A6 Electrical &
Electronic Systems
Review Answers
Reading Your Results: A6 Electrical and Electronic Systems, Test 2
This test comes at the same content areas from the network and the body accessories rather than the starting and charging systems. More of these questions are decided by what still works than by what does not, so the recurring skill here is using the working half of a circuit to eliminate everything it proves.
If you missed the questions where something still worked
Several questions on this test hand you a fault along with a list of things that are still functioning, and that list is the diagnosis. Both low beams working while neither high beam does means the bulbs, the grounds, and the supply are all fine, so the fault is in what only the high beams use. Door locks working from the driver's switch but not from the fob means the motors, the wiring, and the module output are proven, so the fault is in the receiving side. A power seat that moves fore and aft but will not recline means the module, the ground, and the switch assembly are all working for one function and not the other. Before choosing an answer, write off everything the working function has already proven, because it usually leaves one option standing.
If you missed the questions built on a measurement
Three questions here give you readings, and each is asking whether you know what that number is describing.
If you missed the component function questions
The three component questions here each solve a problem created by the circuit around them. A clamping diode across a relay coil gives the collapsing magnetic field somewhere to go when the coil is switched off, so the resulting voltage spike does not damage the driver or the module switching it. A clockspring is a coiled ribbon conductor that carries circuits into a steering wheel that has to rotate, which is why airbag, horn, and wheel control faults so often trace back to one part. An electronic combination flasher handles both turn signal and hazard operation and does not change rate with a burned-out bulb the way a thermal flasher does, which matters because an LED-equipped vehicle needs a different bulb-out strategy entirely.
If you missed the EXCEPT and LEAST likely questions
Four appear on this test, and the method is the same one that works on the real exam. Identify what the three real causes share before hunting for the odd one out. On the intermittent-over-rough-roads question, three answers all describe a connection that can make and break with movement, and one is a fault that would be constant. On the no-crank with no solenoid click question, three answers all interrupt the control circuit that energizes the solenoid, and one affects the high-current path after the solenoid has already pulled in. Naming the shared trait first is faster and far more reliable than working through four options one at a time.