there are some lighted switches that need two wires to ground or hot depending how yo wiring them.
I do 99.9% of my circuit debugging using both the following:...How in the hell can I check for shorts or trace circuits?...
Is that on a brake light with a wig-wag modulator?And when testing DCV, the meter fluctuates wildly, as if I were testing an AC circuit in DC mode.
I tried different multimeters with the same results. I cannot possibly isolate circuits- especially if I am checking live voltage or simply trying to determine which wire is ground.
What is making the circuits act like that?
PS- I have never seen this in automotive circuits before- admittedly it has been maybe 20 years ago. Could it be the on board computers, etc?
> Hook your (non-powered) 12V test light to positive on battery, then probe around anywhere to find ground.... 12VDC test light... will only show a live circuit, not... tell me which is ground...If I rig up a simple continuity tester, you think that might work?..
> Connect meter leads to battery terminals... if you get 12V there, then there's typically not much need to check voltage anywhere else, just continuity....how do I test the voltage amount? Admittedly all my meters are digital. Should I get an analog meter?...