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Apr 29, 2009 | 12:27 AM

kona56

Thread Starter

Freshman User

Joined: Sep 2008

Posts: 34

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From: Big island of Hawaii

highlight problems

hi guys i have a 1986 Ford F250 i am trying to make it legal for my safety check comin up. and i need your help because when i turn my low lights on and switch to high lights the low lights turn off and there is no highlight that turn on. can you guys pleas help me out.
THANKS...

Apr 29, 2009 | 12:50 AM

86bigred

Fleet Mechanic

Joined: Apr 2007

Posts: 1,429

Likes: 4

From: patricia ab canada

replace your dimmer switch.my guess.these switches get dirty and corrode from being under your left foot.

Apr 29, 2009 | 01:16 AM

Festus Hagen

Methanoholic

Joined: Mar 2009

Posts: 6,442

Likes: 8

From: Maine (NorCal Native)

I'd first test to see if it is the dimmer switch:

Unplug Dimmer Switch
Turn Headlights on

On the Dimmer Connector Jump the Red/Yellow (hot) to one of:

Light Green/Black for High Beam.
Red/Black for Low Beam

-Enjoy
fh : )_~

Apr 29, 2009 | 01:23 AM

86bigred

Fleet Mechanic

Joined: Apr 2007

Posts: 1,429

Likes: 4

From: patricia ab canada

good test festus.i'll remember that one.

Apr 30, 2009 | 11:53 PM

kona56

Thread Starter

Freshman User

Joined: Sep 2008

Posts: 34

Likes: 0

From: Big island of Hawaii

thanks guys so much for the help it worked...

May 1, 2009 | 12:17 AM

86bigred

Fleet Mechanic

Joined: Apr 2007

Posts: 1,429

Likes: 4

From: patricia ab canada

good to here that.that's what we do here.

May 1, 2009 | 08:03 AM

Festus Hagen

Methanoholic

Joined: Mar 2009

Posts: 6,442

Likes: 8

From: Maine (NorCal Native)

Was it the dimmer switch, or just dirty?

-Enjoy
fh : )_~

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May 1, 2009 | 07:03 PM

ligito

Posting Guru

Joined: Nov 2008

Posts: 1,229

Likes: 2

From: Oregon

My neighbor came over one night and told me the headlights were on in my '72 E-300.
I checked the switch, it was off.
I removed the switch, they were still on.
I removed the dimmer switch and they were still on.
Ghost van.
I found some wires near the windshield wiper motor that were fused together that was causing the problem.
Damnedest thing I ever saw.
Easy to fix once I found it.