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Old 06-22-2013, 03:04 PM
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Rzeppa Rzeppa is offline
Cruise Moab Co-Chairman
 
Join Date: Aug 2005
Location: Kittredge CO, USA
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Quote:
Originally Posted by thefatkid View Post
Resistance checks are really worthless in most automotive applications. A correct way of diagnosing a problem is using voltage drop tests. Measure from after the load on any circuit to the negative terminal of the battery. Any voltage over a couple tenths shows a possible issue on the ground side. A DMM does not load a circuit and does not provide any real valuable information.
Excellent observation Brian!

In fact, the best way to validate design and workmanship in a high current application is to measure voltage drop across whatever is suspect, whether it is a connector or a conductor. Especially suspect is the return as you mentioned. I like to use star washers on frame and body connections so they dig into any coatings, whether oxidation or residual paint after it has been sanded.
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