Quote:
Originally Posted by jinman 
If you wish to replace the most expensive component first (The magnet as RickB suggests.) then you certainly may, but if I had an intermittent problem, I'd go for the relay possibly sticking or having dirty contacts. It's the lowest cost part of the two and most likely to have an intermittent problem in my opinion.
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The real value of this thread lies in the troubleshooting suggestions. Poor or no troubleshooting leads to needless parts cost. The most expensive parts are the unneeded ones. My suggestion that the magnet may be at fault here is the result of the experiences of myself and the guys I work with. If I had to travel to troubleshoot this problem, I would not leave without a magnet in hand. Power relay failure in TC's is virtually unheard of. Without getting our hands on the tractor in question as I said in a previous post, it is all speculation.