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Re: 2000 Astro Interior lights and window problems
Do you have the faqctory keyless entry? RKE?
if so... Here is how it is supposed to work
I'd check the RAP fuse first
Retained Accessory Power (RAP) Operation
The Retained Accessory Power (RAP) feature utilizes the Body Control Module (BCM) to control the operation of the Power Windows and the Radio. It also controls the operation of the Rear Radio Control and Overhead Console (if equipped). The RAP Relay is powered by the RAP Fuse, and controlled by the BCM. When the ignition switch is turned to the OFF position, the BCM supplies a ground to the coil side of the RAP Relay. This allows power to flow through the Relay to the listed systems. The BCM will turn off the RAP system by removing the ground path from the RAP Relay if any of the doors are opened, or after 20 minutes when the BCM times out.
Interior Lighting System Description
Vehicles with the optional remote keyless entry (RKE) system have interior lighting controlled by the body control module (BCM).
This vehicle uses a delayed interior lighting system.
The system functions as follows:
The dome lamps will illuminate when any door is opened.
The dome lamps will remain on for 20 seconds after the last door is closed.
The delay is canceled and the dome lamps will go out when the ignition switch is turned to the ON position.
The illuminated entry function will not operate when the dome lamp defeat switch is in the OFF position.
The interior lighting system is protected from battery rundown by the retained accessory power (RAP) system. The RAP system functions by shutting down interior lights after 10 minutes (when ignition is OFF).
Interior Lights Circuit Description
When the interior lamps circuits are closed/enabled, the courtesy lamp relay is activated by the two following coil circuits:
CKT 690 (GRY/BLK) which is the courtesy lamp enable output of the body control module (BCM) driving the coil side of the relay.
CKT 1732 (ORN) which is the coil output side of the relay going to the potential grounding switches/sources.
When the courtesy lamp relay is enabled, CKT 156 (WHT) (courtesy lamp output) is enabled by the closed contact at the relay and then grounded by CKT 750 (BLK) at G110.
Some of these circuits can also be activated with the headlamp and panel dimmer switch. When this happens, the coil output side of the inadvertent power relay is grounded to the body control module (BCM) via CKT 1393 (DK BLU)
CKT 40 (ORN) from the courtesy fuse drives both input sides of the inadvertent power relay. When the contact is pulled closed, CKT 1732 (ORN) is supplied power, thus driving any lamps/circuits attached that circuit and providing ground.
The body control module (BCM) also monitors the following four door inputs:
CKT 49 (DK BLU) -- LH door jamb switch input
CKT 54 (ORN) -- RH door jamb switch input
CKT 775 (PNK) -- Side door jamb switch input
CKT 656 (YEL) -- Rear door jamb switch input/liftgate strut switch input (depending on option content)
When the doors are closed, the body control module (BCM) is in a floating state of 0-2 volts. When the doors are opened, the courtesy lamp relay is activated, sending power to the courtesy lamps.
The headlamp and panel dimmer switch also activates the following interior courtesy lamps when the switch is placed in the PARK or HEADLAMP ON positions:
RF power window switch
RH power door lock switch
LH power window switch
LH power door lock switch
LH outside rearview mirror control switch
Rear radio control head
The dome lamps can be disabled by closing the dome lamp defeat switch located on the headlamp and panel dimmer switch.
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Automotive A/C Engineer with:
'95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller.
'94 Astro- 370k miles
'94 Firebird Formula- 5.7L 180k miles- gone- blown head gasket
'92 Chevy Lumina Van 3.8L 264k miles
'86 GMC S-15 - 2.8L 154k miles
'86 Buick Park Ave 3.8L 199k miles- my daily driver
'77 Chevy Vega- 2.5L 175k miles gone but not forgotten
'68 Camaro 396 4 spd RS/SS -72k miles- my high school car!!
All but the Camaro and Firebird are white....
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