1988 f150 oil pressure gauge won't go pass L (low)
11-19-2016, 07:17 PM
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1988 f150 oil pressure gauge won't go pass L (low)
I am new to this website, I have a 1988 f150 and the oil pressure gauge doesn't work, I put in a new oil pressure sender unit and it doesn't work does anyone have an suggestions for me thanks.
11-21-2016, 06:49 AM
#2
I have the same issue on my 88. From what I've researched their is a diode on the back of the gauge in the cluster panel. Many have just jumped this or cut it out entirely and soldered a piece of wire in it's place. The diode is coded for X reading and allows this only. Not sure if I found this info on this site or another. Wish I could be more technically savvy.
02-27-2017, 12:14 AM
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Unlike a Corvette where a little tube comes up to the back of the gauge with oil in it. The 88 Ford is just a switch it is on or off. The gauge might have and L for Low and H for High on the gauge face it is just for looks. If the gauge needle moves a little you have oil pressure. I would try that diode removal trick but you might need a new gauge.
