Quote:
Originally Posted by JimSmith
I apologize. I misunderstood his test, but still don't find it definitive. if you measure the voltage from the tip of the connector to ground with the key in the #2 position you have to be sure the time on the relay has not expired and you have to be sure the relay actually has power. And, at that point about all the test would prove is the wire from the relay to the plug was broken.
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Please refer to post #12.......herewith repeated:
Quote:
Originally Posted by Brian Carlton
Set it so that's it's on suitable scale........15V DC or 25V DC should do it.
Touch the black lead to the + battery terminal and the red lead to the - battery terminal. Confirm that the meter reads approx. 12V.
If it does........continue:
Put the tip of the black lead on the tip of one of the glow plugs (leave the red lead on the - battery terminal).
Have another person turn the key to the #2 position.
Observe the meter...........it should read about 11V..........and should stay at 11V for about 35 seconds..........when it will go to zero and you'll hear a "thunk" from the relay.
Report back with results.
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If this post was followed, as instructed, we have a definitive answer and can make a reasonable conclusion that the relay is non-functional. The chances of a broken wire to the one plug that he selected is very slim........but, I'll grant that it's not impossible.
No additional tests are required for the resistance of the glow plugs.
I'd pursue the fuse as the culprit and, if not, the relay is the next choice.