What are these wire coming from the BCM?
What are these wire coming from the BCM? 
On the black connector, when I mess with these wires and or maybe the blue connector wires my radio and windows stop working, if i jiggle them they will cut out and if i move them again it tends to turn them back on.
Tried to isolate the diffrent wires to try to find out which one was causing the radio to turn off but it is hard to really isolate them because they are all tied together so if you shake one your shaking the other
Also another problem with the radio and everything working, when I shut the engin off but dont open the door the radio turns off (IE not paying attention to the RAP module)
Also have no idea if this is related or not but started around the same time as the radio turning off, some times my fuel pump primes nice and loud (walbro 255) and other times it is not that loud and the car has a hard time starting turning over alot of times before it starts
Joined: Nov 2003
Posts: 11,329
Likes: 346
From: Jacksonville, FL (originally from Toronto Canada)
The dark blue wire in the black connector at the BCM is the RAP power feed (the BCM controls the RAP function). It sounds like that wire is loose in the connector.
I think it was lose making my RAP flip out shutting off my radio and windows, Fixed it (or hope I did) took it for a drive and it did not go off once but Ill wait and see if it is really fixed it.
Fuel pump still acting funny, half the time it primes right and starts nice and strong, the other half i dont think it really primes and it is a very hard start. I have an optima redtop thats right over a year old so I doubt that is the problem. Might be the connection from the battery or where ever it gets its power, I have checked all the fuses and they are all fine. Could be were it gets its power or at the pump, aftermarket pump could be the connection there, did not want to pull the pump but I might if I cant figure it out by next weekend.
Anyone with any help on the fuel problem would be greatly appreciated.
Thanks alot WhiteBird you sure know your wiring
I think it could be a lose wire for alot of people and when they replace the bcm, it makes proper contact again, but the BCM does not need to be replaced, or this is my theory I will see over the next few weeks and see if it has worked, Thanks again.
Fuel pump still acting funny, half the time it primes right and starts nice and strong, the other half i dont think it really primes and it is a very hard start. I have an optima redtop thats right over a year old so I doubt that is the problem. Might be the connection from the battery or where ever it gets its power, I have checked all the fuses and they are all fine. Could be were it gets its power or at the pump, aftermarket pump could be the connection there, did not want to pull the pump but I might if I cant figure it out by next weekend.
Anyone with any help on the fuel problem would be greatly appreciated.
Thanks alot WhiteBird you sure know your wiring
I think it could be a lose wire for alot of people and when they replace the bcm, it makes proper contact again, but the BCM does not need to be replaced, or this is my theory I will see over the next few weeks and see if it has worked, Thanks again.
Joined: Nov 2003
Posts: 11,329
Likes: 346
From: Jacksonville, FL (originally from Toronto Canada)
The fuel pump is only indirectly controlled by the BCM. As part of the theft deterrent system, the BCM sends a "fuel enable" signal to the PCM which then trips the fuel pump relay.
The dark blue wire in the large blue connector at the BCM is the fuel enable wire. That is the first place I'd look since you were already having problems with loose connections at the BCM.
The next most likely suspect would be the fuel pump relay. Since a relay is an electromechanical device, they have a tendency to wear out eventually and provide intermittent operation (or fail completely). The relay is in junction box #2 under the hood on the left fenderwell.
The dark blue wire in the large blue connector at the BCM is the fuel enable wire. That is the first place I'd look since you were already having problems with loose connections at the BCM.
The next most likely suspect would be the fuel pump relay. Since a relay is an electromechanical device, they have a tendency to wear out eventually and provide intermittent operation (or fail completely). The relay is in junction box #2 under the hood on the left fenderwell.
