Weird speedometer issue
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Posting Guru
Joined: Dec 2012
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From: abilene kansas
Weird speedometer issue
Was driving My '94 F150 this afternoon, when the speedometer needle suddenly bounced from 30 mph, to 0, and back to 30, the odometer blanked out as it did that, What would be causing the problem?
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Since the odometer is going blank cleaning/changing/etc. the VSS on the rear axle is pointless. Check Fuse 18 for signs of stress, corrosion. If that checks out remove the dash cluster then inspect the PSOM. Well known to have cold solder joints and other damage over the years.
for reference it's the circuit board on the lower right:
for reference it's the circuit board on the lower right:
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
The back of your 1994 cluster will look like this:
The PSOM as pointed out above will look like this:
Yes you will need to take all of the gauges out the front before you get to the PSOM computer.
The PSOM as pointed out above will look like this:
Yes you will need to take all of the gauges out the front before you get to the PSOM computer.
FTE Chapter Leader
Joined: May 2006
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From: Central Mississippi
Grab one from junk yard before taking yours down if possible. It will help you practice & the one you have may not necessarily show any visible damage. Mine didn't.
I believe anything F (E?) series, 93, 94, 95 will do essentially & shouldn't cost a lot. You'll loose your mileage.
Did (or has) the shifting been hard/harsh lately?
I believe anything F (E?) series, 93, 94, 95 will do essentially & shouldn't cost a lot. You'll loose your mileage.
Did (or has) the shifting been hard/harsh lately?
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