|
Re: 4X4 Enabled Causing A/C Redirection to Defroster Vents.
Possible causes include vacuum pump, front knuckle seals, pulsed vacuum solenoid and/or tubing/hoses to knuckles.
When 4X4 is engaged, a strong (~11 inches) vacuum signal is sent to the front hubs for about 30 seconds or so. When 4X4 is disengaged, a much weaker (~5 or 6 inches) vacuum signal is sent to the front hubs.... this also lasts about 30 seconds or so.
After the 30 second period is up, in either case, vacuum supply to the hubs is turned off.
|
