Hello Paige ! It sounds like you have a sick vehicle , lets see if I can help you fix it . Well the code you have has to do with lack of voltage to the ECM -engine control module.
P1633 - Keep Alive Power Voltage Too Low
Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.
- Open KAPWR circuit
- Damaged PCM
- Intermittent KAPWR Circuit
2000 PCED On Board Diagnostics II
SECTION 5: Pinpoint Tests
Procedure revision date: 01/31/2001
QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633
> QB: Introduction
QB1 CHECK BATTERY TERMINALS
Note: If KAPWR is interrupted to the PCM (that is, when a breakout box is installed or the battery is disconnected), DTC P0603/P1605 can be generated on the first power-up.
- Inspect the battery cables for loose connections, corrosion.
Are the battery terminal connections in good condition?
KEY OFF. Battery terminals are OK. GO to QB2 .
REPAIR battery terminals as necessary.
QB2 INSPECT ENGINE COMPARTMENT FOR PROPER WIRE ROUTING
- Inspect Electronic Engine Control (EC) System wiring for proximity to ignition components or wires.
Is wiring too close to ignition components or wires?
REROUTE as necessary.
Engine compartment wire routing is OK. GO to QB3 .
QB3 CHECK KEEP ALIVE POWER (KAPWR) TO PCM
Note: Refer to the PCM connector pin numbers in the beginning of this pinpoint test.
- Disconnect PCM.
- Measure voltage between KAPWR circuit at the PCM harness connector and ground.
- While observing digital multimeter, grasp the Electronic EC harness and wiggle, shake or bend a small section while working from the PCM to the dash panel.
Does the voltage reading indicate less than 10.5 volts?
ISOLATE and REPAIR open circuit.
No open in KAPWR harness circuit detected. GO to QB4 .
QB4 CHECK FOR REPEAT OF DTC P0603/P1605/P1633
- Reconnect PCM.
- Start engine and allow it to reach operating temperature.
- Run Key On Engine Off Self-Test.
- Retrieve Continuous Memory DTCs.
Is DTC P0603, P1605 or P1633 present?
REPLACE the PCM.
REPAIR other DTCs as necessary. If none, testing is complete.
You may want to take this to the repair shop , do you own a volt ohm meter ? Do you know how to use one ?