Quote:
Originally Posted by a911ebayer930
Thanks for the explanation DRACO and ischmitz. However, I replaced the DME module with no luck. Therefore, based on the attached drawing it seem to be the problem. If anyone is aware of the location of this module please let me know. Once again this is for a 1987 911.
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^^^^^
As you can see, there are two resistors in the alarm key CKT.
R1 is always engaged providing a resistive ground to pin # 31.
When the alarm goes "active" R2 resistor comes into play.
The reason for the R1 value is to prevent the "Bad guys" from just shorting
the circuit and "borrowing" your car.
Also, I suspect that shorting pin #31 might "smoke" the IC.
If the R1 circuit is open, your car will not start.
^^^^^
I don't think the Alarm module is your issue.
But, just in case, here are a few pics.
Good luck,
Gerry