911 Carrera Alarm Diagnostic

[aquazulu2]

Hello folks: I am hoping for some help with my 1986 911 Carrera with a no start condition. I am currently running a diagnostic on the alarm system to eliminate or repair that as a posssible cause of the no start.

I am following the Bentley manual: Troubleshooting Page 909-2 Alarm system

Probing the Alarm control module connection:

Required test: Expected results: Actual result:

* 30 & 78a Test lamp light Test lamp did not light
* Hn & 30 Test Lamp light Test Lamp did not light
E/A & 31 Alarm on 2- 3 oms 2.4 oms
E/A & 31 Alarm off 4 - 5.5 Oms 4.5 oms
MK & 30 Test Lamp on Test lamp on/ Press trunk switch off
61 & 30 Test light on Test light on (Ignition on light off)
* 15 & 31 Test light go out with Ignition on (Opposite) Light go on w/ignition
* T & 30 Open door Test lamp light Test lights did not light
31 & 30 Test lamp light Test light light on

* Indicates faults found:

With the opposite reading for terminals 15 & 31 I am wondering if the ignition has two wires incorrectly connection. any suggestion to help me with this repair would be most appreciated..

Thanks

John

[aquazulu2]

Originally Posted by aquazulu2

Hello folks: I am hoping for some help with my 1986 911 Carrera with a no start condition. I am currently running a diagnostic on the alarm system to eliminate or repair that as a posssible cause of the no start.

I am following the Bentley manual: Troubleshooting Page 909-2 Alarm system

Probing the Alarm control module connection:

Required test: Expected results: Actual result:

* 30 & 78a Test lamp light Test lamp did not light
* Hn & 30 Test Lamp light Test Lamp did not light
E/A & 31 Alarm on 2- 3 oms 2.4 oms
E/A & 31 Alarm off 4 - 5.5 Oms 4.5 oms
MK & 30 Test Lamp on Test lamp on/ Press trunk switch off
61 & 30 Test light on Test light on (Ignition on light off)
* 15 & 31 Test light go out with Ignition on (Opposite) Light go on w/ignition
* T & 30 Open door Test lamp light Test lights did not light
31 & 30 Test lamp light Test light light on

* Indicates faults found:

With the opposite reading for terminals 15 & 31 I am wondering if the ignition has two wires incorrectly connection. any suggestion to help me with this repair would be most appreciated..

Thanks

John

Checking some of my started threads to close off. Thanks for those who looked even if they could not help..

I actually received a lot of help from Dorkiphus.net - NOVA/DC/MD Porschephiles to solve this problem , I ended up changing the alarm module, and correcting a number of ground faults at the door contacts.. I was able to satisfy each diagnostic check fault and repair. I
Those folks at Dorkiphus.net - NOVA/DC/MD Porschephiles are great..

Remember to help the recruit, no one left behind..