HELP:radio not working right...
07-03-2008, 09:50 AM
#1
12 Second Club
Thread Starter
iTrader: (6)
Join Date: Jul 2007
Location: chi-town
Posts: 205
Likes: 0
Received 0 Likes
on
0 Posts
HELP:radio not working right... Well heres the issue, it is very strange to. It only does this once in a while but latley its been an everyday thing and its driving me nuts. My radio will turn off while im driving, and when i mean turn off i mean it has no power, and when it goes into this state my windows will not work, and if i hit the top of the dash above the radio iot will turn back on then turn off again later. please help this is driving me nuts, could this possibly be a bad head unit???
07-06-2008, 08:25 AM
#5
The radio and windows are powered by the RAP (Retained Accessory Power) circuit which continues to provide power for several minutes after the ignition is turned off until a door is opened. The RAP circuit is controlled by the BCM (Body Control Module) - a black box about the size of a paperback mounted to the ductwork under the dash behind the glovebox.
Several members have experienced intermittent cut-out of the RAP circuit causing the radio and windows to stop functioning even when the car is running. This can be caused by a loose connection of the RAP wire at the BCM, a loose pin in the BCM connector, or a faulty BCM. The first two conditions can be repaired but the BCM itself is not serviceable - it can only be replaced.
Check for a loose wire or pin by moving the dark blue wire in the black BCM connector to see if the radio cuts out. If you don't find a loose connection then you'll have to replace the BCM. A new BCM will program itself to match the resistor in your ignition key when it is first activated. This programming can only happen once - once set, the BCM can not be reprogrammed. A used BCM has only a 1 in 15 chance of matching the resistor in your ignition key so you probably will need to bypass the VATS Pass-Key II system. VATS bypass is a fairly common procedure used when installing remote start systems so most good car audio shops can do it for you. You can do it yourself for the cost of a few resistors if you have some electrical experience.
Several members have experienced intermittent cut-out of the RAP circuit causing the radio and windows to stop functioning even when the car is running. This can be caused by a loose connection of the RAP wire at the BCM, a loose pin in the BCM connector, or a faulty BCM. The first two conditions can be repaired but the BCM itself is not serviceable - it can only be replaced.
Check for a loose wire or pin by moving the dark blue wire in the black BCM connector to see if the radio cuts out. If you don't find a loose connection then you'll have to replace the BCM. A new BCM will program itself to match the resistor in your ignition key when it is first activated. This programming can only happen once - once set, the BCM can not be reprogrammed. A used BCM has only a 1 in 15 chance of matching the resistor in your ignition key so you probably will need to bypass the VATS Pass-Key II system. VATS bypass is a fairly common procedure used when installing remote start systems so most good car audio shops can do it for you. You can do it yourself for the cost of a few resistors if you have some electrical experience.
Trending Topics
07-07-2008, 05:05 PM
#8
https://ls1tech.com/forums/showthrea...ght=solder+bcm
This thread should really be a sticky in this section. It fixed the problem for me. For 2 years I dealt with the radio cutting in and out and all it was was a crack in the solder on one of the connections inside the BCM. Very easy fix. It hasn't cut out now for 2 months.
This thread should really be a sticky in this section. It fixed the problem for me. For 2 years I dealt with the radio cutting in and out and all it was was a crack in the solder on one of the connections inside the BCM. Very easy fix. It hasn't cut out now for 2 months.