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1987 - 1996 F150 & Larger F-Series Trucks
Tachometer/lights issue

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

Tachometer/lights issue

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Old

Feb 20, 2013 | 02:51 PM

#1

eightynineftwofifty

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Tachometer/lights issue

Hello I have a 1989 F250 7.3L diesel. Im having an issue with my lights and tachometer. When I turn my lights on my tachometer stops working and when I tun them off the tachometer works fine. If anyone has any Ideas please shoot them my way.

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Old

Feb 20, 2013 | 04:20 PM

#2

tjc transport

i ain't rite

Joined: Mar 2005

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From: Marlboro Mental Hospital.

Club FTE Gold Member

welcome to FTE.
first thing i would do is check the instrument cluster gauge grounds.
you may also have a bad tach in the cluster.

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Old

Feb 21, 2013 | 08:37 AM

#3

eightynineftwofifty

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Well last night I went to the store and when I turn the lights on the tach will bottom out to zero, However when I started to drive the truck the tach seemed to work fine.

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