Electrical Systems Flashcards
7 cards from real ASE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Systems flashcards as text
Only the left headlamp is dim while the right one is normal. What is the most likely cause?
Answer: A high-resistance ground at the left headlamp
A problem affecting one lamp only points to a fault in that lamp's own circuit, usually a poor ground.
A fuse blows instantly every time a circuit is switched on. What type of fault is most likely?
Answer: A short to ground
A short to ground bypasses the load, causing excessive current that instantly blows the fuse.
On a standard ISO automotive relay, which terminals are connected to the control coil?
Answer: 85 and 86
Terminals 85 and 86 are the coil, while 30 and 87 are the switched contacts.
During a battery load test at 70°F with a load of half the CCA rating for 15 seconds, voltage should not fall below:
Answer: 9.6 V
A good battery should hold at least 9.6 V under a half-CCA load for 15 seconds at 70°F.
Why should a high-impedance digital multimeter be used instead of a test light on computer circuits?
Answer: A test light can draw enough current to damage sensitive electronics
A test light's current draw can damage low-current module circuits, while a 10-megohm DMM draws almost nothing.
A starter draws much higher than specified current and cranks slowly. Which is a likely cause?
Answer: A shorted armature or a mechanically tight engine
High current draw with slow cranking indicates excessive load such as a shorted armature or binding engine.
The right turn signal flashes much faster than normal, while the left is fine. What is the most likely cause?
Answer: A burned-out bulb on the right side
Reduced load from a burned-out bulb makes a thermal or load-sensing flasher cycle faster on that side.