Question-------------------------
Followup To
Question -
"I am having trouble diagnosing the problem I am having with the climate control, it will not select anything different now it is stuck on deforst. The vacuum pump on the fender well runs continously now and if disconnect the main line from the pump and plug it the pumps stops like it would if operating normally, but if I remove the line out of the vacuum reservior on the wheel well and plug the vent out of the reservior the pump will not shut down, like it can not product enough vacuum in the reservior to cause the pump to shut down. I can not figure out how to get the reservior off the wheel well to inspect it for any damage or leaks.
Do you have any suggestion on the reservior removal or better way to diagnose the problem?
Answer -
Vacuum Reservoir Tank and Bracket
Removal
Remove the nuts.
Disconnect the vacuum hoses and remove the A/C vacuum reservoir tank and bracket (5.4L and 6.8L engines).
Disconnect the vacuum hoses and remove the A/C vacuum reservoir tank and bracket (19A566) (7.3L diesel engine).
Installation
Follow the removal procedure in reverse order.
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just to let you know that there is a 100,000 mile warr.on these vehicles you might want to ck first if this is cover.
*********************************see below***********
I figured as much but can not find nuts referrred to remove the reservoir any suggestion on manual on the net to show attachment nuts?
Thanks for the reply.
Answertry these test and color charts if you still need help send fax #i will send you pictures step by step
ATC Solenoid and Manifold Vacuum Connector End View
Port Hose Color Function
0 Black Vacuum Source
1 White Air Inlet Duct Door
2 Yellow Panel/Floor Door
3 Blue Panel/Floor Door
4 Red Panel/Defrost Door
5 Gray Heater Control Valve
6 — Not used
Vacuum Application Chart — EATC Port Color Function Manual Override Buttons
OFF PANEL PNL/FLR FLR FLR/DEF DEF
0 Black Vacuum Source V V V V V V
1 White Air Inlet a V — — — — NV
2 Yellow Panel/Floor V NV NV V NV NV
3 Blue Panel/Floor V NV V V V NV
4 Red Panel/ Defrost NV V V NV NV NV
5 Gray Heater Control Valve b NV — — — — —
a The EATC system may be manually set to enable or disable the recirculation of cabin air by pressing the RECIRCULATION manual override button in all manual override modes except DEFROST.
b The automatic temper control solenoid and manifold will supply vacuum and close the heater control valve depending on the EATC module settings and ambient conditions in any setting except OFF.
V = Vacuum
ATC Solenoid and Manifold Vacuum Connector End View
Port Hose Color Function
0 Black Vacuum Source
1 White Air Inlet Duct Door
2 Yellow Panel/Floor Door
3 Blue Panel/Floor Door
4 Red Panel/Defrost Door
5 Gray Heater Control Valve
6 — Not used
Vacuum Application Chart — EATC Port Color Function Manual Override Buttons
OFF PANEL PNL/FLR FLR FLR/DEF DEF
0 Black Vacuum Source V V V V V V
1 White Air Inlet a V — — — — NV
2 Yellow Panel/Floor V NV NV V NV NV
3 Blue Panel/Floor V NV V V V NV
4 Red Panel/ Defrost NV V V NV NV NV
5 Gray Heater Control Valve b NV — — — — —
a The EATC system may be manually set to enable or disable the recirculation of cabin air by pressing the RECIRCULATION manual override button in all manual override modes except DEFROST.
b The automatic temper control solenoid and manifold will supply vacuum and close the heater control valve depending on the EATC module settings and ambient conditions in any setting except OFF.
V = Vacuum
Inspection and Verification
Verify the customer concern by operating the climate control system to duplicate the condition.
Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart Mechanical Electrical
Loose, missing or damaged A/C compressor drive belt
Loose or disconnected A/C clutch
Loose, misrouted or damaged vacuum lines a
Broken or leaking vacuum control motora
Discharged A/C system
Broken or leaking refrigerant lines
Open fuses
Blower motor inoperative
A/C compressor inoperative
Circuitry open/shorted
Disconnected, loose fitting, or incorrectly installed electrical connectors and pins
a A leak in the vacuum control circuit may occur during acceleration (slow leak), may exist at all times (large leak), and may exist only when specific functions are selected (indicating a leak in that portion of the circuit). The vacuum hoses used in the passenger compartment control circuit are constructed from PVC plastic material. The vacuum hoses used in the engine compartment are constructed of Hytrel®. Because of the materials used, never pinch the vacuum hoses off during diagnosis to locate a leak. A wood golf tee can be used as a plug when it is necessary to plug one end of the vacuum hose for leak test purposes.
As pinpoint tests and measurements are being performed, be sure to inspect for any disconnected, loose fitting, or incorrectly installed component, module and in-line electrical connectors and pins.
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, connect a scan tool to the data link connector and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
check that the program card is correctly installed.
check the connections to the vehicle.
check the ignition switch position.
