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    reley's Avatar
    reley Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 16, 2009, 07:15 AM
    Gauge malfunction
    1990 1500 Blazer... oil pressure gauge pegs when engine running but not when key in on position with engine off. This occurs regardless if gauge is hooked up to sending unit or not?? I will add that this Blazer was a police vehicle and the wiring harness is brittle. Could some wires melted together? Any help is greatly appreciated.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    Feb 16, 2009, 08:47 AM

    Sounds like your sender wire has a short between the sender and the gauge to ground.
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