Hi Folks,
My '89 944 2.7 sometimes goes electrically dead. During the starting process, sometimes all power dies (including systems always attached to power, like door locks, parking lights etc) so I clearly have an intermittent connection between the battery +ve and circuit 30, which supplies pretty much everything. Because these systems are all around the car, and I'm certain the battery to earth connection is good, the problem has to be the +12V feed.
Can someone explain in gory detail exactly how the +12V connects to the fuse box which is in the engine compartment on this model.
I'm assuming the +12V from the battery, (in the boot) gets to the front of the car as one nice thick wire, because it's mainly got to get to the starter, but I don't know if it goes on to all the other systems after it gets to the starter, or the feed splits at some sort of bulkhed connector to be distributed to other fused systems, with a thick wire continuing from there to the starter.
Can someone give me some clues about where this bulkhead connector can be found, or if there is a known connection that can cause this sort of intermittent trouble.
The car has never died while running, though I can't see why it hasn't; perhaps vibration makes the connection ok, but it still has to deliver all the current requirements of the car. I have no idea how this works, but at least once it's started, it keeps going
cheers
Russell