Originally Posted by
pizzaguy
THat is a fundamental failure. THe first guess is that the switch in the windshield frame (which reports that you are turning the "D" handle) is not closing, which sends a ground to the Top module at connector C1 pin 16.
The top module then tells the Body Control module to lower the windows. If the fuse to the top module is blown (in 2005, fuse 5, 25 amp, underhood fuse box), the top module is dead and can't proceed - there you go.
If pin 16 is going to ground and the fuse is good (and this is probably the case, but check anyway), then the Security module may be the issue. Very often, the cause is the security module in the passenger rear wheel well, if it gets wet, the top module cant communicate with other modules and the top will be DONE. If there is any chance water has intruded, I'd tear the trim from the entire trunk and yank the connectors from the security module - are they corroded? They should look CLEAN and SHINY. If they are bad, you need a replacement security module and the last three feet or so of wiring harness. I've personally got two tops working only by changing the harness and module -but again, it will be OBVIOUS when you tear into it, if the connectors look fine, then it's something else.
Yes, you read that right - many inoperative tops are caused by the security module, not the top system itself. If ANY module has the CAN bus compromised, or if the security module can't tell the top module that the trunk lid is fully closed, the top won't move. The top only moves when it is verified safe to operate the top pump.
WIth windows not responding, you have a fundamental issue here and this should be easy to find - may not be easy to FIX but it should be easy to find.
Me again... things just keep happening. Is there a link between the security siren and the roof control module that you are aware of. I tried to replace the siren today, and it has caused me no end of issues. I plugged it in and went to test it and nothing happened. When removing it, it clearly was not happy as there was definatley a smell of burning. It resulted in my central locking not working. The car lights flashed so it was seeing the fob. I eventually traced that down to fuse 9, which I replaced and the central locking started working again. Thought I was back to status quo only my roof is now not working. When popping the roof the windows don't go down (it was all working before fitting the siren) and the windows work fine just using the buttons. The roof was giving me flashing light so I disconnect the battery for 10 mins. This is now stopped the flashing lights but it still won't work. Have also pulled fuse 5 to no avail.
My question is, in your vast experience, do you think it is more likely to be the roof control board in the boot or could the faulty siren damage the BCM?