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1995 Buick Park Ave Ultra problems

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Anonymous Poster

Jul 20, 2008, 2:37 PM

Post #1 of 6 (8162 views)
1995 Buick Park Ave Ultra problems Sign In

Car battery runs down when parked for more than a day & no lights have been left on.


Jul 20, 2008, 2:57 PM

Post #2 of 6 (8158 views)
Re: 1995 Buick Park Ave Ultra problems Sign In

When the car is running, take it to an Auto Zone (or other auto parts store) and ask for the free battery and alternator checks. Auto Zone can do it with battery and alternator in vehicle as can most service stations. Batteries need to supply power to parts other than starter lights. etc. Any radio with programmable stations and/or digital clock will use up power.

Anonymous Poster

Jul 21, 2008, 6:47 AM

Post #3 of 6 (8149 views)
Re: 1995 Buick Park Ave Ultra problems Sign In

We've done all this. This problem still occurs with a new battery & with battery & alternator showing to be working properly.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 21, 2008, 8:11 AM

Post #4 of 6 (8147 views)
Re: 1995 Buick Park Ave Ultra problems Sign In

In a whole day even a trunk, hood or glovebox light could take down a battery. With battery known charged and good and alt also, you can isolate which circuit is causing an excessive drain by a time tested method just unhooking neg battery cable and hooking up a test light between cable and neg battery post. With hood light if on disconnected you can remove fuses one at a time till test light goes out to find which circuit. You'll need to be creative to pull fuses without interior lights involved by testing that separately as opening a door would light up the test light.

That find the circuit involved then the chase is narrowed down.

The common toubles are ---- trunk/cargo light(s), glovebox, hood light, any map lights for interior or possible vanity mirrors that can light up when opened and don't shut off and go un-noticed - things like that,



Jul 21, 2008, 1:50 PM

Post #5 of 6 (8142 views)
Re: 1995 Buick Park Ave Ultra problems Sign In

Tom is absolutely correct. What you are experiencing is called a parasitic drain. The parasite is what ever component is staying powered up and draining your battery.
The 1995 Buick Park Avenue has RAP Retained Accessory Power (RAP) Circuit Description
The retained accessory power (RAP) system allows the following components to operate for approximately 10 minutes after the ignition switch is turned off: • The radio • The power windows • The sunroof (if equipped) • The cellular telephone (if equipped)
When the ignition switch is turned to the ACCY or the RUN position, voltage is applied from the IP junction block WSW/RFA fuse to the remote function actuator (RFA) module. When the RFA module grounds terminal 86 of the RAP relay, the RAP relay energizes and supplies power to the RDO/PH fuse and the SUNRF fuse (if equipped).
When the ignition switch is turned to the OFF position, the voltage from the IP junction block WSW/RFA fuse to the RFA module is removed. The RFA module continues to ground terminal 86 of the RAP relay for 10 minutes or until any passenger compartment door is opened. The RFA module receives the passenger compartment door status from the driver door module (DDM) through the class 2 serial data line. When either event occurs, power is removed from the rear junction block RDO/PH fuse and the rear junction block SUNRF fuse (if equipped).
This does not mean that something is awake that is not on the RAP circuit. I have had OnStar modules stay awake and take down the battery. It is imperative to take out the fuses one at a time, starting with the Underhood bussed electrical center
here is a list ofm what those fuses power up, start here, if one of these stops the drain let me know which one and I will give a detailed description on the source(s) of that circuit and the best method of approach to resolving this issue.
Fuse/Circuit Breaker

SBM LCM Fuse 2
10 A
Body Control Module (SBM), Instrument Cluster, Lamp Control Module (LCM), Remote Function Actuator (RFA) Module

T/SIG Fuse 3
10 A
Turn Signal/Hazard Switch

OXY SEN Fuse 4
10 A
Oxygen Sensors

SIR Fuse 5
10 A
Inflatable Restraint Sensing and Diagnostic Module (SDM)

PCM Fuse 6
10 A
Mass Air Flow (MAF) Sensor, Powertrain Control Module (PCM)

A/C CLU Fuse 7
10 A
A/C Clutch Relay, Boost Control Solenoid

IGNFD Fuse 8
10 A
1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, ABS/TCC Switch, Evaporative Emissions (EVAP) Purge Valve, Torque Converter Clutch (TCC PWM SOL) Valve

HORN Fuse 9
30 A
Horn Relay

INJR Fuse 12
10 A
Fuel Injectors

C3I Fuse 13
10 A
Ignition Control Module

10 A
Right High Beam Headlamp

10 A
Left High Beam Headlamp

10 A
Right Low Beam Headlamp

10 A
Left Low Beam Headlamp

STOP Fuse 20
20 A
Stoplamp/BTSI Switch

F/PUMP Fuse 21
20 A
F/PMP Relay

RUN/CRK Fuse 22
15 A
Ignition Switch

PCM Fuse 23
10 A
Powertrain Control Module (PCM), PASS-Key® III Module

LP PK Fuse 24
25 A
B/U LP Fuse (10A), Perim LP Relay

HZDT/SG Fuse 25
15 A
Turn Signal Flasher

IGN Relay 28
A/C CLU Fuse (10 A), C3I Fuse (10 A), IGNFD Fuse (10 A), INJR Fuse (10 A), OXY SEN Fuse (10 A), PCM Fuse (10 A), SBM LCM Fuse (10 A), SIR Fuse (10 A), T/SIG Fuse (10 A)

HORN Relay 29

COOLFAN 1 Relay 30
Left Engine Cooling Fan Motor

STARTER Relay 31
Starter Solenoid

COOLFAN S/P Relay 33
Left/Right Engine Cooling Fan Motor

COOLFAN 2 Relay 34
Right Engine Cooling Fan Relay

A/C CLU Relay 35
A/C Clutch

F/PMP Relay 36
Fuel Pump

BATT 1 Fuse 37
60 A
C/LTR Fuse (15 A), CD/PH Fuse (10 A), CSTR/SBM Fuse (10 A), DDM Fuse (10 A), HTDST L Fuse (10 A), PDM Fuse (10 A), RDM Fuse (10 A), RDO Fuse (10 A), SBD Fuse (10 A), TRK REL Fuse (15 A)

BLO MOT Fuse 38
30 A
Blower Control Module

COOL FAN 1 Fuse 39
30 A
Cooling Fan Relay 1

HDLP Fuse 40
30 A
Lamp Control Module (LCM)

BATT 2 Fuse 41
60 A
C/LTRL Fuse (15 A), C/LTRR Fuse (15 A), ELC Circuit Breaker (30 A), HTDST R Fuse (10 A), MEM/RFA Fuse (10 A), PWR Seat Circuit Breaker (25 A)

IGN Fuse 42
40 A
ACCY Relay, IGN 3 Relay, RUN Fuse (10 A)

30 A
Starter Relay

COOL FAN 2 Fuse 44
30 A
Cooling Fan Relay 2


Jul 21, 2008, 1:52 PM

Post #6 of 6 (8142 views)
Re: 1995 Buick Park Ave Ultra problems Sign In

here is a picture of the underhood bussed electrical center cover
This goes with the numbered fuse descritpion listed in my first reply

(This post was edited by flgmtech1 on Jul 21, 2008, 1:53 PM)
Attachments: attachment icon a1.gif (20.7 KB)

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