I've bypassed the safety switch on every mustang I've ever owned. It's pretty common among guys who go to the track often and like to start the car from the outside in the pre-staging area. Wiggle the shifter to make sure it's in neutral and turn the key. I've never had an accident.

Also, a lot of rock climbers will disable the clutch safety switch because it SUCKS to have to push the clutch to restart a stalled 4x4 on a steep incline. Everybody has their reasons.

 

They were both red/blue. Just out of curiosity, why does the computer need to know when the clutch is pressed? I've swapped a T-5 into an automatic 5.0 mustang before and had to swap the car's ecm with one out of a manual car because the automatic ecm "anticipates" when the transmission should switch gears and adjusts parameters accordingly. Are there parameters that are computer controlled related to the clutch engagement in a manual F-150? In the time I spent tuning mustangs, I've never come across any, but then again, the mustang and the F150 are two completely different animals. Regardless, I'll pull the jumper out until I find out more information. Thanks for the heads up!

 

i actually bypassed it by taking off that big switch on the cluth pedal and running a large screw through it.

 

I'm not exactly sure why the computer needs to know when the clutch is pressed in, it could be for certain drivability issues but I do know that it usually uses that information to enrich the fuel for starting purposes. So with it bypassed you may get minor starting issues.

 

Interesting. I'll have to look into that. Thanks again.

 

For Error code scans or running, i think that circuit has to be completed before the ignition becomes active, It's a momentary switch. by jumping it, the assumption is, the clutch is always depressed, for starting purposes anyway. Someone had mentioned when running a KOEO test the codes stopped after that code #67. No other error codes registered after that one or a code noting the KOEO test completed. His drivability problems implied he should have had other codes. In fact the only codes prior to the #67 was temperature related because the engine wasn't at norm. op. temp. My thought is the scan could not complete because the clutch did not remain depressed. Anybody have this experience w/ their truck. Mine's auto,

 

might also try spraying up linkage with pb blaster.... may not be the fix but it cant hurt

 

I never push the clutch in on mine and I've never gotten that code.

While rechecking my diagrams I noticed that the computer only receives a signal from the switch while the starter is engaged. It doesn't know when you push the clutch while you are driving.

 

So it's specific to the starter circuit only, not the ignition circuit, as a precursor to function.
So how do you get a #67 O /Neurtal pressure switch (NPS) circuit failure/circuit open?// In the manual for my Code Reader (Innova model #3145), it states "For 4.9L engines w/ standard transmission: Press & hold the clutch until all Codes are sent."

 

I guess I do press the clutch with the engine running test. The truck is off when you connect the jumper. Then you start it, so it checks the switch when you start it. It should be more of an engine running code, if it comes on with the engine off test then it must be magic.