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brake pedal sensor wiring

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Old Apr 19, 2022 | 09:38 AM
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brake pedal sensor wiring

Was having an issue with the brake lights not working at all pedal positions. They would come on until you got passed about halfway and then with pedal pressed they stayed off.

I looked under the dash and found that one of the 2 wires coming off the back of the pedal assembly had a decent bit of wire insulation missing and it appeared the frayed wires were losing connection when getting stretched. I put some electrical tape around that are and at the moment it is working fine but obviously not a permanent fix.

My question is this...Can I just replace those wires, or is there a whole assembly I need to get?
 
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Old Apr 19, 2022 | 11:57 AM
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Look for a plunger switch that is attached to the pedal assembly. It should be adjustable with an outer switch body nut. Sounds like that is loose and maybe not adjusted correctly.
 
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Old Apr 19, 2022 | 11:59 AM
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I would be difficult to replace the entire wiring for the brake light switch. That is part of the main under dash wiring harness. If the wires are frayed just where it plugs into the switch, you can cut the damaged section out and splice in a new section.
 
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Old Apr 19, 2022 | 12:13 PM
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Do you have a switch that looks like this? Pay no mind to the aftermarket cruise control switch attached to the pedal. X2 it should be easy to replace the damaged wiring and give you more slack, so it is not getting pulled tight.


 
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Old Apr 19, 2022 | 12:23 PM
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Originally Posted by mikeo0o0o0
I would be difficult to replace the entire wiring for the brake light switch. That is part of the main under dash wiring harness. If the wires are frayed just where it plugs into the switch, you can cut the damaged section out and splice in a new section.
That is likely what I will do is just cut out the damaged part and splice in a new wire. The part that is missing the insulation is pretty much in the middle of the wire so hopefully it won't be too hard to fix.
 
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Old Apr 19, 2022 | 12:26 PM
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Originally Posted by 77&79F250
Do you have a switch that looks like this? Pay no mind to the aftermarket cruise control switch attached to the pedal. X2 it should be easy to replace the damaged wiring and give you more slack, so it is not getting pulled tight.

I am not sure honestly....I did not get all the way under the dash yet to check that out
 
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Old Apr 19, 2022 | 04:04 PM
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That part is not really way up under the dash, it should be right there just up from the brake pedal.
 
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Old Apr 20, 2022 | 08:01 AM
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Originally Posted by 77&79F250
That part is not really way up under the dash, it should be right there just up from the brake pedal.
I just couldn't get the angle...between family's cars visiting for easter and stuff I could not even open the door halfway...I am gonna check it all out later
 
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Old Apr 20, 2022 | 08:04 AM
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Ah there is always a passenger side door, yea long way to go to get an eyeball in the cab on something. Lol
 
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