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DBGrif, you could check the back of the cluster and if the resistor is visible, this fix should still be valid.
Thanks for the tip- I suppose I can do that when I get the chance to work on my truck again- we recently moved and it's just been one thing after the other- the old pick 'em up truck has had to wait for a few things.
I bought an instrument bucket with a tach to replace my non-tach bucket. The bucket did not have a resistor on the board. I think it was from an '87. I popped it in my '89 and the gauge displayed max pressure. As soon as I put in a pressure sender from an '87 it worked like a regular pressure gauge.
I think the cutover was between '87 and '88. The '87 bucket had no resistor, My '89 did and so did a '91 bucket I bought. The pressure sender I bought for an '87 is full range. My '89 is only on/off.
I know on a 94 F150 that resistor is there. I just swapped a 94 cluster with tach in to my 95 E350 bus, I wired it up so I can short out that resistor without taking the cluster back out. With it shorted, the guage will read high like Imd91343 said. I think 97 is when they changed things again and that resistor mod won't work?????
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