you cant always rely on a test light because a taste light always works as long as there is voltage but if there is to much resistance in the curcuit it will not show.
2007-01-01 18:19:33 · 4 answers · asked by charlie brown 1 in Science & Mathematics ➔ Engineering
to much resistance does not mean an open curcuit, therefore if there is high resistance there might be enough amperage to turn the test light cause of its high empedence, but not enough amps to run your motor leading you to a misdiagnosis
2007-01-01 18:53:24 · update #1
its true to visualy inspect the curcuit but I havnt worked on many vehicles were the the curcuit is in plain sight!
2007-01-01 19:15:07 · update #2
If you are planning on touching bare current carrying parts of a circuit, ALWAYS verify your test lamp result with something else. like a voltmeter, or a visual check that the circuit is definitely mechanically open. Test lamps fail just like anything else.
2007-01-01 19:02:25 · answer #1 · answered by Helmut 7 · 0⤊ 1⤋
exactly as you said! but its a test light not a taste light...mmm..taste lights...anyways, what you said is true:
you can sometimes test voltage in a circut by using a small light bulb. that way, it lights up when you put the current through it. BUT if its resistance is too high, it wont light, and you wont hav a correct answer.
note: LEDs olny light up when you put the contacts in the right way, with the - part on the - (cathode) contact of the LED, and the + on the + (anode) contact. you may think LED=light bulb, and wonder why its not lighting up :)
2007-01-02 02:27:11 · answer #2 · answered by cppdungeon 2 · 1⤊ 0⤋
What? That is a question? If there is too much resistance there is no current getting through. You are not going to have current and the light not light.
Hell, a broken wire would be considered too much resistance.
2007-01-02 02:32:22 · answer #3 · answered by Sowhat 3 · 1⤊ 0⤋
can we rely on the accuracy of light tests?here's what i found for you
2007-01-02 02:31:26 · answer #4 · answered by Byzantino 7 · 2⤊ 0⤋