Ironically, after computing these detailed power measurements, I simply measured the input current
with a multimeter, multiplied by 115 volts, and got almost exactly the same results for vampire power.
I suspected the arduino so I used a 5Volt external Power Supply but again Nothing
with a multimeter.
- So before I continue to do other diagnoses I tested the the battery
with a multimeter for certainty and I'm only getting around 10 volts when I'm suppose to be getting 12.6 volts
It might be worth checking the brake switch
with a multimeter.
Any ideas of how I can do tests (probably
with my multimeter) to find where the problem is?
= I decided to test for parasitic battery drain
with a multimeter by disconnected the negative cable and I'm getting.56 ~.80 ~ amps so nothing is really draining the battery.
Ok, so I removed the brake light fuse, disconnected the brake light switch connector and took a length of lamp cord to test continuity
with my multimeter.
A few days later I fitted a new socket on the back of the car, tested
it with a multimeter and everything was showing 12 volts when switched on.
So just to be sure it wasn't a wiring or ecu problem so I decided to test the lambda sensor directly
with a multimeter.
Some vehicles have refrigerant pressure sensors which you can backprobe
with a multimeter to see what the pressure is together with a lookup table.
I'll try checking the socket / assembly
with a multimeter, and see where that gets me.
I was messing around with electrical loads on my 98 Mazda 626 GF 2L today and noticed that the voltage I was reading at the battery
with my multimeter, didn't match the voltage the ECU was report via my scan tool.
There is +12 V at the starter (tested
with multimeter, and since the engine turns over when shorting (welding!)
Normally I'd remove a fuse and test the two connections
with a multimeter set to measure Ohms / resistance, but removing this is a non-trivial task - not only is the bolt holding it in place incredibly stiff, it's also holding the wiring together and I don't like the risk of re-assembling the wiring incorrectly or losing one of the many small parts like washers held with this bolt.
Tested connections
with multimeter, both good.
After a few minutes without doing anything but scratch my head I tested it again
with the multimeter and found power had been restored.
I also tested
with multimeter.
For the 50 amp, I can't tell by looking if it's good or not, is there a way to test
it with a multimeter without removing it?
Have you checked the new switch - i.e. disconnect the wiring loom from the switch, and check
with a multimeter that the switch is open - circuit normally, and closed - circuit when it is in reverse.
With my multimeter, the battery tested at 12.6 V while off, and between 13V and 14V while on.
Check your 30 amp fuse for continuity
with a multimeter.
Be sure to disconnect from the rectifier and not just try and pierce the wires
with the multimeter end.
You can disconnect them from the rectifier and test
them with a multimeter.
As the other reply says - check
with a multimeter first to work out which is which!
Take some voltage readings
with a multimeter.
I've checked all the fuses (even ones unrelated to the problem), and tested
them all with a multimeter even when they look fine.
There's other possibilities, if you are handy
with a multimeter you could track this down yourself, otherwise let your mechanic do it.
You can test their functionality
with a multimeter, there's how - tos on the web for that.
You could pull a door panel and get busy
with a multimeter when one is misbehaving.
However, when I tested
with a multimeter at the battery (accessories on), the readings seemed perfectly reasonable.
With a multimeter, check the resistance of the sensor cold, and then observe it as the car warms up.
IIRC you can check
this with a multimeter, but it's best to check with a scope.
Either the increased concentration of free calcium ions or their increased mobility (likely both, the researchers speculate) results in a decrease in the electrical resistance throughout the material, which can be detected
with a multimeter connected to electrodes embedded in the film.
Finding and fixing issues in automobiles, home wiring, appliances, and electronics works best
with a multimeter.
You can do a ton of automotive problem - solving
with this multimeter, including testing ignition and fuel delivery, plus starting and charging, and locating wiring issues and busted sensors.
Not exact matches
If you're doing extensive electrical work, whether it's in your home or in your vehicle, a more advanced
multimeter with more features would probably be better suited to your needs.
Note that this
multimeter lacks a frequency testing option, which can come in handy when you're dealing
with some types of sensors and signals, such as speed sensors and fuel injector control signals.
One thing to consider is that this
multimeter doesn't come
with capacitance testing capability, so if you want to identify issues in capacitance - start motors or other applications, you may prefer a different
multimeter.
The
multimeter can also measure continuity and diode testing
with beeping alerts, and has functions like data hold and maximum value hold.
The
multimeter comes
with test leads and a thermocouple that will come in handy if you ever need to test your car's heating and cooling systems.
This digital
multimeter comes
with the basic features you need for troubleshooting around the house and in the garage.
It's a great automotive
multimeter with an incredibly low price to boot!
The Tacklife
Multimeter comes
with tons of great features to help you troubleshoot electrical issues!
This digital
multimeter from Thsinde comes
with test leads and alligator clips, which are a must - have for making testing hands - free and fast.
The Fluke 115 is a part of the Fluke family of awesome
multimeters and has a ton of solid features for automotive troubleshooting as well as working
with other electronics and around the house.
Besides the Fluke 88 Series V
multimeter, you also get a carrying case filled
with silicone test leads, alligator clips, test probes, an inductive RPM pick - up probe, a temperature probe, automotive backprobe pins, an insulation piercing probe, and a ToolPak magnetic meter hanging kit.
The Neoteck 8233D PRO Pocket
Multimeter comes
with test leads, banana plug to alligator clip cables, and a 9V battery to get you started right away.
tested the injector plug
with light bulb and a
multimeter during the ignition and startup but there is no 12 V on them (the black wire has no voltage in reference to plus or minus side of battery and the red wire has 1.2 V in reference to ground)
A couple of things in this case make a difference: only a
multimeter with high impedance (to get the voltage I saw you'd need 100k — 1M in the circuit; that's more like a broken wire closed by dirty water); multiple earths showed the same reading, including those which also serve working circuits.
Maybe voltage drop the starting system if you have a
multimeter with a min max feature.