Carl Heideman
Carl Heideman
6/2/22 11:28 a.m.

In this digital age, we’ve got LED and LCD readouts on practically everything we look at: stereos, microwaves, clocks, thermometers, dash displays and even hand tools. Dials and lights are seemingly a thing of the past, but these new gadgets can often complicate a job in their efforts to make it easier.

When it comes to solving electrical problems on …

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APEowner
APEowner GRM+ Memberand SuperDork
6/2/22 12:49 p.m.

Good article.

My favorite feature of an old school incandescent test light is that it requires current to illuminate and is therefore a better indicator of a good circuit than a voltmeter or an LED test light.  You can get a 12 volt reading on a voltmeter or light an LED through a pretty crappy connection but to light a test light you need a good one.  More than once I've quickly found a connection problem in a lighting circuit using a test light that someone had spent hours trying to track down with a meter.

A test light is also the quickest way to test fuses in a fuse box.  Turn on the key and the headlights and the light should illuminate when you touch the probe to each end of the fuse. No need to pull the fuses and look at them and because it's so quick to check them it's not even worth figuring out which fuse might cause the problem you're troubleshooting.  Just check them all and if you find a bad one then confirm it's in a related circuit.

Paul_VR6 (Forum Supporter)
Paul_VR6 (Forum Supporter) SuperDork
6/2/22 12:54 p.m.

Next article: how to repair your burned out sensitive electronics from using our test light and poking the wrong bits cool

f1carguy
f1carguy New Reader
6/2/22 2:50 p.m.

send me an email and you can get a real fuse center

chandler
chandler UltimaDork
6/2/22 3:21 p.m.
Paul_VR6 (Forum Supporter) said:

Next article: how to repair your burned out sensitive electronics from using our test light and poking the wrong bits cool

Exactly, I watch for test lights in the shop and ask the techs what the heck they are using them on. Anything in our line of work can be tested by plugging in a computer and testing one of the 47 computers running the brains.

APEowner
APEowner GRM+ Memberand SuperDork
6/2/22 5:05 p.m.
chandler said:
Paul_VR6 (Forum Supporter) said:

Next article: how to repair your burned out sensitive electronics from using our test light and poking the wrong bits cool

Exactly, I watch for test lights in the shop and ask the techs what the heck they are using them on. Anything in our line of work can be tested by plugging in a computer and testing one of the 47 computers running the brains.

One certainly should be aware of where they're poking a test light but if you know what you're doing they're often the best tool for the job. 

Paul_VR6 (Forum Supporter)
Paul_VR6 (Forum Supporter) SuperDork
6/2/22 8:12 p.m.
APEowner said:
chandler said:
Paul_VR6 (Forum Supporter) said:

Next article: how to repair your burned out sensitive electronics from using our test light and poking the wrong bits cool

Exactly, I watch for test lights in the shop and ask the techs what the heck they are using them on. Anything in our line of work can be tested by plugging in a computer and testing one of the 47 computers running the brains.

One certainly should be aware of where they're poking a test light but if you know what you're doing they're often the best tool for the job. 

I would say that a very high % of the time, the operator of such a tool does not have that knowledge. laugh 

californiamilleghia
californiamilleghia UltraDork
6/2/22 8:38 p.m.
I would say that a very high % of the time, the operator of such a tool does not have that knowledge. laugh 

Ok , I do not have the knowledge , please tell me what NOT to do....

newest car I have is. 2005 Chevy Express van , 

I doubt I can screw up my old air cooled VWs !
 

Thanks

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