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My truck: 2018 Lariat, 3.0L, FX4
I recently added a 2.5" level kit to my truck. Upon reinstallation I had observed my front axles were remaining connected to the wheel hub while in 2wd & engine running. So I decided to do a brake & 4wd vacuum check.
In 2 wheel drive:
From the vac. pump to the booster vac. reads 29 inHg. From booster vac line T to IWE solenoid it reads 29 inHg.
On the output side (top male fitting) of the IWE solenoid it reads 0 inHG. Checking voltage I have a solid 14.2 volts on the white wire and the other wire I have 8.x volts. Meter was grounded to the body ground point located just above. The voltages remained constant when selecting 2wd or 4Hwd or 4Lwd. ???
I am hoping someone can help me understand why there is no low signal to the IWE solenoid when selecting different drive modes?
My understanding and I may be incorrect. While in 2wd the vacuum should be above 24inHg and holding steady all the way down to the individual IWE's. The vacuum being applied to the hub spring and prevents the axles from locking.
Then when selecting 4wd vacuum is removed via the IWE solenoid and the front hubs then lock in.
Thank you
I recently added a 2.5" level kit to my truck. Upon reinstallation I had observed my front axles were remaining connected to the wheel hub while in 2wd & engine running. So I decided to do a brake & 4wd vacuum check.
In 2 wheel drive:
From the vac. pump to the booster vac. reads 29 inHg. From booster vac line T to IWE solenoid it reads 29 inHg.
On the output side (top male fitting) of the IWE solenoid it reads 0 inHG. Checking voltage I have a solid 14.2 volts on the white wire and the other wire I have 8.x volts. Meter was grounded to the body ground point located just above. The voltages remained constant when selecting 2wd or 4Hwd or 4Lwd. ???
I am hoping someone can help me understand why there is no low signal to the IWE solenoid when selecting different drive modes?
My understanding and I may be incorrect. While in 2wd the vacuum should be above 24inHg and holding steady all the way down to the individual IWE's. The vacuum being applied to the hub spring and prevents the axles from locking.
Then when selecting 4wd vacuum is removed via the IWE solenoid and the front hubs then lock in.
Thank you
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