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Old 01-16-2015
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Park Switch?

I have a 2009 XLT 4.0 4x4 auto and was wondering if there is a park switch on the shifter or transmission? I was thinking about wiring the daytime running lights so that they would turn off when I was parked without having to put on the park brake.
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Old 01-17-2015
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Just tap the NSS wires at the trans range sensor. Its on the side of the trans and connects to the shifter cable then the DRL's will turn off when in park or neutral. But to prevent backfeeding the circuit id use it to activate a relay or use a resistor so that the current only flows to the lights and not back into the NSS circuit since that would cause wacky issues.
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Old 01-17-2015
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Not sure the NSS would work, it is just a connection that passes power if key is in the START position.
So when in Park(or neutral) it isn't a ground or a power source, it is just a wire connected to starter relay/solenoid and ignition switch, so nothing there to trigger a relay.

I think the PCM would have a Park detection circuit, not sure if it is an active circuit you could use as a trigger.
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Old 01-17-2015
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Yeah didn't think of that RonD. I never read voltages on that circuit mines just bypassed for the manual trans.
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Old 01-18-2015
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Just as a thought, there used to be a Ground for the 4x4 module on the NSS.
You have to be in Park or Neutral to shift into 4WD Low, so the NSS had a wire to module that is a Ground in Park or Neutral.
Even if you have a 2WD, not a 4x4, the contact would still be on the switch

If you were to run DRLs thru a relay on 30 and 87a poles, so DRLs would be on if relay is OFF.
Then power to the coil(85) and splice 86 coil side to NSS 4x4 wire.
So when trans was in Park/neutral relay would close and DRLs would be off, when in gear relay would open and DRLs would be on.
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Old 01-20-2015
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Quote:
Originally Posted by RonD View Post
Just as a thought, there used to be a Ground for the 4x4 module on the NSS.
You have to be in Park or Neutral to shift into 4WD Low, so the NSS had a wire to module that is a Ground in Park or Neutral.
Even if you have a 2WD, not a 4x4, the contact would still be on the switch

If you were to run DRLs thru a relay on 30 and 87a poles, so DRLs would be on if relay is OFF.
Then power to the coil(85) and splice 86 coil side to NSS 4x4 wire.
So when trans was in Park/neutral relay would close and DRLs would be off, when in gear relay would open and DRLs would be on.
That sounds perfect.
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