Guest bastaad525 Posted July 4, 2004 Share Posted July 4, 2004 Okay, I'm trying to track down a little problem here, and one possible thing I need to check/fix, is the ground wire of my MAF. I need to use a voltmeter, one sensor connected to the MAF ground wire, the other to a good ground source on the engine, and measure the voltage going thru there with the car at idle. It should read 9mv (or .009v) or less. Problem is... I have NO idea how to use the voltmeter. The thing just has the one dial on it, and like 20-30 different settings. The settings are divided by category, like DCA, DCV, and AC something, and in each category are settings that all start with the number 2, like 20, 200, 2000, and sometimes they have this little funky shaped simple that looks like a cross between a u and a p. Okay so I"m a newb... anyways... was just hoping you guys could tell me, what I need to set the dial to on the voltmeter to check for at or around .009 volts. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted July 4, 2004 Share Posted July 4, 2004 Your going to want to set it up for DCV. The meter I have has 4 settings for DCV. 200mV, 2V, 20V, 200V, and 1K V. If you had the same settings as me I would put it on the 20V to start with and if it doesnt read low enough then I would put it on the 200mV scale. The thing to remember with these meters is to always start with a higher setting and work your way down. This way you will save fuses! Its more important when you are using the ohm meter and ampmeter fuctions though. Oh and if you are checking the voltage at your MAF, you will have to backprobe it. What really works nice is a set of custom made wires that have darning needles soldered on the ends. It really makes backprobing easy and you dont damage the connector wires trying to crame in those huge terminals that are on meter wires! Guy Quote Link to comment Share on other sites More sharing options...
strotter Posted July 4, 2004 Share Posted July 4, 2004 Custom-made wires? No need. Get a couple of alligator clips, the kind with a screw on them for locking the wire. Place them over the voltmeter (VOM) probes (may take some "persuading") , lock them down. Now you can clip one end to a good ground, and clip the other to the darning needle (I use an old ice pick). Quote Link to comment Share on other sites More sharing options...
Tim240z Posted July 4, 2004 Share Posted July 4, 2004 Simple google search: http://www.multimeterwarehouse.com/usingamultimeter.htm http://www.doctronics.co.uk/meter.htm http://techrepublic.com.com/5100-6255-1053275.html http://zone.ni.com/devzone/conceptd.nsf/webmain/D902E80AE80E87EA86256E0D007D4852 and on and on and on and on...... Quote Link to comment Share on other sites More sharing options...
80LS1T Posted July 5, 2004 Share Posted July 5, 2004 Strotter, I used to do it that way too but I always got frusterated when the darning needs would come out of the aligator clips. This way they cant! Guy Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted July 5, 2004 Share Posted July 5, 2004 cool guys thanks for the info Quote Link to comment Share on other sites More sharing options...
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