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Old 02-21-2009, 11:29 AM
diesel don diesel don is offline
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Join Date: May 2001
Location: Michigan
Posts: 1,373
Agree with previous post.

If my memory serves me, the number one plug is often the problem related to the light.

I gave up years ago and simply bench tested them. There is no rhyme or reason to the crazy things. One may last 5 months and another 10 years.

What really, really helps however is to determine which ones to bench test. For that simple exercise, I pull the cap off on the relay, put the multi-meter into each hole (red) while grounding the black on the engine block. In that way, I often only have to bench test one plug; at the most two.

cool

Diesel Don
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