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Joined: Oct 2005
Posts: 28
O
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I just bought a 64 pk and I am not very familiar with this type truck yet. None of the instrument lights work. I have cleaned the contacts on the fuse box,replaced the fuse and replaced the bad bulbs but none of the instrument lights will work. Is there a relay or something else I need to check? Thanks, Scott

Joined: Mar 2005
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The power to the instrument lights comes from the headlight switch. There should be a rheostat that controls the brightness of the panel lights.

Joined: Dec 2003
Posts: 103
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I had a simiilar problem on my 56. The rheostat portion of my light switch was heavily corroded. Cleaning helped enough to verify it was the problem -- replaced light switch -- all much gooder now.

Joined: Oct 2005
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Thanks for the input guys...I bought a brand new light switch and installed it but still have no instrument lights. Any other ideas?

Joined: Mar 2005
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Either you didn't turn them on, both the light switch and the rheostat, or there is no wire from the switch to the dash lights or not a good ground to the lights through the dash.

Joined: Feb 2002
Posts: 167
C
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The light switch grounds to the cab's dash to complete the circuit, sometimes they can be very tempermental.

To really pin point the problem, I'd use either one of the screw drivers that lights up when finding a "hot" wire, or digital volt meter. These 2 tools can be you best friend when hunting wire gremlins (ask me how I know LOL).

Twist the light switchknob after pulling on the knob to the 1st or to the 2nd click. Still nothing, make sure the 2 harness plugs are plugged into the main wireharness under the dash.

This plug is located on the right side of the steering column straight up, and bolts to the cab firewall way up under the dash.

Also check the wires in the wire harness to light switch. Check for "damaged" wires that got hot, corroded, or even broke. If there is, this is probably the source.


David


My truck don't leak oil, it just marks its teritory.

Moderated by  Jon G, Rusty Rod 

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