780 V6-2849cc 2.8L SOHC B280F (1987)
Technical Service Bulletin # 3910
Date: 870801
Anti-Theft Device Watchdog - Fault Tracing
SECTION
GROUP
NO.
39
10
DATE AUGUST 1987
RE "WATCHDOG" ANTI -THEFT DEVICE FAULT TRACING
700
THIS BULLETIN APPLIES TO THE U.S. AND CANADA
REFERENCE:
This supersedes information in TP 31061 (English), 1987 780 New Car Features
Fault tracing - anti-theft device "Watchdog" (accessory P/N 1343409-7)
Fault Tracing
A.
Not possible to turn alarm off
Flick finger against lock plate and try again.
If this does not work, disconnect wires from pin 1 (start disabler relay) and pin 2 (+12V) in monitor box. It should now be possible to
start engine.
If it is not possible to start engine, fit a new start disabler relay or connect a bridge wire across the old switch according to next step.
B.
Start disabler does not disengage
Carry out operation A.
