can anyone help with my 2008 f250 king ranch 6.4
uplifter switchs 2008 super duty
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I have done this, but the problem is when you open the circuit to the vacuum switch, it will cause a trouble code to be stored in the PCM. The check engine light will not turn on but there will be a trouble code listed. If I knew which wire fed the information back to the pcm then I could wire it up on the normally open side of the relay. I have checked for voltage on the 3 wires and when the ESOF switch is activated, power feeds in on the yellow wire but and back out on the other two wires, so I don't know which on feeds the voltage to the PCM.
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Joined: May 2008
Posts: 574
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From: SW Idaho
I have done this, but the problem is when you open the circuit to the vacuum switch, it will cause a trouble code to be stored in the PCM. The check engine light will not turn on but there will be a trouble code listed. If I knew which wire fed the information back to the pcm then I could wire it up on the normally open side of the relay. I have checked for voltage on the 3 wires and when the ESOF switch is activated, power feeds in on the yellow wire but and back out on the other two wires, so I don't know which on feeds the voltage to the PCM.
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Joined: Jul 2007
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From: Indiana
I've about given up on finding these upfitter wires. the pic supplied in the ford dealer notice DOES NOT look the same as under my dash. Last year I had to have a new smart junction box put in due to some headlight issues...could this be the reason I cant find the damn blunt cut wires??? Does anyone know of another confirguraton that Ford used for 2008 F350 job 1? Thanks.
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