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I feel really dumHow do i use an ohm meter on the injectors

Old Mar 6, 2010 | 11:32 AM
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Default I feel really dumHow do i use an ohm meter on the injectors

I borrowed one from a friend, they are supposed to read 12 ohms. I know the omega sign is the ohm side, i pulled the connector off and tried with truck key turned on, and off, i put the red and black testers on each pin in the injector and all it does is read zeros. what am i doing wrong. please help. parts store closes in an hour and i need to get an injector if it test bad.
 
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Old Mar 6, 2010 | 11:40 AM
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Most multimeters have multiple lead pionts. Make sure that your black lead is in common and your red is in the one labeled "V" or ->l- or Ohm. Did you try other injectors? Reason I ask is that your post is singular.
 
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Old Mar 6, 2010 | 11:43 AM
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Default thank you for the fast reply

I have tried on others and same thing. The leads are hooked up properly. do i put it on the omega side and which one, the 200, 2000 i am confused and should i be putting the leads on each pin?
 
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Old Mar 6, 2010 | 11:55 AM
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You need to unplug the injector and test the two pins on the injector. Key on or off doesn't matter because the power wire is disconnected from the injector that you're testing.
The positive wire that connects to the multimeter should have a couple different places to plug it in, you need to be sure it is plugged into the slot that is for ohms (the omega sign) and you need to make sure the switch is set to ohms.
Touch the two leads together and they should show 0. If the meter is reading 0 when testing the injector (it doesn't matter which one the leads are on. Just put one lead from the multimeter on each pin, having them on the same pin will give you a reading of 0) then that injector is most likely damaged.
 
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Old Mar 6, 2010 | 12:19 PM
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there are two pins on the injectors. I am touching one with the black lead that plugs into the "com" on the meter and the red is plugged into the ohm side which i am touching the other pin with. On injectors 6,8, 1,3 i get a zero reading. when i touch the two leads on the ohm meter it goes to zero. when i touch the two pins on any of the injectors they go to zero. so if all of them were bad i wouldn't have a running truck. i am doing something wrong. please help.
 
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Old Mar 6, 2010 | 12:26 PM
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Default pic of the meter i'm using

here is how it is setup and how i am using it.
 
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Old Mar 6, 2010 | 02:04 PM
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Try turning the dial counter clockwise one notch. The picture is to blurry to tell, but I think you have the "scale" of ohms set incorrectly, its to high (looking for hundreds or thousands or more ohms, rather than a dozen).

Turn it one notch counter clockwise. If it still doesn't read anything after touching the red contact on one pole of the injector and the black ("COM" is short for "Common" or ground) contact to the other pole, turn it another notch, same direction. Repeat the contacts to poles. You should get a reading with one of those two notches.
 
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Old Mar 6, 2010 | 02:35 PM
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for all the help.
 
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Old Mar 6, 2010 | 02:54 PM
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Keep us updated. Did it work? What did each injector read at?
 
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Old Mar 6, 2010 | 06:59 PM
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Default well...

every injector read at 0.00 on both sides of the truck. SO I gave up, and just swapped a bunch of the injectors around. It didn't fix my problem. But they will all need orings they were shot.
 
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