronco, 1994-2003 F-150 through F-550, 1997-2002 Expedition, 1998-2002 Navigator, 2002-2003 Blackwood,1994-1996 E-150/250/350, 1996- 2002 E-450, 2002-2003 E-550, 2000-2003 Excursion, and 1998 Explorer and Mountaineer gasoline or natural gas engine vehicles equipped with Speed Control –
Speed Control System Modification

REASON FOR SUPPLEMENT #10
Ford has determined that the following vehicles were built with the same system configuration as previously recalled vehicles: [*]Certain early built 2003 F-Series Vehicles[*]Certain 2002-2003 E-550 vehicles[*]Certain early built 2003 Excursion vehicles[*]Certain 2003 Blackwood vehicles
[ul][/ul]
AFFECTED VEHICLES
Year
Model
Notes

1994-1996 Bronco
1994-2003* F-Series Under 8500 GVW * Built prior to October 31, 2002
1994-2003** F-Series Over 8500 GVW(All plants except Cuautitlan) ** Built prior to November 4, 2002
1994-2003*** F-Series Over 8500 GVW (Cuautitlan built only)*** Built prior to January 7, 2003
1997-2002 Expedition
1998-2002 Navigator
2002-2003 Blackwood
1994-1996 E-150/250/350
1996-2002 E-450
2002-2003 E-550
2000-2003**** Excursion**** Built prior to November 4, 2002
1998 Explorer and Mountaineer

NOTE: Diesel engine equipped vehicles are not affected.
REASON FOR THIS SAFETY RECALL

The underhood Speed Control Deactivation Switch (SCDS) may overheat, smoke, or burn, which could result in an underhood fire. The potential for a fire exists regardless of whether speed control is being used or the engine is running. It was determined that the 2002 model year E550 vehicles and certain 2003 model year vehicles, included in this supplement, were built with the same speed control system configuration as 2002 model year vehicles included in the previous recall population.
SERVICE ACTION

At no charge to the vehicle owner, dealers are to: [*]Disconnect Speed Control Deactivation Switch wiring harness connector and check the connector for presence of brake fluid contamination on all affected vehicles.[*]If the Speed Control Deactivation Switch electrical connector is not contaminated with brake fluid: Install the Fused Jumper Harness.[*]If the Speed Control Deactivation Switch electrical connector is contaminated with brake fluid: Using compressed shop air, blow dry the Speed Control Servo electrical connector and the speed control switch harness connector. Apply Electrical Grease II to the servo connector and to the speed control switch adapter jumper harness male pin connector. Install the Brake Repair Kit (Speed Control Deactivation Switch Kit).
[ul][/ul]
Repair Process For All Vehicles Involved in Recall 05S28
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  #5  
Old 03-08-2009, 08:51 AM
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Default whaddafuc

no brake lights can't get out of park fuse is good switch has no contamination
should i replace switch on master cylinder anyway
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  #6  
Old 03-08-2009, 12:36 PM
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Default

What year vehicle?

The cruise deactivation switch is a secondary switch to cancel the cruise function.. If your interlock won't release, and you have no brake lamps it's most likely fuse/circuit protection, or a bad stop light switch.. Possibly a break in the harness wire at the brake lamp switch.. Check for brake lamp function/voltage through the stop lamp switch on the brake pedal if the fuses prove out..
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Last edited by Hayapower; 03-08-2009 at 12:40 PM.
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  #7  
Old 11-22-2009, 01:07 PM
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Default Brake Shift Interlock Issue

on my 1996 ford aerostar is having like problems, when i hit the brakes no brake lights come on. shifter will not come out of park when key is on. checked fuses #1 and #5 and replaced the brake light switch 2 times. would that be the interlock? is there a way to bypass this?
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  #8  
Old 11-28-2009, 01:39 PM
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Default Brake Shift Interlock Issue

My brake lights WILL NOT turn off even after turning off the truck. Is
this the brake light switch by the brake pedal I keep reading
about. If thats what it is, can I get it at an auto parts store and
install myself?

Thanks
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  #9  
Old 12-09-2009, 09:32 PM
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Default Brake Shift Interlock Issue

If possible, try to remove the master cylinder without undoing the brake lines. It can be done in most cases and it saves bleeding the brakes.
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Old 12-09-2009, 09:32 PM
 
 
 
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05, 2001, 96, brake, f350, ford, fuse, interlock, location, navigator, ranger, shift, shifter, switch, taurus

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