Wont shift out of park and HVAC wont work
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Wont shift out of park and HVAC wont work
Hey guys!! I am hoping you can help me. I have a 2006 F250 with a 6.0 Powerstroke 4x4. I have been having some issues with the blend door not working. The EATC would change the vents but not the temp. I have checked and there is no power going to the blend door. I checked the fuses and all were good. So I have ordered a new EATC. It has not come in yet but now I have a new problem. Now the EATC has completely stopped working. Since the EATC has stopped working the truck will not shift out of park. It starts and runs fine but it will not shift out of park. I have been looking online but I have yet to find anyone who has had both these problems together. If you have any ideas, please let me know!!
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Joined: Jul 2006
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Welcome to the site..
The EATC and the trans Shift Interlock share fuse #34 10amp in the Central Junction Box. If the fuse blows because of the climate control, there won’t be an input from the brake pedal position switch out to the interlock solenoid, and the interlock won’t release.
The EATC and the trans Shift Interlock share fuse #34 10amp in the Central Junction Box. If the fuse blows because of the climate control, there won’t be an input from the brake pedal position switch out to the interlock solenoid, and the interlock won’t release.
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Junior Member
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I just went and checked the fuse. It was ok and everything seemed to work again. As soon as the truck warmed up, the EATC shut off again and I couldn't shift out of park. Does that sound like a bad fuse or a short?? Would an EATC issue cause the problems?? I'm going to replace the EATC anyway to see if that fixes my blend door issue too. I am wondering if the short is in the EATC and that is causing the blend door problems and the shift issue..
Senior Member
Joined: Mar 2017
Posts: 389
Sounds more like an issue with the Central Junction Box than the EATC. I can't see the EATC itself having ANY connection to the shifting.
It is Fuse #24 (15A) on my truck. Re-check that closely. Re-check Fuse 23 (20A) also.
It is Fuse #24 (15A) on my truck. Re-check that closely. Re-check Fuse 23 (20A) also.
Last edited by bismic; Nov 22, 2019 at 04:53 AM.
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Joined: Jul 2006
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The fuse was “ok” Meaning visually inspected or checked with a test light/meter for power distribution at the fuse?
Fuse 34 is “Hot at all times” input into the EATC as well as Brake Pedal Switch input for the Shift Interlock Solenoid. Like bismic mentioned, there could be a drop out in the CJB itself for power distribution, or a connector/harness issue out of the CJB since both of the features share the same connector pin #. If it’s intermittent, check for power at the CJB on 34 during the drop out condition.. Weather it’s the issue or not, I’d prove out power distribution there as a first step..
Fuse 24 is a “Hot in Run” input into the EATC as well, but, it doesn’t share a circuit protection with the shift interlock function. If 24 was open or cold, the Tow Haul would be inactive.
Fuse 34 is “Hot at all times” input into the EATC as well as Brake Pedal Switch input for the Shift Interlock Solenoid. Like bismic mentioned, there could be a drop out in the CJB itself for power distribution, or a connector/harness issue out of the CJB since both of the features share the same connector pin #. If it’s intermittent, check for power at the CJB on 34 during the drop out condition.. Weather it’s the issue or not, I’d prove out power distribution there as a first step..
Fuse 24 is a “Hot in Run” input into the EATC as well, but, it doesn’t share a circuit protection with the shift interlock function. If 24 was open or cold, the Tow Haul would be inactive.
Last edited by Hayapower; Nov 22, 2019 at 10:41 AM.
Senior Member
Joined: Mar 2017
Posts: 389
The fuse was “ok” Meaning visually inspected or checked with a test light/meter for power distribution at the fuse?
Fuse 34 is “Hot at all times” input into the EATC as well as Brake Pedal Switch input for the Shift Interlock Solenoid. Like mentioned, there could be a drop out in the CJB for power distribution. If it’s intermittent, check for power at the CJB on 34 during the drop out condition.. Weather it’s the issue or not, I’d prove out power distribution there as a first step..
Fuse 24 is a “Hot in Run” input into the EATC as well, but, it doesn’t share a circuit protection with the shift interlock function. If 24 was open or cold, the Tow Haul would be inactive.
Fuse 34 is “Hot at all times” input into the EATC as well as Brake Pedal Switch input for the Shift Interlock Solenoid. Like mentioned, there could be a drop out in the CJB for power distribution. If it’s intermittent, check for power at the CJB on 34 during the drop out condition.. Weather it’s the issue or not, I’d prove out power distribution there as a first step..
Fuse 24 is a “Hot in Run” input into the EATC as well, but, it doesn’t share a circuit protection with the shift interlock function. If 24 was open or cold, the Tow Haul would be inactive.
Last edited by bismic; Nov 22, 2019 at 10:31 AM.
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