Ideally, you do not want to direct high pressure around any electrical connections as these are the weak link in the system so to speak. Give the engine a wash down with degreaser or engine wash, let it soften the grime and was down with a hose, a high pressure was can force water under the seals of the electrical plugs, this is what you want to avoid.
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Tuesday, September 4th, 2018 AT 8:45 PM