What is the function of measuring the three wires on the ignition coil of the old Buick Excelle?
2 Answers
The functions of the three wires on the ignition coil of the old Buick Excelle are: 1. Power wire: Provides voltage from the ignition switch and main relay; 2. Ground wire and control by the engine ECU: The control signal wire is the switch signal output from the ECU computer circuit board, which controls the ignition signal. The independent ignition system does not have high-voltage wires because the coil output is directly connected to the spark plug. 3. Introduction to the Excelle: The Excelle has a length of 4468mm, width of 1765mm, and height of 1469mm, with a wheelbase of 2611mm, front track of 1495mm, rear track of 1502mm, and a top speed of 170km/h.
I've repaired quite a few ignition coils on old Excelle models. Measuring those three wires is mainly for diagnosing ignition issues. As a DIY enthusiast car owner, I've learned that these three wires respectively control power supply, ignition signal, and ground circuit connectivity. Using a multimeter to check whether the power wire has normal 12V voltage, whether the signal wire can receive pulse signals from the control module, and whether the ground circuit has open or short circuits - these are common problems. For example, my Excelle once failed to start precisely because of a broken signal wire causing misfire, and timely detection prevented the danger of stalling on the road. This measurement step is simple but crucial - it can save you money on garage visits while gaining some knowledge, which feels quite rewarding. Regular attention to voltage and circuit conditions can extend the ignition system's lifespan.
