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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

glow plug problem

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Old Jun 3, 2013 | 02:06 PM
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Danny in Draketown's Avatar
Danny in Draketown
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glow plug problem

I have a 1989 f250 7.3 lt diesel xlt lariat esi w/e40d. on the passenger fender the is a relay with 4 terminals on it. 12 oclock and 6 oclock are small terminals 9 oclock and 3 oclock are large terminals the 9 oclock terminal has an 8 ga wire coming right off the battery which is always hot. when I turn the key on should the 3 oclock terminal be hot then also. I believe that the wires to the glow plug relay are attached to that post, as the run via a black and pink wire and then into the tan wire that run to the glow plug relay but it does not activate when the key is turned on???
 
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