errin, you might want to call the manufacturer. All multimeters hae two leads, negative and positive. When you're testing a circuit you normally hook up the negative to ground and the positive to the line you want to test (i.e. the injector hot lead) but some meters have multiple sockets to put the leads in. A multimeter with a "duty cycle" reading sounds like a high end Fluke meter...but whoever makes it should be able to tell you how to use it if they didn't put in an instruction booklet.
I hve one of Harbor Freight's outstanding $2 meters. I leave it in the car "just in case" because I don't an expensive one to get stolen. For two bucks...it is almost as entertaining as a Magic 8 Ball. Almost as accurate, too.<G>
--Original owner, '85 Corolla GTS. Will trade for a Cadillac-Gage V150, or a Ford GT, in similar condition.
it does have multiple sockets but the book tells me which ones to put it in depending on which test. but again im not sure which it would be. i dont think its the current one but i could be wrong. i tried to call the manufacturer but whenever i remember they are closed since they are east coast based.
its a craftsman and it was under fifty bucks. nothing against my harbor freight meter, i just wanted the clamp.
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