power steering and transmisson problems not the same issue
leaking powerstering making noise is because the pump is sucking air or worn out your tranny not shifting could start with low fluid and end with a worn out tranny you need to get it maintained and or serviced
Won't start how ? crank -no start or no crank - no start ? When you turn the key to the start position what happens ? does the starter engage an spin the engine ?
Generically speaking, if the compressor is really running and there is no pressure difference, the compressor is not pumping it has gone bad. BUT, since you say it is not cycling off and on, I believe the compressor is not running but you are seeing the pulley turning only. Also if the pressure is 25 psi, it is too low as in the amount of refrigerant is low. Check the pressure switch to see if it is open or closed electrically. Not sure what the 30 amp fuse powers since you say it worked before. Start here.
Make sure radiator is full and that all hoses are ok. Then make sure that the thermostat is opening and that your water pump is circulating coolant through the radiator which must not be clogged. Till you find issue run your heater full blast with window open to add additional cooling to engine.
Do yourself a favor an take your vehicle to a qualified repair shop ! Replacing parts without doing the electrical testing is no way to fix anything . Checking B+ voltage with a DMM - digital multimeter is ! Free wiring diagrams here http://www.bbbind.com/free_tsb.html . Do you know what a automotive electrical diagram is ?
Enter vehicle info. year , make , model and engine size . Under system click on lighting then under subsystem click headlamps . Click on the search button ,then on the blue link. Circuit breakers hardly ever fail . Probably the switch or dimmer switch or a bad ground .
Basic Electricity for Service Techs Ohm law Current Flow Opens ShortsElectric Testing Techniques You Need to Know
Maybe you hooked up the wires wrong ! Do you know what a wiring diagram is ? How to do electrical testing with a volt meter ? How to test an electric fuel pump
What engine ? 3.1 or 3.8 L
DTC P1635 5 Volt Reference Circuit , do you know what this is ?
The PCM uses the 5-volt Reference A circuit as a sensor feed to the following sensors:
• The TP sensor
• The MAP sensor
• The EGR valve pintle position sensor.
The PCM monitors the voltage on the 5-volt Reference A circuit. If the voltage is out of tolerance, DTC P1635 will set.
Diagnostic Aids
Important:: Be sure to inspect PCM and engine grounds for being secure and clean.
Inspect for the following conditions:
Many situations may lead to an intermittent condition. Perform each inspection or test as directed.
Important: : Remove any debris from the connector surfaces before servicing a component. Inspect the connector gaskets when diagnosing or replacing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.
• Loose terminal connection
- Use a corresponding mating terminal to test for proper tension. Refer to Testing for Intermittent Conditions and Poor Connections , and to Connector Repairs in Wiring Systems for diagnosis and repair.
- Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections , and to Connector Repairs in Wiring Systems for diagnosis and repair.
• Damaged harness--Inspect the wiring harness for damage. If the harness inspection does not reveal a problem, observe the display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the scan tool display may indicate the location of the fault. Refer to Wiring Repairs in Wiring Systems for diagnosis and repair.
• Inspect the powertrain control module (PCM) and the engine grounds for clean and secure connections. Refer to Wiring Repairs in Wiring Systems for diagnosis and repair.
If the condition is determined to be intermittent, reviewing the Snapshot or Freeze Frame/Failure Records may be useful in determining when the DTC or condition was identified.
DTC P1635 - 5 Volt Reference A Circuit Step
Action
Values
Yes
No
1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
YES - Go to Step 2
NO - Go to Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission
2
Check the PCM and the engine grounds. Ensure that the grounds are clean and secure.
If you find a problem, repair the condition as necessary. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 11
NO - Go to Step 3
3
Turn OFF the ignition.
Disconnect the EGR.
Turn ON the ignition.
Use a DMM in order to measure the voltage between the 5-volt Reference A circuit and an engine ground.
Is the voltage near the specified value?
5 V
YES - Go to Step 5
NO - Go to Step 4
4
Is the voltage near the specified value?
0 V
YES - Go to Step 6
NO - Go to Step 8
5
Reconnect the EGR valve.
Disconnect the throttle position sensor.
Use a DMM in order to measure the voltage between the 5-volt Reference A circuit and an engine ground.
Is voltage near the specified value?
5 V
YES - Go to Step 10
NO - Go to Step 9
6
Monitor the DMM while disconnecting all other devices that are connected to the 5-volt Reference A one at a time.
If the voltage changes when one of the above components is disconnected, replace the component. Refer to the appropriate replacement procedure.
Did you replace a component?
--
YES - Go to Step 11
NO - Go to Step 7
7
Turn OFF the ignition.
Disconnect the PCM.
Check the 5-volt Reference A circuit for a short to ground.
If you find a problem, repair the condition as necessary. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 11
NO - Go to Step 10
8
Turn OFF the ignition.
Disconnect the PCM.
Turn ON the ignition.
Check the 5-volt Reference A circuit for a short to voltage.
If you find a problem, repair the condition as necessary. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 11
NO - Go to Step 10
9
Replace the EGR valve. Refer to Exhaust Gas Recirculation Valve Replacement .
Is the action complete?
--
YES - Go to Step 11
--
10
Important:: The replacement PCM must be programmed.
Replace PCM. Refer to Powertrain Control Module Replacement/Programming .
Is the action complete?
--
YES - Go to Step 11
--
11
Review and record the scan tool Failure Records data.
Clear the DTCs.
Operate the vehicle within the Failure Records conditions.
Use a scan tool in order to monitor the Specific DTC info for DTC P1635 until the DTC P1635 test runs.
Does the scan tool indicate that DTC P1635 failed this ignition?
--
Go to Step 2
System OK
PCM grounds at G113
G113
Lower left front of the engine, on the transaxle stud, near the starter
How to check the 5v reference circuit for short to ground Cadillac
